Stethorrhagus canis Xavier, Brescovit & Bonaldo, 2025, sp. nov.
Year: 2025
Type: other
Abstract: Stethorrhagus canis sp. nov. urn:lsid:zoobank.org:act: 9B0CE66C-3675-4EA9-911D-41E8DA950DC4 Figs 47, 49–50 Diagnosis Females resemble those of S. felis sp. nov. and S. ovis sp. nov. by the CO slit-shaped, disposed posteriorly in relation to SI (Figs 29C–D, 30C–D, 35D–E, 36C–D), differing by the CO large, as wide as the distance between the CO and the posterior margin of the epigynal plate, located on the posterior half of the epigynal plate (Fig. 47C–F) (CO relatively small, as wide as five times the distance between the CO and the posterior margin of the epigynal plate, located on the anterior half of the epigynal plate in both S. felis and S. ovis – Figs 29C–D, 30C–D, 36C–D, 35D–E). Etymology The specific name is a noun in apposition in reference to the carnivor genus Canis Linnaeus, 1758, since the general conformation of the epigynum (as in Fig. 47C) resembles a basset hound head in frontal view. Material examined Holotype ECUADOR • ♀; 6–8 mi. SE of Baños, N slope of Mt Tungurahua; [1°24′59″ S, 78°25′33″ W]; 13 Feb. 1955; E.S. Schlinger and E.S. Ross leg.; CAS9119044. Paratype ECUADOR • 1 ♀; same data as for holotype; CAS9119045. Description Female (holotype – CASENT9119044) COLORATION. Cephalothorax brown. Legs red-brown with tibiae, metatarsi and tarsi yellow. Abdomen gray with dorsal anterior border brown (Fig. 47A). Sternum with deep sternal excavations (Fig. 47B). MEASUREMENTS. Total length 6.70. Carapace 2.69 long, 2.07 wide. Clypeus 0.21. Leg measurements: I: femur 2.13/ patella 0.91/ tibia 1.94/ metatarsus 1.76/ tarsus 1.00/ total 7.74; II: 2.03/ 0.92/ 1.77/ 1.61/ 0.96/ 7.29; III: 1.95/ 0.82/ 1.53/ 1.70/ 0.93/ 6.93; IV: 2.43/ 0.99/ 2.26/ 2.58/ 1.05/ 9.31. Eye diameters: AME 0.19, ALE 0.17, PME 0.15, PLE 0.17. Chelicerae 1.19 long, with four promarginal teeth and five retromarginal denticles. LEG SPINATION. I – femur d1-1-0, p0-0-1, r0; tibia d0, p0, r0, v2-2-2; metatarsus d0, p0, r0, v2-2-0. II – femur d1-1-0, p0, r0; tibia d0, p0, r0, v2-2-2; metatarsus d0, p0, r0, v2-2-0. III – femur d1-1-0, p0, r0; tibia d0, p1-1-0, r1-1-0, v1p-2-2; metatarsus d0, p1-1-0, r1-1-0, v2-2-1. IV – femur d1-1-1, p0-1-1, r0; tibia d0, p1-1-0, r1-1-0, v1p-2-2; metatarsus d0, p1-1-0, r1-1-0, v2-2-1. EPIGYNUM. CO slit-shaped, disposed posteriorly in relation to spermathecae, CO large (as wide as the distance between the CO and the posterior margin of the epigynal plate), placed on the posterior half of the epigynal plate, VEP absent, PVP as wide as two times the distance between the anterior and posterior margins, PVP not covering SI, copulatory duct relatively short with large branches pointed anteriorly (Fig. 47C–F). Distribution Known only from the type locality (Fig. 50).
Authors: Xavier, Cláudia, Brescovit, Antonio D., Bonaldo, Alexandre B.
Institutions: Museu Paraense Emílio Goeldi, Instituto Butantan
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7082260237
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