Stenaelurillus furcatus Wesołowska, 2014

Logunov, Dmitri V. & Azarkina, Galina N., 2018, Redefinition and partial revision of the genus Stenaelurillus Simon, 1886 (Arachnida, Araneae, Salticidae), European Journal of Taxonomy 430, pp. 1-126 : 34-37

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).

Figures

Figs 14–29. Tarsal claws of legs 1 in females of Stenaelurillus Simon, 1886, scanning electron micrographs. 14–15. S. nigricaudus Simon, 1886. 14. Retrolateral. 15. Prolateral. 16–17. S. guttatus (Wesołowska & Cumming, 2002) comb. nov. 16. Retrolateral. 17. Prolateral. 18–19. S. termitophagus (Wesołowska & Cumming, 1999) comb. nov. 18. Retrolateral. 19. Prolateral. 20–21. S. fuscatus Wesołowska & Russell-Smith, 2000. 20. Retrolateral. 21. Prolateral. 22–23. S. guttiger (Simon, 1901). 22. Retrolateral. 23. Prolateral. 24–25. Aelurillus v-insignitus (Clerck, 1757). 24. Retrolateral. 25. Prolateral. 26–27. Phlegra fasciata (Hahn, 1826). 26. Retrolateral. 27. Prolateral. 28–29. Langona bristowei Berland & Millot, 1941. 28. Retrolateral. 29. Prolateral. Scale bars: 0.1 mm.

Figs 119–127. Stenaelurillus furcatus Wesołowska, 2014 from Namibia (Etosha National Park; MRAC 215.642). 119. Male palp, retrolateral view. 120. Male palp, ventral view. 121–124. Embolic division. 121. Retrolateral view. 122. Dorsal view. 123. Ventral view. 124. Median view. 125. RTA, retrolateral view. 126. Epigyne, ventral view. 127. Spermathecae, dorsal view. Abbreviations: see Material and methods. Scale bars: 0.1 mm.

Figs 128–135. Stenaelurillus furcatus Wesołowska, 2014 from Namibia (Etosha National Park; MRAC 215.642), general appearance. 128–131. ♀. 132–135. ♂. Scale bars: 1 mm.

Figs 227–238. Stenaelurillus guttiger (Simon, 1901), ♀♀. 227, 229. Epigyne, ventral view. 228, 230. Spermathecae, dorsal view. 231–238. General appearnce. Specimens: 227–228, 235, 238 from South Africa (Ndumo GR; NCA 2006/1275); 229–230, 232 from South Africa (Kruger NP, Satara; NCA 2008/2001); 231 from South Africa (Kruger NP, Pafuri; NCA 2007/2474); 233–234, 236–237 from South Africa (Kruger NP, Oliphants; NCA 2009/3738). Scale bars: 227–230 = 0.1 mm; 231–238 = 1 mm.

Figs 330–335. Stenaelurillus latibulbis Wesołowska, 2014, ♀ from Zambia (Luambe). 330–333. General appearance. 334. Epigyne, ventral view. 335. Spermathecae, dorsal view. Abbreviations: see Material and methods. Scale bars: 330–333 = 1 mm; 334–335 = 0.1 mm.

Fig. 511. Collecting localities of six African species of Stenaelurillus Simon, 1885.