Stethorrhagus sciurus, Xavier & Brescovit & Bonaldo, 2025

Stethorrhagus sciurus sp. nov.

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Figs. 43 View Fig , 49 View Fig , 51 View Fig

Diagnosis

Females of S. sciurus sp. nov. resembles those of S. callithrix sp. nov. and S. sylvilagus sp. nov. by the epigynal plate and CO U-shaped, disposed anteriorly in relation to SI, with VEP gently procurved, placed posteriorly on the epigynal plate ( Fig. 43C–F View Fig ), differing from S. callithrix by the CD being relatively short (from CO to posterior margin of VEP, less than four times longer than the CO width) ( Fig. 43C–F View Fig ) (CD relatively long, from CO to posterior margin of VEP, more than six times longer than the CO width in S. callithrix – Figs 32C–D View Fig , 33C–D View Fig ) and from those of S. sylvilagus sp. nov. by the area between the posterior margin of VEP and the posterior margin of the epigynal ventral plate depressed ( Fig. 43C View Fig ) (area between the posterior margin of VEP and the posterior margin of the epigynal ventral plate bulging in S. sylvilagus – Figs 25C–D View Fig , 26C–D View Fig ).

Etymology

The specific name is a noun in apposition in reference to the rodent genus Sciurus Linnaeus, 1758 , since the general conformation of the epigynum (as in Fig. 43C View Fig ) resembles a squirrel head in frontal view.

Material examined

Holotype

COLOMBIA • ♀; Cundinamarca, Sabana de Bogotá; [ 4°45′16″ N, 74°10′31″ W]; elev. 3000 m; Oct. 1956; Noguel-Maier leg.; SMF.

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Description

Male

Unknown.

Female ( holotype – SMF)

COLORATION. Cephalothorax red-brown. Legs yellow-brown. Abdomen gray dorsally and cream ventrally ( Fig. 43A View Fig ). Sternum with deep sternal excavations ( Fig. 43B View Fig ).

MEASUREMENTS. Total length 6.35. Carapace 2.73 long, 2.19 wide. Clypeus 0.26. Leg measurements: I: femur 2.05/ patella 0.92/ tibia 1.80/ metatarsus 1.47/ tarsus 1.08/ total 7.32; II: 1.86/ 0.92/ 1.63; III: 1.77/ 0.85/ 1.31/ 1.42/ 0.72/ 6.07; IV: 2.44/ 0.94/ 2.18/ 2.40/ 1.00/ 8.96. Eye diameters: AME 0.17, ALE 0.15, PME 0.14, PLE 0.14. Chelicerae 1.15 long, with three promarginal teeth and five retromarginal denticles.

LEG SPINATION. I – femur d1-0-0, p0, r0; tibia d0, p0, r0, v0-1p-1p; metatarsus d0, p0, r0, v2-2-0. II – femur d1-0-0, p0, r0; tibia missing; metatarsus missing. III – femur d1-0-0, p0, r0; tibia d0, p1-1-0, r0- 0-1, v1p-2-2; metatarsus d0, p1-1-1, r1-1-1, 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 posterior margin U-shaped, CO disposed anteriorly in relation to SI, VEP gently procurved, placed posteriorly on epigynal plate, area between posterior margin of VEP and posterior margin of epigynal plate depressed, PVP subrectangular, covering SI, CD relatively short, from CO to posterior margin of VEP, less than four times longer than CO width, narrowed in median portion ( Fig. 43 View Fig ).

Distribution

Known only from the type locality ( Fig. 49 View Fig ).