Josa nadineae, Martínez & Kochalka & Cabra-Garcia & Ramírez, 2025

Martínez, Leonel, Kochalka, John A., Cabra-Garcia, Jimmy & Ramírez, Martin, 2025, Revealing the identity of Josa chazaliae (Simon, 1897) (Araneae: Anyphaenidae): new species and the highest altitude record for a spider in South America, Zootaxa 5566 (2), pp. 201-242 : 216-223

publication ID	https://doi.org/10.11646/zootaxa.5566.2.1
publication LSID	lsid:zoobank.org:pub:5807FF17-467F-48D9-9A9F-ECDFC0161529
DOI	https://doi.org/10.5281/zenodo.14704689
persistent identifier	https://treatment.plazi.org/id/4D76240C-FFB1-FFDC-62EB-FC13FBD7FB31
treatment provided by	Plazi
scientific name	Josa nadineae
status	sp. nov.

Treatment

Josa nadineae sp. nov.

Figures 11–16 View FIGURE 11 View FIGURE 12 View FIGURE 13 View FIGURE 14 View FIGURE 15 View FIGURE 16

Type material. Holotype: COLOMBIA. Magdalena: Ciénaga, San Pedro , Parque Natural Nacional Sierra Nevada de Santa Marta , Loma de la Cebolleta , dead mats of curly grass, manual caught, 3505 m, [10°54′09″N, 73°55′27″W], J. Kochalka leg., 9.V.1975, 1 ♂ ( MUSENUV-Ar- 2678; vchLAM-249 ) GoogleMaps . Paratypes: COLOMBIA. Magdalena: Ciénaga, San Pedro, Parque Natural Nacional Sierra Nevada de Santa Marta , north of Lago Mavaria , manual caught, 4008 m, J. Kochalka leg., 8.V.1975, 1 ♀ ( MUSENUV-Ar- 2679; vchLAM-251 ), GoogleMaps 1 ♂ 1 ♀ ( MUSENUV-Ar- 2680); GoogleMaps Serranía Dunanchucua , northern peak of Norte Grande , 3797 m, 5.III.1975, 1 ♀ ( MUSENUV-Ar- 2681); GoogleMaps 3900 m, [10°54′01.8″N, 73°53′18.6″W], 7.III.1975, 1 ♂ ( MACN-Ar 46692; vchLAM-250 ); GoogleMaps Río Tucurinca , Lago Arucuina , 4176 m, 12.III.1975, 1 ♀ ( MACN-Ar 46693; vchLAM-252 ) GoogleMaps .

Etymology. The specific name is after the Canadian arachnologist Nadine Dupérré, in recognition of her many contributions to the spider’s taxonomy.

Diagnosis. Males resemble those of Josa andesiana ( Berland, 1913) by the short and tape-shaped embolus ( Fig. 13 View FIGURE 13 E−F, compare with Dupérré, 2023: 139, fig. 16A–C; Poy. et. al. 2023: 6, fig. 3E). It can be distinguished from the latter species by the following combination of characters: laminar projection of the embolus larger ( Figs 13A–D View FIGURE 13 , 14A–B View FIGURE 14 , 15B, I View FIGURE 15 ), bifid external section of the conductor with both branches interrupted by a deep groove ( Fig. 15A–B View FIGURE 15 ), posterior branch of the conductor protruded, with many small spicules and longer than the anterior branch, which is laminar and apically irregular with small reticulations, bifid median apophysis with small scales on the external edge ( Fig. 15F View FIGURE 15 ), and pronounced retrolateral basal lobe ( Figs 13A View FIGURE 13 , 14A View FIGURE 14 ). The females are distinguished by the spermathecae converging on the median line, touching each other, the obliquely oriented posterior borders of the epigyne and the copulatory ducts anteriorly arched, widening towards the anterior part of vulva ( Figs 13E–F View FIGURE 13 , 14E–F View FIGURE 14 , 16 View FIGURE 16 ).

