taxonID	type	description	language	source
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	description	urn: lsid: zoobank. org: act: EEA 7 B 37 A- 300 B- 43 D 9 - 87 F 3 - 82 A 380 BC 686 D	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	type_taxon	Type species Acroterius brevis gen. et sp. nov.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	diagnosis	Diagnosis Acroterius gen. nov. resembles Diplostyla; Kaestneria Wiehle, 1956; Laetesia Simon, 1908; Laperousea Dalmas, 1917 and Zhezhoulinyphia in: epigyne with parmula, originates from the posterior margin of posterior median plate with a socket ventrally (Fig. 8 A – C; Ivie 1969: figs 105 – 108; van Helsdingen 1972: fig. 8; Millidge 1988: fig. 173; Irfan & Peng 2018: figs 5 c – d, 6 c – d; Irfan et al. 2019: figs 1 – 2, 7, 9 – 10). In the male palp, the distal margin of the radix is semicircular and has teeth as in Laetesia, Laperousea and Zhezhoulinyphia (Figs 6 A – C, 7 A – B; Millidge 1988: figs 145 – 146; Irfan et al. 2019: figs 4 a – b, d, 5 c – e, 6 a – b); the embolus and embolic membrane arise from the dorsal side of the distal margin of the radix as in Zhezhoulinyphia (Figs 6 A – C, 7 A – B; Irfan et al. 2019: figs 4 a – b, d, 5 c – e, 6 a – b). It can be distinguished by the anterior wall of the epigyne which has a posterior projection on each side (Fig. 8 A – B), but in species of Laetesia, the posterior arm of the anterior wall of the epigynal plate is long, with a copulatory opening on the posterior ventral end (Millidge 1988: figs 173, 187), and the posterior projection of the anterior wall absent in species of Diplostyla, Kaestneria and Zhezhoulinyphia (van Helsdingen 1972: fig. 8; Millidge 1988: fig. 173; Irfan & Peng 2018: figs 5 c – d, 6 c – d; Irfan et al. 2019: figs 1 – 2, 7, 9 – 10). The spermathecae are situated near the base of the parmula (Fig. 8 A – B) in Acroterius gen. nov., but towards the periphery of epigyne in species of Kaestneria, Laetesia and Zhezhoulinyphia (Millidge 1988: figs 187 – 189; Tao et al. 1995: figs 80 – 81; Irfan et al. 2019: figs 1 – 2, 7, 9 – 10). The cymbium has a cymbial retrolateral lobe (Figs 6 B – D, 7 B) as in species of Zhezhoulinyphia (Irfan et al. 2019: figs 4 b, 5 b, g, 6 b), but it is absent in Kaestneria and Laetesia (Millidge 1988: figs 143 – 144; Paquin & Dupérré 2003: figs 1544, 1547). The distal arm of the paracymbium of Acroterius gen. nov. has two or three projections and covers most of the proximal part of paracymbium (Figs 6 B – C, 7 B), the distal part of the paracymbium of all species of Kaestneria and Laetesia is simple U- or V-shaped and doesn’t cover the proximal part (Millidge 1988: figs 187 – 189; Paquin & Dupérré 2003: figs 1544, 1547) and there is a large, distal arm longer than wide, tip pendulum-shaped in species of Zhezhoulinyphia (Irfan et al. 2019: figs 4 b, 5 f, 6 b). The distal end of the distal suprategular apophysis of Acroterius gen. nov. and Kaestneria is not notched (Figs 6 B – C, 7 B; Tao et al. 1995: figs 77 – 78) (but notched in species of Laetesia, Millidge 1988: fig. 146), and proximally broad with teeth, has a distal part strongly curved into an inversed U-shape, almost touching the distal margin of the paracymbium in species of Zhezhoulinyphia (Irfan et al. 2019: figs 4 b, 5 b, g, 6 b). The tegulum of Acroterius gen. nov. has a small tegular projection ventrally (Figs 6 B – C, 7 B), which is absent in Kaestneria (Paquin & Dupérré 2003: figs 1544, 1547; Zhao & Li 2014: figs 47 b, 49 b) and Laetesia (Millidge 1988: fig. 146). The embolic division of Acroterius gen. nov. comprises a distal semicircular part of the radix with a serrated margin anteriorly; the embolus and embolic membrane arise from the terminal part of the radix (Figs 6 A – C, 7 A – B) as in species of Zhezhoulinyphia (Irfan et al. 2019: figs 4 a – b, 5 c – e, 6 a – b); the embolus and median membrane arise from the lateral (inner) side of the plate in Kaestneria and Laetesia (Millidge 1988: figs 145, 149; Zhao & Li 2014: figs 47 b, 49 b) whereas in Diplostyla the embolus arises near the base of the cymbium and extends parallel along the full length of cymbium (Ivie 1969: figs 107 – 108). In Acroterius gen. nov. the proximal end of the radix has a radical apophysis (Figs 6 A – C, 7 A – B) as in species of Zhezhoulinyphia (Irfan et al. 2019: figs 4 a – b, 5 c – e, 6 a – b), but it is absent in Diplostyla, Kaestneria and Laetesia (Ivie 1969: figs 107 – 108; Millidge 1988: figs 145, 149; Zhao & Li 2014: figs 47 b, 49 b).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	etymology	Etymology The generic name is an arbitrary combination of letters. Gender masculine.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	description	Description MEASUREMENTS. Large sized, male total length 2.66 – 3.61; female total length 2.66 – 4.15. HEAD. Cephalic region slightly elevated, yellowish to dark brown; fovea, cervical and radial grooves distinct; sternum longer than wide, green to yellowish to dark brown with spine-like hairs; labium wider than long, dark brown; maxillae long, distal end broader with scopulae. Eye region narrow, AER recurved, PER procurved slightly wider. LEGS. All legs with annuli; patella of each leg with two spines; chaetotaxy: 2 – 2 – 2 – 2; Tm I and Tm IV present. ABDOMEN. Oval, dorsally with pattern extending down to the base of spinnerets followed by irregular white patches dorso-laterally, and ventrally pale, greenish to brown with or without irregular white patches (Fig. 4 A – B). MALE PALP (Figs 1, 3, 6, 7, 10 – 12, 15 – 16, 24, 26, 30 – 31). Patella shorter than tibia, dorsally with a long spine; tibia cone shaped, with two retrolateral trichobothria, with some short and long setae on all surfaces; paracymbium highly sclerotized, proximal part simple, somewhat rectangular, distal arm with two to three projections (characterized as lateral, median and ventral projections); cymbium with retrolateral lobe, covered with long thick spines; tegulum with small projection ventrally; distal suprategular apophysis long, basally covered by embolic division. Radix with distal broad semicircular serrated part giving rise to embolus and embolic membrane, at proximal end with small radical apophysis and dorsal projection of embolic plate; dorsal projection of embolic plate long, slightly overlapping cymbium; embolic membrane curved and approachnig distal semicircular part, in prolateral view; embolus stout, short with pointed end. EPIGYNE (Figs 8, 13, 17, 21 A – D, 22, 27, 29 A – D, 32, 34 B – E, 36 A – D, 37). Anterior wall of epigyne wider than long; posterior margin of anterior wall with a projection on each side; copulatory openings situated inside the atrium between the anterior wall and posterior median plate, connected with long, semicircular copulatory ducts joined to the spermathecae. Posterior median plate posteriorly with a parmula of variable length with a socket ventrally. Spermathecae slender, present near the posterior median plate. Fertilization ducts long, present laterally on the posterior median plate, extending mesally.