Stethorrhagus sciurus, Xavier & Brescovit & Bonaldo, 2025

Xavier, Cláudia, Brescovit, Antonio D. & Bonaldo, Alexandre B., 2025, Revising the revision: on 12 new species of Stethorrhagus Simon, 1896 from Colombia and Ecuador (Araneae: Corinnidae: Corinninae), with reassessments of all previously described species, European Journal of Taxonomy 1013, pp. 1-76 : 61-63

Stethorrhagus sciurus sp. nov.

urn:lsid:zoobank.org:act:

Figs. 43, 49, 51

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), 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) (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, 33C–D) 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) (area between the posterior margin of VEP and the posterior margin of the epigynal ventral plate bulging in S. sylvilagus – Figs 25C–D, 26C–D).

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) 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.

Description

Male

Unknown.

Female ( holotype – SMF)

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

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).

Distribution

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