Description. Male (holotype, MUSENUV-Ar-2678; vchLAM-249) ( Fig. 11 View FIGURE 11 ): Total length 5.75. Carapace length 2.95, width 2.13, height 1.10. Clypeus length 0.13. Sternum length 1.45, width 0.98. Legs. Leg I: ti length 1.79/width 0.36, mt 1.39. II: ti 1.70/0.35, mt 1.46. III: ti 1.72/0.38, mt 1.75. IV: ti 2.74/0.44, mt 2.59. Spines: legs I–II, femur d 1-1-1, p 2ap, r 0-d1-d1; tibia v 2-2-2, p 1-d1-1-0, r 1-d1-1-0; metatarsus v 2-0-0, p d1-0. III–IV, femur d 1-1-1, p 0-d1-d1, r 0-d1-d1; patella r 1me; tibia v 2-2-2, p 1-d1-1-0, r 1-d1-1-0, d (r1-1) bristles; metatarsus d 0-p1-2, v 2-2-2, p d1-1-0-1, r d1-1-0-1. Abdomen: length 2.81, width 1.56, spiracle–epigastrium 1.01. Color: carapace brown, marginally darker, with two wide black degraded bands, converging and narrow anteriorly. Ocular area dark brown with eyes bordered on a black patch. Lateral regions of carapace upholstered with small fine white setae. Clypeus brown, low with some white setae. Chelicerae brown with fine setae and dark patches on frontal edge. Endites light brown, with faint medial dark patch. Labium brown reddish, anteriorly lighter. Sternum brown with faint black patches. Legs uniformly brown, covered by white setae, mainly between coxae. Abdomen dorsum with a pattern of black spots on a brown background, surrounded by a thin band, extended to medial region; dorsum with an anterior medial dark patch with posterior extensions, followed by irregular spots. Abdomen covered with fine white setae; anterior region with a dense bunch of setae, marginal ring covered by black setae. Venter uniformly brown with light and dark dots, dark patches surrounding the spinnerets base. Palp: tegulum with a basal small lobe, with granulose texture ( Figs 13A View FIGURE 13 , 14A View FIGURE 14 , 15A, G View FIGURE 15 ). Median apophysis long, laminar, ending in a very short hook-shaped tip, with many denticles ( Fig. 15F View FIGURE 15 , see square). Conductor small, rounded, ventral section apically bifid, with many narrow furrows, anterior tip apically laminar with several very small denticles, posterior tip with small granules, posterior tip slightly longer than anterior one; base of the conductor with a sharp, spine-shaped projection ( Fig. 15A, B View FIGURE 15 ). Paramedian apophysis cup-shaped, concave ( Figs 13A–B View FIGURE 13 , 14A–B View FIGURE 14 , 15A–B, D, F View FIGURE 15 ). Embolus tape-shaped, not describing a loop, very short, with large laminar projection ( Fig. 15B, G, I View FIGURE 15 ), apically twisted; basal process small, flat, sclerotized, with poorly pronounced external keel and medial depression ( Figs 13A–D View FIGURE 13 , 14A–C View FIGURE 14 , 15 View FIGURE 15 ).

Female (paratype, MUSENUV-Ar-2679; vchLAM-251). ( Fig. 12 View FIGURE 12 ): Total length 7.02. Carapace length 3.19, width 2.23, height 1.17. Clypeus length 0.13. Sternum length 1.59, width 1.06. Legs. Leg I: ti length 1.61/width 0.39, mt 1.21. II: ti 1.63/0.34, mt 1.26. III: ti 1.36/0.37, mt 1.56. IV: ti 1.95/0.38, mt 1.50. Spines: legs I–II, femur d 1-1-1, p 2ap; tibia v 2-2-2; metatarsus v 2bas. III–IV, femur d 1-1-1, p 0-d1-d1, r 0-d1-d1; patella r 1me; tibia v 2-2-2, p 1-d1-1-0, r 1-d1-1-0, d (r1-1) bristles; metatarsus d 0-p1-2, v 2-0-2, p d1-1-0-1, r d1-1-0-1. Abdomen: length 3.63, width 2.69, spiracle–epigastrium 1.53. Color pattern as in male, but more pigmented, abdominal spots more defined. Sternum and labium more pigmented. Legs with defined longitudinal dark bands on dorsal edge, and many dots on ventral one. Epigyne: anterior plate sclerotized with deep and rounded anterior excavations, laterally elongated, median depression small, quadrangular, posteriorly positioned ( Figs 13E View FIGURE 13 , 14D View FIGURE 14 ). Median field transverse, large, oval in posterior view with medial depression ( Fig. 16E–F View FIGURE 16 ). Lateral lobes with sclerotized extensions wide, apically rounded ( Fig. 16E–F View FIGURE 16 ). Copulatory ducts long, with a very wide posterior coil, laterally expanded in anterior side, joining with the accessory bulb ducts at medial level. Spermathecae small, rounded, in median position, oriented towards median septum ( Fig. 14E View FIGURE 14 ). Ducts of accessory bulbs long, thin, convergent ( Figs 13E–F View FIGURE 13 , 14E–F View FIGURE 14 , 16 View FIGURE 16 ).

Variation: Males (n=3): total length: 5.40–5.75; carapace length: 2.47–2.97, width: 1.84–2.13; abdomen length: 2.66–2.81, width: 1.56–1.69. Females (n=4): total length: 7.02–7.49; carapace length: 3.19–3.79, width: 2.23–2.67; abdomen length: 3.63–3.72, width: 1.25–2.69. Some specimens present body and abdominal spot patterns more pigmented.

Distribution. Only known from Sierra Nevada de Santa Marta, Colombia ( Fig. 31 View FIGURE 31 ).