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEBFFFCFD0BFBEE68B3FE6C.taxon	distribution	Distribution China (Yunnan Province, Figs 38 – 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	description	urn: lsid: zoobank. org: act: 4 E 49 A 779 - 9374 - 40 FB-B 842 - BEECDAD 450 A 4 Figs 1 – 4, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	diagnosis	Differential diagnosis The new species can be distinguished from all other species of Acroterius gen. nov. by the absence of radical apophysis (Figs 1 A – C, 3 A – B).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ absens ’, meaning ‘ absent’, referring to the radical apophysis absent in male palp.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	materials_examined	Type material Holotype CHINA • ♂; Yunnan Province, Baoshan City, Nankang Yakou (National 320 Road); 24.43717 ° N, 98.46054 ° E; alt. 2186 m, 27 Oct. 2003; Guo Tang leg.; HNU-Tang 031027.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	description	Description Male (holotype) MEASUREMENTS AND COLOUR. Total length: 3.61. Carapace 1.34 long, 1.14 wide, cephalothorax yellowish to light brown; clypeus 0.56 high (Fig. 4 A – B); abdomen 2.27 long, 0.89 wide. Eye sizes and interdistances: AME 0.09, ALE 0.12, PME 0.09, PLE 0.11, AME – AME 0.05, PME – PME 0.08, AME – ALE, 0.12, PME – PLE 0.11, ALE – ALE 0.54, PLE – PLE 0.61, ALE – PLE contiguous. CHELICERAE. With five promarginal and five retromarginal teeth, promargin with deep depression and with small teeth except proximal two long; proximal second tooth much longer and almost touching upper margin of fang, distal three teeth small (Fig. 2 A – B). LENGTH OF LEGS. I = 7.48 (1.89, 2.48, 2.03, 1.08), II = 5.9 (1.83, 1.92, 1.32, 0.83), III = 4.11 (1.41, 1.16, 0.97, 0.57), IV = 5.52 (1.72, 1.69, 1.49, 0.62). Leg formula I – II – IV – III. PALP (Figs 1 A – D, 3 A – B). Paracymbium highly sclerotized, distal part with three projections (Figs 1 B, 3 B), lateral projection small, triangular; median projection broad, tongue-shaped and ventral projection thumb-like (Figs 1 B, 3 B); the distal suprategular apophysis robust with pointed end (Figs 1 A – C, 3 A – B); radical apophysis absent (Figs 1 A – C, 3 A – B). Embolus originating from distal serrated part of radix, stout, short with pointed end (Figs 1 A – C, 3 A – B). Female Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEDFFFCFDECFDE66862F87D.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	description	urn: lsid: zoobank. org: act: F 041 D 21 F- 15 E 7 - 4 C 22 - 895 A- 4 AF 2565105 D 4 Figs 5 – 9, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	diagnosis	Differential diagnosis The new species resembles A. camur gen. et sp. nov. in distal arm of paracymbium with three projection (Figs 6 B, 7 B, 10 B, 11 B), but can be distinguished from A. camur gen. et sp. nov. and all other Acroterius gen. nov. species by the ventral view, radical apophysis triangular and reaches to base of embolus (Figs 6 D, 7 A), but thumb-shaped and extends above embolus in A. camur gen. et sp. nov. (Figs 10 D 12 A). Spermathecae L-shaped, present near posterior median plate (Fig. 8 A – B), but hook-shaped and separated by one and half-length of spermathecae in A. camur gen. et sp. nov. (Fig. 13 A – B). Parmula 0.47 long (Fig. 8 D), but 0.21 long in A. camur gen. et sp. nov. (Fig. 13 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ brevis ’ meaning ‘ short’, referring to the short radical apophysis in male palp.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	materials_examined	Type material Holotype CHINA • ♂; Yunnan Province, Fugong County, Lumadeng Township, Yaping Village, Shibali; 27.16515 ° N, 98.77975 ° E; alt. 2527 m; 1 May 2004; Guang-xu Peng leg.; HNU- 20040501 – 1. Paratypes (2 ♀♀) CHINA • 1 ♀, same collection data as for holotype; HNU- 20040501 – 2 • 1 ♀; Yunnan Province, Fugong County, Yaping, 3 km to Shibali; 27.1775 ° N, 98.7550 ° E; alt. 2527 m; 4 May 2004; Heng-mei Yan and Guang-xu Peng leg.; HNU- 20040504.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	description	Description Male (holotype) MEASUREMENTS AND COLOUR. Total length: 2.66. Carapace 1.40 long, 1.14 wide, cephalothorax dark brown; clypeus 0.56 high (Fig. 9 A – B); abdomen 2.03 long, 1.60 wide. Eye sizes and interdistances: AME 0.08, ALE 0.09, PME 0.08, PLE 0.07, AME – AME 0.03, PME – PME 0.06, AME – ALE 0.08, PME – PLE 0.07, ALE – ALE 0.45, PLE – PLE 0.49. CHELICERAE. With four promarginal and four retromarginal teeth; proximal teeth of reteromargin much longer than distal one. LENGTH OF LEGS. I = 4.89 (1.63, 1.47, 1.16, 0.63), II = 3.74 (1.11, 1.31, 0.83, 0.49), III = 3.17 (0.88, 0.96, 0.82, 0.51), IV = 4.35 (1.26, 1.26, 1.17, 0.66). Leg formula I – IV – II – III. PALP (Figs 6 A – D, 7 A – B). Paracymbium highly sclerotized, distal arm with three projections; lateral projection large, curved, beak-shaped; median projection tongue-shaped; ventral projection sclerotized, thumb-shaped with blunt end, overlapping subtegulum (Figs 6 B, 7 B); distal suprategular apophysis long, robust with distal pointed end (in ventral view) (Figs 6 B – D, 7 B). Radix with small radical apophysis with pointed end (Figs 6 A – D, 7 A – B); radical apophysis somewhat triangular with blunt end (Figs 6 A, 7 A). Embolus stout, short with pointed end (Figs 6 A – D, 7 A – B). Female (HNU- 20040501 – 2, Fig. 9 C – D) MEASUREMENTS AND COLOUR. Total length: 2.97. Carapace 0.94 long, 0.83 wide, cephalothorax dark brown; fovea, cervical and radial grooves distinct; clypeus 0.27 high (Fig. 9 C – D); abdomen 1.8 long, 1.05 wide. