Stethorrhagus naja, Xavier & Brescovit & Bonaldo, 2025

Stethorrhagus naja sp. nov.

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Figs 40–42 View Fig View Fig View Fig , 50 View Fig

Diagnosis

Males of S. naja sp. nov. resemble those of S. chalybeius by the bifid VL, with dVL protuding and thick modified hairs only present on the vVL, dVL glabrous ( Fig. 41B–C View Fig ), differing by the large finger-shaped SePP as long as the embolus, with a blunt tip ( Fig. 41A View Fig ) (SePP smaller than the embolus, comma-shaped, tip pointed in S. chalybeius – Bonaldo & Brescovit 1994: fig. 16a). Females resemble those of S. bradypus sp. nov. by the epigynum with VEP, CO disposed anteriorly in relation to SI, with straight posterior margin ( Fig. 41D View Fig ), differing by the VEP placed posteriorly on the epigynal plate; SI not extended anteriorly, below the level of CO ( Figs 41D–E View Fig , 42E–F View Fig ) (VEP placed medially on epigynal plate; SI extended anteriorly, with long FDs inserted on the SI’s extension, (beyond the level of the CO in S. bradypus – Figs 38D–E View Fig , 39D–E View Fig ).

Etymology

The specific name is a noun in apposition in reference to the elapid genus Naja Laurenti, 1768 , since the anterior sector of the epigynum (as in Fig. 41D View Fig ) resembles a cobra with spread hood.

Material examined

Holotype

COLOMBIA • ♂; Cundinamarca, Parque Nacional Natural de Chingaza ; [ 4°0′ N, 73°30′ W]; elev. 3150 m; 16 Dec. 1997; E. Niao leg.; pitfall; ICN-Ar 6477 .

GoogleMaps

Paratypes

COLOMBIA – Cundinamarca • 1 ♀; same data as for holotype; ICN-Ar 13743 GoogleMaps • 1 ♂; same data as for holotype; 24 Jan. 1998; Guarda Bosques leg.; ICN-Ar 6470 . GoogleMaps

Description

Male ( holotype – ICN-Ar 6477)

COLORATION. Carapace, chelicerae, endites and sternum red-brown ( Fig. 40A View Fig ). Labium orange. Legs brown. Abdomen gray with dorsal muscular impression orange ( Fig. 40A View Fig ). Sternum with deep sternal excavations ( Fig. 40C View Fig ).

MEASUREMENTS. Total length 5.40. Carapace 2.47 long, 1.85 wide. Clypeus 0.22. Leg measurements: I: femur 1.93/ patella 0.77/ tibia 1.53/ metatarsus 1.49/ tarsus 1.19/ total 6.91; II: 1.80/ 0.76/ 1.35/ 1.42/ 1.09/ 6.42; III: 1.55/ 0.64/ 1.08/ 1.40/ 0.82/ 5.49; IV: 2.07/ 0.80/ 1.65/ 2.09/ 0.93/ 7.54. Eye diameters: AME 0.13, ALE 0.11, PME 0.12, PLE 0.11. Chelicerae 1.15 long, with three promarginal teeth and five retromarginal denticles.

LEG SPINATION. I – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v0-2-0; metatarsus d0, p0, r0, v2-2-0. II – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v0-2-0; metatarsus d0, p0, r0, v2-2-0. III – femur d1-1-0, p0, r0; tibia d0, p1-1-0, r1-1-0, v1p-1p-2; metatarsus d0, p0-1-0, r0-1-0, v2-2-1. IV – femur d1-1-0, p0, r0-0-1; tibia d0, p1-1-0, r1-1-0, v1p-1p-2; metatarsus d0, p1-1-0, r1-1-0, v2-2-1.

PALP. Retrolateral surface of femur with a cluster of modified hairs, vVL with modified hairs, dVL glabrous, well-developed, subrectangular, vVL larger than dVL, AS absent, DL absent, VTA slightly broader than long in ventral view, spermophor situated prolaterally, TP1 small, triangular, TP2 absent, SePP well-developed, finger-shaped, tip blunt, pointed retrolaterally, embolus long, not curved, prongs short, not curved ( Figs 41A–C View Fig , 42A–C View Fig ).

Female ( paratype – ICN-Ar 13743)

COLORATION. As in male, except abdomen totally dark gray ( Fig. 40B View Fig ). Sternum with sternal excavations as in male ( Fig. 40D View Fig ).

MEASUREMENTS. Total length 6.97. Carapace 2.70 long, 2.00 wide. Clypeus 0.22. Leg measurements: I: femur 1.99/ patella 0.94/ tibia 1.50/ metatarsus 1.49/ tarsus 1.08/ total 7.00; II: 1.92/ 0.90/ 1.34/ 1.45/ 1.14/ 6.75; III: 1.65/ 0.79/ 1.15/ 1.36/ 0.88/ 5.83; IV: 2.21/ 0.91/ 1.86/ 2.24/ 0.96/ 8.18. Eye diameters: AME 0.13, ALE 0.11, PME 0.11, PLE 0.12. Chelicerae 1.34 long, with three promarginal teeth and five retromarginal denticles.

LEG SPINATION. I – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v0-2-0; metatarsus d0, p0, r0, v2-2-0. II – femur d1-1-0, p0, r0; tibia d0, p0, r0, v0-1p-0; metatarsus d0, p0, r0, v2-2-0. III – femur d1-1-0, p0, r0; tibia d0, p0-1-0, r0-1-0, v1p-2-2; metatarsus d0, p1-1-0, r1-1-0, v2-2-1. IV – femur d1-1-0, p0, r0; tibia d0, p1-1-0, r1-1-0, v1p-1p-2; metatarsus d0, p1-1-1, r1-1-1, v2-2-1.

EPIGYNUM. CO disposed anteriorly in relation to SI, CO with straight posterior margin, VEP placed posteriorlly on epigynal plate, PVP wider than long, covering entire SI, PVP as wide as four times the distance between anterior and posterior margins, PVP with slightly procurved notch along anterior margin, copulatory duct as long as two times the distance between anterior and posterior margins of PVP ( Figs 41D–E View Fig , 42D–E View Fig ).

Distribution

Known only from the type locality ( Fig. 50 View Fig ).