Josa nadineae Martínez, Kochalka, Cabra-Garcia & Ramírez, 2025, sp. nov.
Creators: name: Martínez, Leonel
name: Kochalka, John A.
name: Cabra-Garcia, Jimmy
name: Ramírez, Martin
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Anyphaenidae
Josa
Josa nadineae

description: Josa nadineae sp. nov.
Figures 11–16
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). 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), 1 ♂ 1 ♀ (MUSENUV-Ar- 2680); Serranía Dunanchucua, northern peak of Norte Grande, 3797 m, 5.III.1975, 1 ♀ (MUSENUV-Ar- 2681); 3900 m, [10°54′01.8″N, 73°53′18.6″W], 7.III.1975, 1 ♂ (MACN-Ar 46692; vchLAM-250); Río Tucurinca, Lago Arucuina, 4176 m, 12.III.1975, 1 ♀ (MACN-Ar 46693; vchLAM-252).
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 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, 14A–B, 15B, I), bifid external section of the conductor with both branches interrupted by a deep groove (Fig. 15A–B), 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), and pronounced retrolateral basal lobe (Figs 13A, 14A). 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, 14E–F, 16).
Description. Male (holotype, MUSENUV-Ar-2678; vchLAM-249) (Fig. 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, 14A, 15A, G). Median apophysis long, laminar, ending in a very short hook-shaped tip, with many denticles (Fig. 15F, 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). Paramedian apophysis cup-shaped, concave (Figs 13A–B, 14A–B, 15A–B, D, F). Embolus tape-shaped, not describing a loop, very short, with large laminar projection (Fig. 15B, G, I), apically twisted; basal process small, flat, sclerotized, with poorly pronounced external keel and medial depression (Figs 13A–D, 14A–C, 15).
Female (paratype, MUSENUV-Ar-2679; vchLAM-251). (Fig. 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, 14D). Median field transverse, large, oval in posterior view with medial depression (Fig. 16E–F). Lateral lobes with sclerotized extensions wide, apically rounded (Fig. 16E–F). 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). Ducts of accessory bulbs long, thin, convergent (Figs 13E–F, 14E–F, 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).
description: Published as part of 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, pp. 201-242 in Zootaxa 5566 (2) on pages 216-223, DOI: 10.11646/zootaxa.5566.2.1, http://zenodo.org/record/14702734