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.07, AME – AME 0.06, PME – PME 0.07, AME – ALE 0.07, PME – PLE 0.07, ALE – ALE 0.41, PLE – PLE 0.45, ALE – PLE contiguous. LENGTH OF LEGS. I = 4.40 (1.23, 1.39, 1.03, 0.75), II = 3.92 (1.15, 1.28, 0.91, 0.58), III = 3.07 (0.94, 0.93, 0.71, 0.49), IV = 4.11 (1.13, 1.35, 0.96, 0.67). Leg formula I – IV – II – III. Tm I and Tm IV present. Patella of each leg with two spines. Tibial dorsal spine formula: 2 – 2 – 2 – 2. EPIGYNE. Parmula 0.47 long, 0.41 wide at base (Fig. 8 A – C); the posterior margin of the anterior wall of epigynal plate with a beak-shaped projection on each side (Fig. 8 A – C). Spermathecae slender, L-shaped (Fig. 8 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFEEFFF5FDFDFAC66862FEC4.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	description	urn: lsid: zoobank. org: act: B 86 B 9669 - F 527 - 44 A 7 - BAF 0 - 40 B 777161195 Figs 10 – 14, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius brevis gen. et sp. nov. (Figs 6 A – D, 7 A – B) in having similar embolus in the male palp and a short parmula in the epigyne (Figs 10 A – D, 11 A – D, 12 A – B) as in A. inversus gen. et sp. nov. and A. longidentatus gen. et sp. nov.; it can be distinguished by the distal arm of paracymbium with three projections and similar embolus, the radical thumb-shaped apophysis extends above the embolus in ventral view (Figs 10 D, 12 A), but is triangular and reaches to the base of the embolus in A. brevis gen. et sp. nov. (Figs 6 D, 7 A). Spermathecae hook-shaped, separated by one and half-length of spermathecae (Fig. 13 A – B), but L-shaped and present near the posterior median plate in A. brevis gen. et sp. nov. (Fig. 8 A – D). Parmula somewhat triangular (Fig. 13 A – D), but tongue-shaped in A. brevis gen. et sp. nov. (Fig. 8 A – C), anteriorly rectangular and posteriorly spoon-shaped in A. inversus gen. et sp. nov. (Fig. 22 A – C), finger-shaped in A. longidentatus gen. et sp. nov. (Fig. 29 A – C).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ camur ’, meaning ‘ curved’ and referring to the curved distal suprategular apophysis in the male palp.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	materials_examined	Type material Holotype CHINA • 1 ♂; Yunnan Province, Gongshan County, Bingzhongluo Township, Niwaluo He, just below Nujiang Road; 28.02499 ° N, 98.62564 ° E; alt. 1610 m; 8 Oct. 2002; D. H. Kavanaugh, P. E. Marek and Hong-bin Liang leg.; HNU-DHK – 2002 – 038. Paratypes (3 ♂♂, 23 ♀♀) CHINA – Yunnan Province • 2 ♂♂, 17 ♀♀; same collection data as for holotype; HNU-DHK – 2002 – 038 • 1 ♀; Cikai Township, Dabadi, North bank of Pula river; 27.78333 ° N, 98.51667 ° E; alt. 3030 m; 28 Sep. 2002; Heng – mei Yan leg.; HNU-Yan 020928 • 1 ♀; Cikai Township, Dabadi to Gongshan, along Pula river downward; 27.7945833 ° N, 98.5071389 ° E; alt. 3025 – 3990 m; 4 Oct. 2002; Heng – mei Yan leg.; HNU-Yan 021004 • 1 ♀; Lushui County, Waluoyaku; 25.78333 ° N, 98.78333 ° E; alt. 1070 m; 14 Oct. 2002; Heng – mei Yan leg.; HNU-Yan 021014 • 2 ♀♀; Tengchong County, Wuhe Township, Tongjia 12 - dauzhuang Village, Longchuanjiang River (Longjiang bridge); 24.89284 ° N, 98.67439 ° E; alt. 1210 m; 24 May 2005; Heng-mei Yan and Ke-ji Guo leg.; HNU-GKJ 020 • 1 ♂; Nujiang Prefecture, Nujiang State Nature Reserve, No. 12 bridge Camp area, 16.3 km W of Gongshan; 27.71503 ° N, 98.50244 ° E; alt. 2775 m; 15 – 19 Jul. 2000; Heng-mei Yan, D. H. Kavanaugh, Charles Griswold, Hongbin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU- 00 – QD • 1 ♀; Nujiang Prefecture, Nujiang State Nature Reserve, Dulong / Gongshan Yakou area, 21 km W of Gongshan; 27.69655 ° N, 98.45389 ° E; alt. 3300 – 3680 m; 16 – 17 Jul. 2000; Heng-mei Yan, D. H. Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU- 00 – BY.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	description	Description Male (holotype) MEASUREMENTS AND COLOUR. Total length: 2.95. Carapace 1.41 long, 1.14 wide, cephalothorax brown; clypeus 0.56 high (Fig. 14 A – B); abdomen 1.54 long, 1.02 wide (Fig. 14 A – B). Eye sizes and interdistances: AME 0.06, ALE 0.07, PME 0.07, PLE 0.07, AME – AME 0.04, PME – PME 0.06, AME – ALE 0.08, PME – PLE 0.07, ALE – ALE 0.42, PLE – PLE 0.46. CHELICERAE. With five promarginal and five retromarginal teeth (Fig. 14 B); proximal two teeth of reteromargin much longer than distal one. LENGTH OF LEGS. I = 6.11 (1.65, 1.92, 1.59, 0.95), II = 5.43 (1.62, 1.58, 1.38, 0.85), III = 4.13 (1.19, 1.26, 1.05, 0.63), IV = 5.61 (1.58, 1.79, 1.32, 0.92). Leg formula I – IV – II – III. PALP (Figs 10 A – D, 11 A – D, 12 A – B). Paracymbium highly sclerotized, distal arm with two projections; lateral projection small, somewhat triangular; ventral projection small with blunt end (Figs 10 B, 12 B); distal suprategular apophysis long, robust, distal part slightly curved with pointed end (Figs 10 A – C, 12 A – B). Radical apophysis thumb-shaped with blunt end extending above the embolus in ventral view (Figs 10 A – D, 11 A – D, 12 A – B). Embolus stout, short with pointed end (Figs 10 A – D, 11 A – D, 12 A – B). Female (HNU-DHK – 2002 – 038) MEASUREMENTS AND COLOUR. Total length: 2.66. Carapace 1.17 long, 1.01 wide, cephalothorax brown; clypeus 0.24 high (Fig. 14 C – D); abdomen 1.49 long, 1.21 wide (Fig. 14 C – D). Eye sizes and interdistances: AME 0.05, ALE 0.09, PME 0.08, PLE 0.07, AME – AME 0.04, PME – PME 0.06, AME – ALE 0.06, PME – PLE 0.05, ALE – ALE 0.41, PLE – PLE 0.46, ALE – PLE contiguous. CHELICERAE. With five promarginal and six retromarginal teeth; proximal teeth of reteromargin are much longer than distal one. LENGTH OF LEGS. I = 4.73 (1.31, 1.54, 1.06, 0.82), II = 4.13 (1.28, 1.23, 1, 0.62), III = 3.45 (0.99, 1.07, 0.91, 0.48), IV = 4.41 (1.29, 1.32, 1.02, 0.78). Leg formula I – IV – II – III. EPIGYNE. Parmula 0.21 long, 0.41 wide at base (Fig. 13 A – B); the posterior margin of anterior wall of epigynal plate with a projection horizontal to anterior wall of epigynal plate margin in orientation (Fig. 13 A – B). Spermathecae slender, distal part hook-shaped (Fig. 13 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFE4FFE9FDFEFE5F6862FD21.