Stenaelurillus furcatus Wesolowska 2014
Creators: name: Logunov, Dmitri V.
name: Azarkina, Galina N.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Stenaelurillus
Stenaelurillus furcatus

description: Stenaelurillus furcatus Wesołowska, 2014
Figs 20–21, 119–135, 511
Stenaelurillus furcatus Wesołowska, 2014b: 601, fig. 3A–G (D♂ ♀); ♂ holotype in BMNH, not examined.
Diagnosis
The males of S. furcatus can easily be distinguished from those of all other species of Stenaelurillus by the unique bifurcated RTA, the finger-shaped, pointed distal projection and the hook-shaped embolus (Figs 120, 122); only the male of S. jagannathae from India has a similar conformation of the embolus (cf. Vidhel et al. 2015: figs 3–11). The female of S. furcatus is most similar to that of S. guttiger (Figs 227–230), from which it differs in having a much wider epigynal pocket situated right between the copulatory openings (disposed proximally in S. guttiger) and visibly narrower insemination ducts and primary receptacles. The female of S. furcatus is also similar to those of S. latibulbus and S. kavango (cf. Figs 334–335 and Wesołowska 2014b: fig. 5), but differs in the shape and proportions of the insemination ducts and the primary spermathecae (Figs 126–127).
Material examined
NAMIBIA: 8 ♂♂, 1 ♀, Etosha National Park, 18°51′20.1″ S, 16°19′45.5″ E, Mar. 1999, A. Russell-Smith leg. (MRAC 215.642).
Description
Male
Measurements: carapace: 2.20–2.40 long, 1.50–1.75 wide, 1.05 high. Abdomen: 1.70–2.30 long, 1.65– 1.70 wide. Ocular area: 0.90 long, 1.35 wide anteriorly, 1.30 wide posteriorly. Cheliceral length 0.60. Clypeal height 0.25–0.30. Diameter of AME 0.35–0.40. Length of leg segments: I 1.10 + 0.60 + 0.65 + 0.45 + 0.45 (3.25); II 1.15 + 0.70 + 0.70 + 0.60 + 0.60 (3.75); III 1.70 + 0.90 + 1.15 + 1.35 + 0.60 (5.70); IV 1.50 + 0.90 + 1.10 + 1.45 + 0.70 (5.65). Leg formula III,IV,II,I. Leg spination: I: Fm d 0-1-1-5; Pt pr 1; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 0-1ap, v 2-2ap. II: Fm d 0-1-2-5; Pt pr 1; Tb pr 1-1, v 1-1- 2ap; Mt pr and rt 1-1ap, v 2-2ap. III: Fm d 1-2-5; Pt pr and rt 1; Tb d 1-0-0, pr and rt 1-1-1-1, v 0-1-2ap; Mt d 2-1-0, pr and rt 1-0-2ap, v 0-2-2ap. IV: Fm d 1-1-5; Pt pr and rt 1; Tb d 1-0-0, pr and rt 1-1-1-1, v 1-0-2ap; Mt d 2-1-0, pr 1-1-2ap, rt 1-0-2ap, v 1-2-2ap. Coloration (in alcohol; Figs 132–135). Carapace brown, covered with long dark brown recumbent scales, laterally with wide marginal stripes of white scales, dorsally with two longitudinal stripes of white scales starting from PMEs and running to the rear end of the carapace. Sternum yellow. Endites and labium yellow. Chelicerae dark brown, sparsely covered with long white hairs. Clypeus and cheeks brown, sparsely covered with long white hairs. Abdomen: dorsum brown, covered with dark brown recumbent scales, medially with a longitudinal stripe of white hairs; venter grey-yellow. Book-lung covers yellow. Spinnerets yellow, with brownish
(the ventral pair) to dark brown (the dorsal pair) tips. All legs yellow. Coxae II ventrally with dark brown spots. All Fm ventro-proximally with dark brown spots, which are poorly marked on legs I and IV in some specimens. All Pt ventrally with dark brown spots (poorly marked in some specimens). Tb, Mt and Tr I brown, covered with dark brown hairs. Tb II ventrally covered with dark brown hairs. Palps yellow, but Fm sparsely covered with long white hairs; Fm prolatero-distally, Tb and the proximal part of cymbium prolaterally covered with dark brown hairs. Palpal structure as in Figs 119–125: VTA bulgeshaped; RTA bifurcated, claw-like; the cymbium simple, without a cymbial lateral process; the tegulum small, poorly marked, without a tegular process; the functional tegulum elongated, with well-developed, pointed proximal (PP) and finger-shaped distal (DP) projections; the embolus thick, hook-shaped, with a heavy elongated base having a short projection directed distad.
Female
Measurements: carapace: 2.50 long, 2.15 wide, 1.50 high. Abdomen: 3.50 long, 2.55 wide. Ocular area: 1.00 long, 1.45 wide anteriorly, 1.40 wide posteriorly. Cheliceral length 0.65. Clypeal height 0.35. Diameter of AME 0.40. Length of leg segments: I 1.15 + 0.70 + 0.60 + 0.50 + 0.45 (3.40); II 1.20 + 0.75 + 0.65 + 0.55 + 0.45 (3.60); III 2.00 + 1.00+ 1.40 + 1.55 + 0.65 (6.60); IV 1.80 + 0.80 + 1.30 + 1.70 + 0.70 (6.30). Leg formula III,IV,II,I. Leg spination: I: Fm d 0-1-1-5; Pt pr 1; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 0-1ap, v 2-2ap. II: Fm d 0-1-2-5; Pt pr 1; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 0-1ap, v 2-2ap. III: Fm d 1-2-5; Pt pr and rt 1; Tb d 1-0-0, pr and rt 1-1-1-1, v 1-0-2ap; Mt d 2-1-0, pr and rt 1-0-2ap, v 0-2-2ap. IV: Fm d 1-1-4; Pt pr and rt 1; Tb d 1-0-0, pr and rt 1-1-1-1, v 1-0-2ap; Mt d 2-1-0, pr 1-1-2ap, rt 1-0-2ap, v 1-2-2ap. Coloration (in alcohol; Figs 128–131) as in the male. All legs yellow. Coxae without spots. Fm I and II prolaterally with a dark brown spot and retrolaterally with a small proximal dark brown spot. Fm III with small pro- and retrolateral proximal dark brown spots. Tb I and II prolaterally with two dark brown spots (proximal and distal). Fm III and IV dorsally with proximal and distal spots of dark brown scales. Tb IV with proximal and distal spots of dark brown scales. Palps yellow, but palpal Fm with a poorly marked prolateral brown spot. Epigyne and spermathecae as in Figs 126–127: the epigynal plate flat, without visible structures; epigynal pocket present, wide, cone-shaped, situated between the large ovoid, widely separated copulatory openings; the insemination ducts relatively short, tube-shaped, forming C-shaped figures; the primary spermathecae medium-sized and round.
Distribution
A few localities in Namibia (Fig. 511) (Wesołowska 2014b; present data).
description: Published as part of Logunov, Dmitri V. & Azarkina, Galina N., 2018, Redefinition and partial revision of the genus Stenaelurillus Simon, 1886 (Arachnida, Araneae, Salticidae), pp. 1-126 in European Journal of Taxonomy 430 on pages 34-37, DOI: 10.5852/ejt.2018.430, http://zenodo.org/record/3787622