Stethorrhagus bradypus, Xavier & Brescovit & Bonaldo, 2025

Stethorrhagus bradypus sp. nov.

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Figs 37–39 View Fig View Fig View Fig , 50 View Fig

Diagnosis

Males of S. bradypus sp. nov. resemble those of S. callithrix sp. nov. and S. felis sp. nov. by the bifid VL, with thick modified hairs in both vVL and dVL, and dVL protruding ( Figs 32A–B View Fig , 33A–B View Fig , 35A–C View Fig , 36A–B View Fig , 38A–C View Fig , 39A–C View Fig ). They differ from those of S. callithrix by the SePP with a blunt tip directed apically ( Figs 38A–B View Fig , 39A–C View Fig ) (SePP with a pointed tip directed retrolaterally in S. callithrix – Figs 32A– B View Fig , 33A–B View Fig ) and from those of S. felis by the absence of both DL on the RTA and TP 1 in the tegulum (RTA with a dorsal lobe and tegulum with TP 1 in S. felis – Figs 35A–C View Fig , 36A–B View Fig ). Females resemble those of S. naja sp. nov. by the epigynum with VEP, CO disposed anteriorly in relation to SI, with a straight posterior margin ( Figs 38D–E View Fig , 39D–E View Fig ), differing by the VEP placed medially on the epigynal plate; SI extended anteriorly, with long FDs inserted on the SI’s extension, beyond the level of the CO ( Figs 38D–E View Fig , 39D–E View Fig ) (VEP placed posteriorly on the epigynal plate; SI not extended anteriorly, below the level of the CO in S. naja – Fig. 42D–E View Fig ).

Etymology

The specific name is a noun in apposition in reference to the bradypodid genus Bradypus Linnaeus, 1758 , since the general conformation of the epigynum (as in Fig. 38D View Fig ) resembles a sloth head in frontal view.

Material examined

Holotype

COLOMBIA • ♂; Quindío, Valle del Cauca , 21 km E of Calcara; [ 4°21′11″ N, 75°47′37″ W]; elev. 10000 feet; 6–11 Feb. 1974; S.J. Peck. leg.; MCZ-IZ 170622 .

GoogleMaps

Paratypes

COLOMBIA • 1 ♀; same data as for holotype; MCZ-IZ 170623 GoogleMaps • 1 ♂; same data as for holotype; MCZ-IZ 170624 GoogleMaps • 1 ♂; same data as for holotype; MCZ-IZ 170625 GoogleMaps • 1 ♀; same data as for holotype; MCZ-IZ 170626. GoogleMaps

Description

Male ( holotype – MCZ-IZ 170622)

COLORATION. Carapace and chelicerae red-brown ( Fig. 37A View Fig ). Endites, labium, sternum and legs deep orange. Abdomen gray with dark anterior stain ( Fig. 37A View Fig ). Sternum with deep sternal excavations ( Fig. 37C View Fig ).

MEASUREMENTS. Total length 7.02. Carapace 3.29 long, 2.65 wide. Clypeus 0.27. Leg measurements: I: femur 2.75/ patella 1.19/ tibia 2.44/ metatarsus 2.27/ tarsus 1.45/ total 10.10; II: 2.65/ 1.25/ 2.17/ 2.11/ 1.42/ 9.60; III: 2.57/ 1.07/ 1.81/ 2.04/ 1.17/ 8.66; IV: 2.93/ 1.24/ 2.54/ 3.27/ 1.38/ 11.36. Eye diameters: AME 0.19, ALE 0.20, PME 0.21, PLE 0.19. Chelicerae 1.84 long, with three promarginal teeth and four retromarginal denticles.

LEG SPINATION. I – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v1p-2-2-2; metatarsus d0, p0, r0, v2-2-0. II – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v1r-2-1r; metatarsus d0, p0, r0, v2-2-0. III – femur d1-1-0, p0-0-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2-2-2; metatarsus d0, p1-0-0, r1-0-0, v2-2-1. IV – femur d1- 1-0, p0-0-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2-2; metatarsus d0, p1-1-0, r1-1-0, v2-2-1.

PALP. Retrolateral surface of femur and patella with cluster of modified hairs, RTA with vVL and dVL with modified hairs, vVL larger than dVL, AS absent, DL absent, VTA slightly larger than long in ventral view, spermophor situated ventrally, TP1 and TP2 absent, SePP with blunt tip directed apically, embolus long, gently curved prolaterally in ventral view, prongs long ( Figs 38A–C View Fig , 39A–C View Fig ).

Female ( paratype – MCZ-IZ 170623)

COLORATION. As in male ( Fig. 37B View Fig ). Sternum with sternal excavations as in male ( Fig. 37D View Fig ).

MEASUREMENTS. Total length 9.18. Carapace 4.02 long, 3.02 wide. Clypeus 0.24. Leg measurements: I: femur 3.26/ patella 1.45/ tibia 2.83/ metatarsus 2.46/ tarsus 1.63/ total 11.63; II: 3.18/ 1.37/ 2.62/ 2.36/ 1.57/ 11.10; III: 2.67/ 1.28/ 2.16/ 2.48/ 1.35/ 9.94; IV: 3.53/ 1.39/ 3.03/ 3.78/ 1.59/ 13.32. Eye diameters: AME 0.22, ALE 0.21, PME 0.22, PLE 0.22. Chelicerae 2.09 long, with three promarginal teeth and four retromarginal denticles.

LEG SPINATION. I – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v1p-2-2-2; metatarsus d0, p0, r0, v2-2-0. II – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v2-2-1r; metatarsus d0, p0, r0, v2-2-0. III – femur d1-1-0, p0-1-1, r0; tibia d0, p1-1-0, r1-1-0, v2-2-2; metatarsus d0, p1-0-0, r1-0-0, v2-2-1. IV – femur d1-1-0, p0, r0-0-1; tibia d0, p0-1-0, r1-1-0, v1r-2-2; metatarsus d0, p1-0-0, r1-1-0, v2-2-1.

EPIGYNUM. CO disposed anteriorly to SI, CO with straight posterior margin, VEP placed medially on epigynal plate, PVP wider than long, covering almost entire SI, SI extended anteriorly, long FDs inserted on SI extension beyond CO level, PVP two times the distance between anterior and posterior margins, PVP with slightly procurved notch on anterior margin, CD relatively long, with large reinforcement rods from CO to posterior margin of PVP ( Figs 38D–E View Fig , 39D–E View Fig ).

Distribution

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