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	description	urn: lsid: zoobank. org: act: 826 A 098 B- 3362 - 42 BB- 95 F 7 - 3 E 3 E 0 C 763 F 04 Figs 15 – 18, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius brevis gen. et sp. nov. (Figs 6 A – D, 7 A – B, 8 A – D) in having a long distal suprategular apophysis and radix with broad circular serrated part, which give rise to the embolus at its distal end in the male palp, parmula with socket on ventral surface and copulatory ducts forming a semicircular loop before joining the spermathecae in epigyne (Figs 15 A – D, 16 A – B, 17 A – D); it can be distinguished by the median projection of the distal arm of paracymbium wider than long (Figs 15 B, 16 B), but longer than wide in A. brevis gen. et sp. nov. (Figs 6 B, 7 B). The embolus basally broad, disk-shaped, robust and almost touches the semicircular serrated part of the radix (Figs 15 A – D, 16 A – B), but stout, thread – like and pointing away from the semicircular serrated part of the radix in A. brevis gen. et sp. nov. (Figs 6 A – D, 7 A – B). Radical apophysis thumb-shaped, curved (Figs 15 B, 16 B), but somewhat triangular in A. brevis gen. et sp. nov. (Figs 6 B, 7 B). The spermathecae situated dorso – mesally (Fig. 17 D), but situated dorso – laterally in A. brevis gen. et sp. nov. (Fig. 8 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ circinatus ’, meaning ‘ circular’ and referring to the circinate-shaped copulatory ducts in the ventral view of the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	materials_examined	Type material Holotype CHINA • ♂; Yunnan Province, Longyang County, Bawan Township, Sancha He, Luoshuidong area; 24.92597 ° N, 98.75806 ° E; alt. 2300 m; 3 Jun. 2005; Charles Griswold leg.; HNU-CGY 137. Paratypes (9 ♂♂, 5 ♀♀) CHINA – Yunnan Province, Longyang County • 7 ♂♂; same collection data as for holotype; HNU-CGY 137 • 2 ♂♂; Bawan Township, Sanchahe, Luoshuidong area; 24.94755 ° N, 98.75564 ° E; alt. 2300 m; 3 Jun. 2005; Heng-mei Yan, Ke-ji Guo and Hong-bin Liang leg.; HNU-GKJ 039 • 3 ♀♀; Bawan Dist., Nankang Yakou; 24.83178 ° N, 98.76472 ° E; alt. 2180 m; 25 May 2005; Charles Griswold and D. H. Kavanaugh leg.; HNU- 2005 – 029 A • 2 ♀♀; Bawan Township, Dasheyao Yakou; 24.93167 ° N, 98.75368 ° E; alt. 2488 m; on top of mountain; 30 May 2005; Heng-mei Yan and Ke-ji Guo leg.; HNU-CGY 32.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	description	Description Male (holotype) MEASUREMENTS AND COLOUR. Total length: 3.25. Carapace 1.56 long, 1.24 wide, cephalic region strongly elevated, yellowish; fovea, cervical and radial grooves distinct; clypeus 0.41 high (Figs 18 A – C); abdomen 1.69 long, 1.21 wide (Fig. 18 A – C). Eye sizes and interdistances: AME 0.08, ALE 0.09, PME 0.08, PLE 0.09, AME – AME 0.04, PME – PME 0.05, AME – ALE 0.9, PME – PLE 0.12, ALE – ALE 0.44, PLE – PLE 0.48, ALE – PLE contiguous. CHELICERAE. With five promarginal and five retromarginal teeth. LENGTH OF LEGS. I = 6.57 (1.71, 2.03, 1.88, 0.95), II = 5.78 (1.62, 1.81, 1.51, 0.84), III = 4.43 (1.29, 1.33, 1.13, 0.68), IV = 5.63 (1.64, 1.68, 1.49, 0.82). Leg formula I – II – IV – III. PALP (Figs 15 A – D, 16 A – B). Paracymbium highly sclerotized, distal part with three projections, lateral projection large, slightly curved, tongue-shaped with blunt end in ventral view; median projection wider than long; ventral projection sclerotized, small with blunt end, strongly overlapping subtegulum (Figs 15 B, 16 B); distal suprategular apophysis long, distal part curved and pointing towards tegulum (Figs 15 A – D, 16 A – B). Radical apophysis slightly curved with blunt end, protruding upward above base of embolus (Figs 15 A – D, 16 A – B); embolic membrane protruding above distal semicircular part, in prolateral view (Figs 15 A, 16 A). Embolus highly sclerotized, robust, disk-shaped, almost touching semicircular serrated part of radix with pointed end (Figs 15 A – D, 16 A – B). Female (HNU-CGY 137) MEASUREMENTS AND COLOUR. Total length: 3.38. Carapace 1.42 long, 1.12 wide, yellowish; fovea, cervical and radial grooves distinct; clypeus 0.19 high (Fig. 18 D – F); abdomen 1.96 long, 1.61 wide (Fig. 18 D – F). Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.09, PLE 0.09, AME – AME 0.05, PME – PME 0.06, AME – ALE 0.07, PME – PLE 0.11, ALE – ALE 0.45, PLE – PLE 0.51, ALE – PLE contiguous. CHELICERAE. With six promarginal and seven retromarginal teeth; reteromarginal teeth gradually decrease in length towards the distal end. LENGTH OF LEGS. I = 5.32 (1.37, 1.69, 1.32, 0.94), II = 4.75 (1.36, 1.42, 1.15, 0.82), III = 3.43 (1.04, 1.04, 0.79, 0.56), IV = 4.58 (1.26, 1.44, 1.12, 0.76). Leg formula I – II – IV – III. EPIGYNE. Parmula 0.55 long, 0.24 wide at base (Fig. 17 A – B); posterior projection of anterior wall of epigynal plate circular, forming circinate appearance (Fig. 17 A – B). Spermathecae slender, situated dorso-mesally near median septum pointing toward lateral walls (Fig. 17 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFAFFEEFD95FED96862FE4C.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	description	urn: lsid: zoobank. org: act: 754 D 348 A- 8 F 5 C- 47 DA- 9940 - FDCEDD 520 F 56 Figs 19 – 21, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius brevis gen. et sp. nov. (Fig. 8 A – D) in having the posterior median plate extending posteriorly with a parmula, but can be distinguished by: in dorsal view, parmula two times the width of parmula base, with distal part distinctly expanded (Fig. 19 D), slightly longer than the width of parmula base (Fig. 19 A – D), but distal part not expanded in A. brevis gen. et sp. nov. In lateral view, anterior wall of epigynal plate projection wider than long (Figs 19 C, 21 C), but longer than wide in A. brevis gen. et sp. nov. (Fig. 8 C).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ hamatus ’, meaning ‘ hook’ and referring to the hookshaped spermathecae in the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Gongshan County, Dulongjiang Township, Kongdang Village; 27.87961 ° N, 98.33878 ° E; alt. 1527 m; 25 Oct. 2004; Guo Tang leg.; HNU-Tang – 04 – 04. Paratypes (5 ♀♀) CHINA – Yunnan Province, Gongshan County • 4 ♀♀; 77 km of new road to Donglongjiang; 27.91034 ° N, 98.41081 ° E; alt. 2183 m; 8 – 9 Nov. 2004; Guo Tang leg.; HNU-Tang – 04 – 09 • 1 ♀; Dulongjiang Township, S / N of Dizhengdang Village along Silalong He; 28.07654 ° N, 98.32603 ° E; alt. 1890 m; 28 Oct. 2004; D. H. Kavanaugh leg.; HNU-DHK – 2004 – 059.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 3.43. Carapace 1.41 long, 1.17 wide, cephalothorax brown; clypeus 0.41 high (Fig. 20 A – B); abdomen 2.01 long, 1.41 wide. Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.07, PLE 0.07, AME – AME 0.04, PME – PME 0.07, AME – ALE 0.09, PME – PLE 0.08, ALE – ALE 0.49, PLE – PLE 0.53, ALE – PLE contiguous. CHELICERAE. With six promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized protruding beyond fangs. LENGTH OF LEGS. I = 5.39 (1.74, 1.40, 1.31, 0.94), II = 4.99 (1.42, 1.54, 1.17, 0.83), III = 3.95 (1.18, 1.25, 0.9, 0.62), IV = 4.94 (1.44, 1.53, 1.18, 0.79). Leg formula I – II – IV – III. EPIGYNE. Parmula 0.53 long, 0.28 wide at base (Fig. 19 A – C); posterior margin of anterior wall of epigynal plate with projection wider than long on each side (Fig. 19 A – B). Spermathecae slender, distal part slightly curved, pointing towards posterior margin of epigyne (Fig. 19 D). VARIATION IN THE EPIGYNE (HNU-Tang – 04 – 09, Fig. 21 A – F). We noticed in the four out of five female paratypes that the epigynal parmulas are broken at the same point due to unknown reasons. All the other somatic and genitalic characters are found to be similar (Fig. 21 A – D). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFFEFFE3FDEDF9156862FB9A.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	description	urn: lsid: zoobank. org: act: 42879150 - 7 E 48 - 4 E 0 F- 8 C 7 B- 004 DDB 375847 Figs 22 – 23, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius camur gen. et sp. nov. (Fig. 13 A – D) in having the similar short parmula in epigyne as in A. brevis gen. et sp. nov. and A. longidentatus gen. et sp. nov. (Fig. 22 A – D); it can be distinguished by: spermathecae sinuous (Fig. 22 D), but hook-shaped in A. camur gen. et sp. nov. (Fig. 13 D). Parmula anteriorly rectangular and posteriorly spoon-shaped (Fig. 22 A – C), but tongueshaped in A. brevis gen. et sp. nov. (Fig. 8 A – C), somewhat triangular in A. camur gen. et sp. nov. (Fig. 13 A – C), finger-shaped in A. longidentatus gen. et sp. nov. (Fig. 29 A – C).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ inversus ’, meaning ‘ inverted’ and referring to the inverted L-shaped spermathecae in the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Lonyang County, Bawan Township, Nankang Yakou; 24.83178 ° N, 98.76472 ° E; alt. 2180 m; 25 May 2005; Charles Griswold leg.; HNU-CGY 115. Paratypes (4 ♀♀) CHINA – Yunnan Province • 2 ♀♀; Lonyang County, Baoshan City, Nankang Yakou (National 320 Road); 24.43717 ° N, 98.46054 ° E; alt. 2186 m; 30 Oct. 2003; Guo Tang leg.; HNU-Tang 031031 • 1 ♀; Lushui County, Pianma Township, Chanyan He, 9.3 km to Pianma; 25.99363 ° N, 98.66651 ° E; alt. 2470 m; mixed broadleaf deciduous and evergreen forest; 13 – 14 May 2005; Charles Griswold leg.; HNU-CGY 105 • 1 ♀; Longling County, Longjiang Township, Xiaoheishan Nature Reserve; 24.82888 ° N, 98.76001 ° E; alt. 2020 m; broadleaf forest; 26 May 2005; Charles Griswold leg.; HNU- CGY 124.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 3.33. Carapace 1.10 long, 1.08 wide, cephalic region slightly elevated, yellowish to light brown; fovea, cervical and radial grooves distinct; clypeus 0.26 high (Fig. 23 A – B); abdomen 2.22 long, 1.81 wide (Fig. 23 A – B). Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.08, PLE 0.07, AME – AME 0.04, PME – PME 0.06, AME – ALE 0.05, PME – PLE 0.11, ALE – ALE 0.44, PLE – PLE 0.48, ALE – PLE contiguous. CHELICERAE. With six promarginal and six retromarginal teeth. LENGTH OF LEGS. I = 5.04 (1.41, 1.62, 1.22, 0.79), II = 4.54 (1.37, 1.41, 1.05, 0.71), III = 3.37 (1.12, 0.93, 0.81, 0.51), IV = 4.61 (1.38, 1.42, 1.12, 0.69). Leg formula I – IV – II – III. EPIGYNE. Posterior median plate extends posteriorly with short parmula with spoon-like deep socket ventrally (Fig. 22 A – B); parmula 0.35 long, 0.25 wide at base (Fig. 22 A – B); posterior margin of anterior wall of epigynal plate wider than long, with somewhat circle-like projection (Fig. 22 A – B); copulatory openings situated inside atrium between anterior wall and posterior median plate (Fig. 22 A – B), connected with long, semicircular copulatory ducts joined to spermathecae (Fig. 22 D). Spermathecae slender, sinuous, forming almost complete wave (Fig. 22 D). Fertilization ducts present laterally on posterior median plate (Fig. 22 D). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF2FFE6FDE2FB9F6862FDAA.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	description	urn: lsid: zoobank. org: act: 896 C 3469 - C 7 F 5 - 4931 - ADBF-B 423 F 6513 F 4 A Figs 24 – 28, 38	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius longimultus gen. et sp. nov. (Figs 30 A – D, 31 A – B) in having the distal arm of paracymbium with two projections in the male palp and the long parmula with a median incision in the epigyne (Figs 24 A – D, 26 A – B); it can be distinguished by: the distal suprategular apophysis short, retained below the apex of cymbium in retrolateral view (Fig. 24 B), but long, swordshaped, protruding beyond the apex of cymbium in A. longimultus gen. et sp. nov. (Fig. 30 B). The dorsal projection of embolic plate doesn’t touch the base of cymbium in prolateral view (Figs 24 A, 26 A), but almost touches the base of cymbium in A. longimultus gen. et sp. nov. (Figs 30 A, 31 A). The lateral projection of the distal arm of the paracymbium is finger-shaped, almost touches the posterior margin of the tibia (Figs 24 B, D, 26 B), but is tongue-shaped and away from the posterior margin of the tibia in A. longimultus gen. et sp. nov. (Figs 30 B, D, 31 B). The posterior projection of the anterior wall of the epigynal plate is wider than long and doesn’t protrude beyond the epigastric furrow (Fig. 27 A – B), but is longer than wide and protruding beyond the epigastric furrow in A. longimultus gen. et sp. nov. (Fig. 32 A – B). The distal part of the spermathecae is hook-shaped (Fig. 27 D), but inverted L-shaped in A. longimultus gen. et sp. nov. (Fig. 32 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ latus ’ meaning ‘ broad’, referring to the radical apophysis with a broad distal end in the male palp.