Ageleradix nangunhe Mu, Wang & Zhang, 2025

Mu, Yan-Nan, Wang, Lu-Yu, Ren, Tian-Yu, Tian, Yuan & Zhang, Zhi-Sheng, 2025, Review of the genus Ageleradix Xu & Li, 2007 (Araneae, Agelenidae), with descriptions of three new species, ZooKeys 1236, pp. 197-208 : 197-208

Ageleradix nangunhe Mu, Wang & Zhang sp. nov.

Chinese name: 南滚河盾漏斗蛛 Fig. 4

Type material.

Holotype • ♂, China, Yunnan Prov., Lincang City, Cangyuan Co., Nangunhe National Nature Reserve , Mengjiao station ; 23°16'36.01"N, 99°11'24.13"E, elev. 1747 m, 29.09.2024, leg. Y. J. Cai and L. X. Cheng . Paratypes: • 2 ♀, with same data as holotype .

Etymology.

The specific name is derived from the type locality; noun in apposition.

Diagnosis.

The male of this new species resembles those of A. schwendingeri in having similarly shaped retrolateral tibial apophysis (RTA) and short tibia (cf. Fig. 4 E – G and Fig. 5 E – G , fig. 26 D in Zhu et al. 2017), but can be differentiated from it by: 1) embolus (E) long, filiform (Fig. 4 E – G ) (vs. short, hooked, fig. 26 D in Zhu et al. 2017); and 2) conductor (C) membranous, with rounded tip (Fig. 4 E – G ) (vs. strongly sclerotized, tip winding, Fig. 4 E – G and Fig. 5 E – G ). The female of the new species resembles those of A. cymbiforma in having similarly shaped atrium located posteriorly (cf. Fig. 4 C and fig. 24 A in Zhu et al. 2017), but can be differentiated from it by: 1) septum (Sp) 2 times longer than wide (Fig. 4 C ) (vs. narrow, more than 4 times longer than wide, fig. 24 A in Zhu et al. 2017); and 2) copulatory bursae (CB) balloon-shaped (Fig. 4 D ) (vs. clavate, fig. 24 B in Zhu et al. 2017).

Description.

Male (holotype, Fig. 4 A ). Total length 8.40. Carapace: 3.90 long, 2.82 wide. Abdomen: 4.90 long, 2.86 wide. Eye sizes and interdistances: AME 0.23, ALE 0.25, PME 0.19, PLE 0.25, AME – AME 0.08, AME – ALE 0.09, PME – PME 0.16, PME – PLE 0.13, ALE – PLE 0.11. MOA: anterior width 0.49, posterior width 0.56, 0.58 long. Clypeus 0.19 long. Chelicerae with 3 promarginal and 5 retromarginal teeth. Leg measurements: I 16.77 (4.37, 5.35, 4.42, 2.63), II 13.74 (3.80, 4.20, 3.50, 2.24), III 12.68 (3.46, 3.66, 3.64, 1.92), IV 17.07 (4.55, 5.08, 5.20, 2.24). Carapace yellow, with 2 rows of brown stripe. Cervical groove and radial groove distinct. Fovea short, slightly depressed. Abdomen ovoid, gray; cardiac mark red-brown. Anterior spinnerets shorter than basal segment of posterior-lateral spinnerets.

Palp (Fig. 4 E – G ). Tibia shorter than cymbium, about 1 / 3 length of cymbium, with small retrolateral lump (bTA). Retrolateral tibial apophysis (RTA) nearly as long as tibia, nubbly, roundly bent dorsally. Cymbial tip about 1 / 5 width of median part of cymbium. Bulb oval. Tegulum with horseshoe-shaped apophysis (TA) located almost medially, retrolateral margin with subconical baso-prolateral process (Tp). Conductor (C) nubbly, extending posteriorly, bifurcated at tip. Radix (R) with sclerotized base and membranous, tongue-shaped tip. Median apophysis (MA) membranous, thumb-shaped. Embolus (E), with wide base, gradually tapering into filamentous embolus proper, roundly clockwise bent embolus proper as long as half of bulb, tip resting on 3 ' clock position.

Female (paratype Fig. 4 B ). Total length 9.18. Carapace: 4.29 long, 3.17 wide. Abdomen: 5.28 long, 2.96 wide. Eye sizes and interdistances: AME 0.26, ALE 0.26, PME 0.23, PLE 0.25, AME – AME 0.09, AME – ALE 0.10, PME – PME 0.18, PME – PLE 0.14, ALE – PLE 0.11. MOA: anterior width 0.51, posterior width 0.59, 0.62 long. Clypeus 0.15 long. Chelicerae with 3 promarginal and 4 retromarginal teeth. Leg measurements: I 15.19 (4.06, 4.92, 3.74, 2.47), II 12.98 (3.66, 4.15, 3.21, 1.96), III 12.83 (3.56, 4.08, 3.34, 1.85), IV 17.42 (4.81, 5.21, 5.11, 2.29). Color darker than male, appearance of body similar as male.

Epigyne (Fig. 4 C – D ). Atrium large, posteriorly located, with distinct scape (Sc) and septum (Se). Copulatory openings (CO) located anteromesally. Copulatory ducts (CD) transparent, membranous, sclerotiozed part encircling spermatecae. Copulatory bursae (CB) balloon-shaped, transparent. Spermathecae (S) spherical, located anteriorly. Spermathecal head (SH) clavate. Fertilization ducts (FD) long, well sclerotized extending to posterior of epigynal plate.

Distribution.

Known only from the type locality.

Figures

Figure 4. Mu, Wang & Zhang, sp. nov., male holotype and female paratype A male, dorsal view B female, dorsal view C epigyne, ventral view D same, dorsal view E left palp, prolateral view F same, ventral view G same, retrolateral view. Abbreviations: bTA — basal tibial apophysis; C — conductor; CB — copulatory bursa; CD — copulatory duct; CO — copulatory opening; E — embolus; FD — fertilization duct; MA — median apophysis; R — radix; RTA — retrolateral tibial apophysis; S — spermathecae; Sc — scape; Se — septum; SH — spermathecal head; TA — tegular apophysis; Tp — tegular process.

Figure 5. Habitus of Ageleradix schwendingeri Zhang, Li & Xu, 2008 A male, dorsal view B female, dorsal view C epigyne, ventral view D same, dorsal view E male left palp, prolateral view F same, ventral view G same, retrolateral view. Abbreviations: C — conductor; E — embolus; MA — median apophysis; R — radix; RTA — retrolateral tibial apophysis; TA — tegular apophysis; Tp — tegular process; S — spermathecae; Sc — scape.