Stenaelurillus indicus, Logunov, 2020

Logunov, Dmitri V., 2020, Further notes on the genus Stenaelurillus Simon, 1885 from India (Araneae Salticidae), Zootaxa 4899 (1), pp. 201-214 : 202-204

Stenaelurillus indicus sp. nov.

Figures 1–9

Etymology. The specific epithet is a Latin adjective meaning Indian.

Diagnosis. The hook-shaped, sclerotized embolus ( Figs 5, 6 ) of Stenaelurillus indicus sp. nov. is most similar to that of S. marusiki Logunov, 2001 from southwestern Iran (cf. figs 27–29 in Logunov 2001). It can be distinguished by a distal projection that is half the length of the embolus (as long as the embolus in S. marusiki ) and the wide, transverse embolic base that is 5–6 times wider than the embolus (less than two times as wide in S. marusiki ). The males of both species also differ in the body colouration: viz., the wide, longitudinal brown stripe present on the dorsum of S. marusiki (fig. 30 in Logunov 2001) but absent in S. indicus sp. nov. ( Fig. 1 ). The female of S. indicus sp. nov. is most similar to that of S. lesserti Reimoser, 1934 (cf. Figs 8, 9 and 13, 14 ), from which it differs in the absence of the epigynal pocket (present in S. lesserti ) and in having two-chambered receptacles (one-chambered in S. lesserti ).

Description. Male (Holotype, ZMMU Ta-8124, Figs 1–7 ). Measurements. Carapace: 2.10 long, 1.55 wide, 1.10 high. Abdomen: 2.15 long, 1.45 wide. Ocular area: 1.05 long, 1.35 wide anteriorly, 1.28 wide posteriorly. Cheliceral length 0.55. Clypeal height 0.18. Diameter of AME 0.35. Length of leg segments: I 1.15 + 0.55 + 0.70 + 0.55 + 0.50 (3.45); II 1.05 + 0.55 + 0.60 + 0.55 + 0.45 (3.20); III 1.70 + 0.78 + 1.08 + 1.25 + 0.50 (5.31); IV 1.45 + 0.60 + 1.00 + 1.28 + 0.70 (5.03). Leg formula III,IV,I,II. Leg spination: I: Fm d 0-1-1-5; Pt pr 0-1-0; Tb pr 1-1, v 1-1-2ap; Mt v 2-2ap. II: Fm d 0-1-2-5; Pt pr 0-1-0; Tb pr 2-2, rt 0-1-0; v 1-1-2ap; Mt pr and rt 1-1ap, v 2-2ap. III: Fm d 0-1- 2-5; Pt pr and rt 0-1-0; Tb d 1-0-0, pr and rt 1-2, v 1-0-2ap; Mt d 1-1-0, pr and rt 1-1-2ap, v 2ap. IV: Fm d 0-1-2-5; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-2, v 1-2ap; Mt d, pr and rt 1-1-2ap. Colouration (in alcohol; Figs 1–4 ): Carapace yellow, densely covered with recumbent scales creating colour pattern: two longitudinal white stripes running behind PLEs, dark brown thoracic region, whitish brown eye field, and two wide, yellow marginal bands on sides of carapace. Clypeus yellowish brownish, densely covered with white setae. Sternum, endites and labium light yellow. Chelicerae yellow, slightly tinged with brown. Abdomen: dorsum orange, with dark brown patch consisting of transverse stripes in posterior quarter; sides and venter light yellow. Book-lung covers light yellow. Spinnerets long, yellow, dorsal pair with grey-brown tips. Legs I yellow, with dark brown prolateral stripes on femora and black tarsi. Legs II–IV: yellow, with light brownish tint. Palps yellow, cymbium yellow-orange. Palpal structure as in Figs 5–7 : femur without ventral bulge; ventral tibial apophysis present, triangular, with smoothly rounded tip directed apicad; retrolateral tibial apophysis hook-shaped, directed anteriad; dorsal tibial apophysis absent; cymbium elongated, about 1.7 times longer than wide, with low retrolateral ridge; tegular process short and obtuse; salticid radix shaped as an inverted droplet, with straight proximal projection and short, obtuse distal projection; embolus with wide, transverse base and hook-shaped, sclerotized body.