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	materials_examined	Type material Holotype CHINA • ♂; Yunnan Province, Lonyang County, Bawan Distr., Nankang Yakou; 24.83178 ° N, 98.76472 ° E; alt. 2180 m; 25 May 2005; Charles Griswold and D. H. Kavanaugh leg.; HNU-CGY 123. Paratypes (3 ♀♀) CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-CGY 123 • 1 ♀; Fugong County, 2 km down Shibali; 27.16284 ° N, 98.78989 ° E; alt. 2420 m; 2 May 2004; Guang – xu Peng leg.; HNU- 20040502 • 1 ♀; Fugong County, Lishadi Township, Shibali; 27.10520 ° N, 98.77980 ° E; alt. 2530 m; 10 Aug. 2005; Guo Tang leg.; HNU-Tang – 05 – 02.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	description	Description Male (holotype) MEASUREMENTS AND COLOUR. Total length: 3.55. Carapace 1.84 long, 1.47 wide, cephalic region slightly elevated, dark brown, with longitudinal band starting from base of posterior lateral eyes extending to base of cephalothorax followed by fovea, cervical and radial grooves distinct; clypeus 0.34 high (Fig. 28 A – B); abdomen 1.71 long, 1.29 wide. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.07, PLE 0.07, AME – AME 0.07, PME – PME 0.09, AME – ALE 0.11, PME – PLE 0.13, ALE – ALE 0.51, PLE – PLE 0.55, ALE – PLE contiguous. CHELICERAE. With six promarginal and five retromarginal teeth; distal three teeth of promargin very small (Fig. 25 B). LENGTH OF LEGS. I = 6.59 (1.79, 1.99, 1.67, 1.14), II = 4.88 (1.66, 1.69, 1.32, 1), III = 3.95 (1.34, 1.39, 0.76, 0.46), IV = 5.98 (1.74, 1.82, 1.46, 0.96). Leg formula I – IV – II – III. PALP (Figs 24 A – D, 26 A – B). Paracymbium highly sclerotized, distal arm with two projections (Figs 24 B, 26 B), lateral projection finger-like in ventral view and almost touches posterior margin of paracymbium in retrolateral view; ventral projection thumb-like with blunt end; distal suprategular apophysis slightly protruding above cymbium in ventral view (Figs 24 D, 26 B). Radical apophysis relatively large, tongueshaped, slightly curved with blunt end in ventral view (Figs 24 A – D, 26 A – B). Embolus stout, short with pointed end (Figs 24 A – C, 26 A – B). Female (HNU-CGY 123) MEASUREMENTS AND COLOUR. Total length: 3.03. Carapace 1.26 long, 1.01 wide, cephalic region slightly elevated, dark brown, with a longitudinal band starting from base of posterior lateral eyes extending to base of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.25 high (Fig. 28 C – D); abdomen 1.75 long, 1.33 wide. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.07, PLE 0.08, AME – AME 0.05, PME – PME 0.10, AME – ALE 0.08, PME – PLE 0.07, ALE – ALE 0.43, PLE – PLE 0.47, ALE – PLE contiguous. CHELICERAE. In dorsal view, chelicerae with depression at proximal end slightly below reteromargin with six promarginal and seven retromarginal teeth; reteromarginal teeth gradually decreasing in length towards base of fang (Fig. 25 A – B). LENGTH OF LEGS. I = 4.30 (1.29, 1.48, 0.89, 0.64), II = 4.05 (1.26, 1.34, 0.86, 0.59), III = 2.27 (1.02, 1.06, 0.69, 0.52), IV = 4.39 (1.23, 1.34, 1.03, 0.79). Leg formula I – IV – II – III. EPIGYNE. Parmula 0.45 long, 0.14 wide at base (Fig. 27 A – B); posterior projection of anterior wall of epigynal plate margin of epigyne wider than long, not protruding beyond epigastric furrow (Fig. 27 A – B). Spermathecae slender, distal part of spermathecae hook-shaped, slightly curved, pointing towards lateral wall of epigyne (Fig. 27 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFF7FFD9FDF4FDAD6862FCE4.taxon	distribution	Distribution China (Yunnan Province, Fig. 38).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	description	urn: lsid: zoobank. org: act: F 372 CAB 7 - 6 C 3 F- 403 D- 809 D- 4 FDA 72 FB 7 B 10 Figs 29, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius brevis gen. et sp. nov. (Fig. 8 A – D) in having a similar short parmula as in A. camur gen. et sp. nov. and A. longidentatus gen. et sp. nov. and the C-shaped distal part of spermathecae in epigyne (Fig. 29 A – D); it can be distinguished by: the posterior projection of the anterior wall of the epigynal plate C-shaped in ventral view, somewhat triangular in lateral view and retained below the lateral margin of anterior wall of the epigyne in the new species (Fig. 29 A – C), but beak-shaped in ventral view, protruding above the lateral margin in A. brevis gen. et sp. nov. (Fig. 8 A – C). The spermathecae are situated near the median septum (Fig. 29 D), but situated away from the median septum in A. brevis gen. et sp. nov. (Fig. 8 D). Parmula finger-shaped (Fig. 29 A – C), but tongue-shaped in A. brevis gen. et sp. nov. (Fig. 8 A – C), anteriorly rectangular and posteriorly spoon-shaped in A. inversus gen. et sp. nov. (Fig. 22 A – C) and somewhat triangular in A. camur gen. et sp. nov. (Fig. 13 A – C).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ longus ’ + ‘ dentatus ’, meaning ‘ long’ + ‘ teeth’ and referring to the long and highly sclerotized teeth on the retrolateral margin of the chelicerae in the female.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Longling County, Longjiang Township, Xiaoheishan Nature Reserve; 24.82888 ° N, 98.76001 ° E; alt. 2020 m; broadleaf forest; 28 May 2005; Charles Griswold and D. H. Kavanaugh leg.; HNU- 2002 – 033 A. Paratypes (5 ♀♀) CHINA – Yunnan Province • 4 ♀♀; same collection data as for holotype; HNU- 2002 – 033 A • 1 ♀; Longling County, Longjiang Township, Xiaoheishan Nature Reserve; 24.83671 ° N, 98.76185 ° E; alt. 2067 m; hand collecting; 28 May 2005; Heng-mei Yan and Guo Ke-ji leg.; HNU-GKJ 029.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 3.73. Carapace 1.27 long, 1.18 wide, cephalic region slightly elevated, yellowish brown, with distinct pattern starting from the base of posterior median eyes; fovea, cervical and radial grooves distinct; clypeus 0.27 high (Fig. 29 E – F); abdomen 2.47 long, 1.81 wide. Eye sizes and interdistances: AME 0.07, ALE 0.11, PME 0.08, PLE 0.08, AME – AME 0.05, PME – PME 0.08, AME – ALE 0.11, PME – PLE 0.09, ALE – ALE 0.51, PLE – PLE 0.55, ALE – PLE contiguous. CHELICERAE. With six promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized. LENGTH OF LEGS. I = 6.13 (1.67, 1.95, 1.55, 0.96), II = 5.50 (1.45, 1.75, 1.51, 0.79), III = 3.50 (0.98, 1.07, 0.91, 0.54), IV = 5.02 (1.23, 1.61, 1.36, 0.82). Leg formula I – II – IV – III. EPIGYNE. Parmula 0.36 long, 0.23 wide at base (Fig. 29 B); the posterior projection of anterior wall of epigynal plate circular in ventral view; somewhat triangular and retained below lateral wall of epigynal plate in lateral view (Fig. 29 A – C). Spermathecae slender, distal part C-shaped and situated near median septum (Fig. 29 D). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCDFFDEFD83FED96862FE22.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	description	urn: lsid: zoobank. org: act: A 79 B 8 C 4 E- 1540 - 4031 - A 067 - 7 F 12809 D 5 B 95 Figs 30 – 33, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius latus gen. et sp. nov. (Figs 24 A – D, 26 A – B) in having the distal arm of the paracymbium with two projections in the male palp and the long parmula with a median incision in the epigyne (Figs 31 A – B, 32 A – D); it can be distinguished by: the distal suprategular apophysis long, sword-shaped, protruding beyond the apex of cymbium in retrolateral view (Figs 30 B, 31 B), but short, retained below the apex of cymbium in A. latus gen. et sp. nov. (Figs 24 B, 26 B). The dorsal projection of the embolic plate almost touches the base of the cymbium in prolateral view (Figs 30 A, 31 A), but doesn’t touch the base of the cymbium in A. latus gen. et sp. nov. (Figs 24 A, 26 A). The lateral projection of the distal arm of the paracymbium is tongue-shaped, away from the posterior margin of the tibia (Figs 30 B, D, 31 B), but finger-shaped, almost touching the posterior margin of the tibia in A. latus gen. et sp. nov. (Figs 24 B, D, 26 B). The posterior projection of the anterior wall of the epigynal plate is longer than wide, protruding beyond the epigastric furrow (Fig. 32 A – B), but wider than long, not protruding beyond the epigastric furrow in A. latus gen. et sp. nov. (Fig. 27 A – B). The distal part of spermathecae inverted L-shaped (Fig. 32 D), but hook-shaped in A. latus gen. et sp. nov. (Fig. 27 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ longus ’ + ‘ multus ’, meaning ‘ long’ + ‘ much’ and referring to the very long distal suprategular apophysis in the male palp.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	materials_examined	Type material Holotype CHINA • ♂; Yunnan Province, Fugong County, Lumadeng Township, Yaping Village, Shibali; 27.16515 ° N, 98.77975 ° E; alt. 2527 m; 1 May 2004; Guang – xu leg.; HNU- 20040501 – 1. Paratypes (1 ♂, 1 ♀) CHINA • 1 ♂, 1 ♀; same collection data as for holotype; HNU- 20040501 – 2.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	description	Description Male (holotype) MEASUREMENTS. Total length: 3.18. Carapace 1.53 long, 1.23 wide, cephalic region slightly elevated, brown; fovea, cervical and radial grooves distinct; clypeus 0.21 high (Fig. 33 A – B); abdomen 1.65 long, 1.19 wide (Fig. 33 A – B). Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.07, PLE 0.09, AME – AME 0.04, PME – PME 0.07, AME – ALE 0.08, PME – PLE 0.08, ALE – ALE 0.44, PLE – PLE 0.51. CHELICERAE. With five promarginal and five retromarginal teeth; teeth of reteromargin almost equal in length. LENGTH OF LEGS. I = 5.56 (1.39, 1.61, 1.63, 0.93), II = 4.80 (1.32, 1.43, 1.28, 0.77), III = 3.87 (1.21, 1.08, 1.04, 0.54), IV = 5.45 (1.39, 1.73, 1.61, 0.72). Leg formula I – IV – II – III. PALP (Figs 30 A – D, 31 A – B). Paracymbium highly sclerotized, distal arm with three projections; lateral projection large, curved, beak-shaped with pointed end in retrolateral view; median projection tongueshaped, wider than long; ventral projection sclerotized, tip curved with blunt end, strongly overlapping subtegulum (Figs 30 B, 31 B); distal suprategular apophysis much longer than that of all other species in this genus, sword-shaped, protruding above cymbium (Figs 30 A – D, 31 A – B). Radical apophysis longer than wide, finger-shaped with broad blunt end, pointing towards distal margin of radix in ventral view (Figs 30 A – D, 31 A – B). Dorsal projection of embolic plate with broad, round end, curved and almost touching base of cymbium in prolateral view (Figs 30 A, 31 A). Embolus stout, short with pointed end (Figs 30 A – C, 31 A – B). Female (HNU- 20040501 – 02) MEASUREMENTS. Total length: 2.67. Carapace 1.13 long, 0.91 wide, cephalic region slightly elevated, yellowish brown, with longitudinal band starting from base of posterior lateral eyes extending to middorsal; fovea, cervical and radial grooves distinct; Clypeus 0.24 high (Fig. 33 D – E); abdomen 1.54 long, 1.16 wide. Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.06, PLE 0.07, AME – AME 0.04, PME – PME 0.05, AME – ALE 0.06, PME – PLE 0.09, ALE – ALE 0.39, PLE – PLE 0.42, ALE – PLE contiguous. CHELICERAE. With five promarginal and five retromarginal teeth. LENGTH OF LEGS. I = 3.88 (1.19, 1.31, 0.86, 0.52), II = 3.74 (1.15, 1.08, 0.88, 0.63), III = 2.62 (0.8, 0.84, 0.61, 0.37), IV = 3.37 (0.93, 1.03, 0.86, 0.55). Leg formula I – II – IV – III. EPIGYNE. Lateral margin of parmula wave-like on each side (Fig. 32 A – C); parmula 0.45 long, 0.15 wide at base (Fig. 32 A – C); posterior projection of anterior wall of epigynal plate longer than wide and protruding beyond epigastric furrow (Fig. 32 A – B). Spermathecae slender, inverted L-shaped (Fig. 32 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFCFFFD2FD98FE256862FDAE.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	description	urn: lsid: zoobank. org: act: 5 E 2 F 3303 - 07 EE- 4 A 75 - 9 FE 8 - 62 EC 8372 BB 8 C Figs 34, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius hamatus gen. et sp. nov. (Fig. 19 A – D) in having long parmula in epigyne (Fig. 34 B – E); it can be distinguished by: the posterior projection of the anterior wall of the epigynal plate longer than wide (Figs 34 B – C), but wider than long in A. hamatus gen. et sp. nov. (Figs 19 A – B, 21 A – B). In ventral view, the distal part of parmula is not expanded (Fig. 34 B – C), but distinctly expanded in A. hamatus gen. et sp. nov. (Fig. 19 A – B). The spermathecae are not curved (Fig. 34 E), but the tip is curved, pointing towards the posterior margin of the epigyne in A. hamatus gen. et sp. nov. (Figs 19 D, 21 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ longus ’ + ‘ projectus ’ meaning ‘ long’ + ‘ projection’, referring to the long posterior projection of the anterior wall of the epigynal plate in the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Fugong County, Lumadeng Township, Yakou of old Shibali; 27.06430 ° N, 98.75123 ° E; alt. 3270 m; 13 Aug. 2005; Guo Tang leg.; HNU-Tang – 05 – 06.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 3.15. Carapace 1.33 long, 0.97 wide, cephalic region slightly elevated, brown, dorsally with distinct pattern starting from base of posterior eyes extending to proximal part of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.26 high (Fig. 34 A); Abdomen 1.83 long, 1.48 wide (Fig. 34 A). Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.06, PLE 0.07 AME – AME 0.04, PME – PME 0.06, AME – ALE 0.07, PME – PLE 0.09, ALE – ALE 0.42, PLE – PLE 0.45, ALE – PLE contiguous. CHELICERAE. With six promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized. LENGTH OF LEGS. I = 4.66 (1.14, 1.35, 1.2, 0.77), II = 3.78 (0.95, 1.2, 1.11, 0.52), III = 2.45 (0.84, 1.02, 1.11, 0.49), IV = 4.16 (1.17, 1.23, 1.11, 0.65). Leg formula I – IV – II – III. EPIGYNE. Parmula 0.49 long, 0.27 wide at base (Fig. 34 B – C); posterior projection of anterior wall of epigynal plate longer than wide on either side (Fig. 34 B – C). Spermathecae slender, long, almost touches lateral wall of epigyne on each side (Fig. 34 E). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC2FFD3FD8FFED86862F87D.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	description	urn: lsid: zoobank. org: act: 33 E 64 A 5 A-FD 47 - 48 ED-B 075 - B 721 D 9 EDE 3 A 3 Figs 35 – 36, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius longidentatus gen. et sp. nov. (Fig. 29 A – C) in having a similar circular posterior projection of the anterior wall of the epigynal plate in the epigyne (Fig. 36 A – C); it can be distinguished by the anterior wall of the oval epigynal plate margin (Fig. 36 A – B), but semicircular in A. longidentatus gen. et sp. nov. (Fig. 29 A – B). In dorsal view, parmula with wave-like margin and almost four times as long as median septum (Fig. 36 D), but tongue-shaped and as long as median septum in A. longidentatus gen. et sp. nov. (Fig. 29 D). The spermathecae are hook-shaped (Fig. 36 D), but C-shaped in A. longidentatus gen. et sp. nov. (Fig. 29 D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ ovatus ’, meaning ‘ oval’ and referring to the oval anterior wall of the epigynal plate margin of the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Tengchong County, Mingguang Township, Zizhi Village; 25.79808 ° N, 98.62406 ° E; alt. 2756 m; 19 May 2006; Chang-min Yin, Jia-fang Hu and Ming-wei Yang leg.; HNU-YHY 06.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 3. Carapace 1.01 long, 0.96 wide, cephalic region slightly elevated, dark brown, dorsally with distinct pattern starting from base of posterior eyes extending to proximal part of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.23 high (Fig. 35 A – B); abdomen 1.99 long, 1.49 wide (Fig. 35 A – B). Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.07, AME – AME 0.04, PME – PME 0.06, AME – ALE 0.09, PME – PLE 0.07, ALE – ALE 0.45, PLE – PLE 0.48, ALE – PLE 0.02. CHELICERAE. With five promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized, protruding beyond fangs. LENGTH OF LEGS. I = 4.34 (1.19, 1.35, 1.07, 0.73), II = 4.03 (1.14, 1.28, 0.89, 0.72), III = 2.76 (0.94, 0.72, 0.65, 0.45), IV = 3.56 (1.15, 1.08, 0.74, 0.59). Leg formula I – II – IV – III. EPIGYNE. Lateral margin of parmula wave-like (Fig. 36 A – B); parmula 0.57 long, 0.18 wide at base (Fig. 35 A – B); anterior wall of epigynal plate margin oval (Fig. 36 A – B); posterior projection of anterior wall of epigynal plate somewhat circular on each side (Fig. 36 A – B). Spermathecae slender, hook-shaped pointing towards lateral margin of epigyne (Fig. 36 D). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC5FFD7FDFEFA616862FD43.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	description	urn: lsid: zoobank. org: act: 959 DFFDC-D 4 A 9 - 41 C 5 - B 099 - B 7 AA 5047 F 2 D 8 Figs 37, 39	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	diagnosis	Differential diagnosis The new species resembles Acroterius brevis gen. et sp. nov. in having similar hook-shaped spermathecae; it can be distinguished by the triangular parmula, shorter than the median septum in the new species (Fig. 37 A, D), but tongue-shaped and longer than the median septum in A. brevis gen. et sp. nov. (Fig. 8 A – B, D).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	etymology	Etymology The species name comes from the Latin adjective ‘ parvus ’, meaning ‘ small’, referring to the small parmula of the epigyne.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	materials_examined	Type material Holotype CHINA • ♀; Yunnan Province, Gongshan County, Bingzhongluo Township, Chukuai; 27.97928 ° N, 98.47389 ° E; alt. 3725 m; 19 Aug. 2006; Peng Hu leg.; HNU-Hu 060819. Paratype (1 ♀) CHINA • 1 ♀; same collection data as for holotype; HNU-Hu 060819.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	description	Description Female (holotype) MEASUREMENTS AND COLOUR. Total length: 4.15. Carapace 1.60 long, 2.90 wide, cephalic region slightly elevated, brown, dorsally with dark brown longitudinal band starting from base of posterior eyes extending to proximal part of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.41 high (Fig. 37 E – F); abdomen 2.55 long, 2.35 wide. Eye sizes and interdistances: AME 0.13, ALE 0.1, PME 0.09, PLE 0.12, AME – AME 0.06, PME – PME 0.08, AME – ALE 0.07, PME – PLE 0.12, ALE – ALE 0.51, PLE – PLE 0.62, ALE – PLE 0.03. CHELICERAE. With six promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized. LENGTH OF LEGS. I = 7.25 (1.97, 2.24, 1.83, 1.21), II = 6.48 (1.87, 1.89, 1.69, 1.03), III = 4.63 (1.52, 1.34, 1.16, 0.61), IV = 6.02 (1.75, 1.84, 1.54, 0.89). Leg formula I – II – IV – III. EPIGYNE. Posterior median plate extends posteriorly with small triangular parmula, wider than long (Fig. 37 A – B); parmula 0.26 long, 0.26 wide at base (Fig. 37 A – B); posterior projection of anterior wall of epigynal plate circular in ventral view, somewhat triangular in lateral view on each side (Fig. 37 A – B). Spermathecae slender, distal part slightly curved and pointing towards fertilization ducts (Fig. 37 D). Male Unknown.	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
5C2F211FFFC6FFC9FDF8FCC66862FD53.taxon	distribution	Distribution China (Yunnan Province, Fig. 39).	en	Irfan, Muhammad, Bashir, Shahida, Peng, Xianjin (2021): Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China. European Journal of Taxonomy 743: 1-53, DOI: 10.5852/ejt.2021.743.1293, URL: http://dx.doi.org/10.5852/ejt.2021.743.1293