Female (Paratype, ZMMU Ta-8125, Figs 8–9 ). Measurements. Carapace: 2.50 long, 1.75 wide, 1.15 high. Abdomen: 2.65 long, 1.75 wide. Ocular area: 1.05 long, 1.50 wide anteriorly, 1.45 wide posteriorly. Cheliceral length 0.78. Clypeal height 0.23. Diameter of AME 0.40. Length of leg segments: I 1.20 + 0.65 + 0.65 + 0.55 +

0.50 (3.55); II 1.20 + 0.65 + 0.60 + 0.55 + 0.45 (3.45); III 1.80 + 0.85 + 1.10 + 1.30 + 0.50 (5.55); IV 1.65 + 0.75 + 1.05 + 1.30 + 0.70 (5.45). Leg formula III,IV,I,II. Leg spination: I: Fm d 0-1-5; Pt pr 0-1-0; Tb pr 0-1, v 2-2ap; Mt pr 1ap, v 2-2ap. II: Fm d 0-2-4; Pt pr 0-1-0; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1ap, rt 1ap, v 2-2ap. III: Fm d 0-1-1-5; Pt pr and rt 0-1-0; Tb d 1-0-0, pr and rt 1-2-1, v 1-2ap; Mt d 2-1, pr 1-2ap, v 0-2-2ap. IV: Fm d 0-1-1-2; Pt pr and rt 0-1-0; Tb d 1-0-0, pr and rt 1-2-1, v 1-2ap; Mt d 1-0-0, pr, rt and v 1-1-2ap. Colouration (in alcohol): Carapace yellow, densely covered with brown recumbent scales, with two longitudinal white stripes running behind PLEs and wide yellow marginal bands on both sides. Clypeus yellowish brownish. Sternum, endites, and labium light yellow. Chelicerae yellow, tinged with brown. Abdomen: dorsum dark brown, with three small, white spots in posterior half, forming an inverted triangle; sides yellowish brown; venter yellow, with sparse brown speckles. Book-lung covers yellow. Spinnerets yellowish grey. All legs yellow, with prolateral brown stripes on femora and brown patches and rings at joints. Palps light yellow. Epigyne and vulva as in Fig. 8 : epigynal plate flat, square, with pair of cap-shaped copulatory openings situated near epigastric furrow, separated by about two diameters; epigynal pocket absent; insemination ducts short, narrow, directed anteriad; receptacles large, markedly two-chambered; fertilization ducts prominent, situated apically of receptacles.

Type material. Holotype ³ INDIA: Andhra Pradesh: Tettu , 15.041°N, 80.007°E, leg. K. Tomkovich, 6– 12.III.2014 ( ZMMU, Ta-8124).

Paratypes: same data as for holotype, 2³ 4♀ ( ZMMU, Ta-8125), 1³ 1♀ ( ISEA, 001.8546), 1³ 1♀ ( MMUE, G7644.1 ) .

Distribution. Only the type locality ( Map 1 ).

Figures

MAP 1. Type localities of three Stenaelurillus species from India.

FIGURES 1–9. Stenaelurillus indicus sp. nov. 1–4 Body of ³ holotype (1 dorsal, 2 lateral, 3 ventral, 4 frontal); 5–7 Palp of ³ holotype (5 embolic division, dorsal view, 6 palp, ventral view, 7 same, retrolateral view); 8–9 ♀ paratype (8 epigyne, ventral view, 9 vulva, dorsal view). Scales: 1 mm (1–5), 0.1 mm (5–9). Abbreviations: DP—distal projection, E—embolus, EB—embolic base, PP—proximal projection, RTA—retrolateral tibial apophysis, T—tegulum, VTA—ventral tibial apophysis.

FIGURES 10–14. Stenaelurillus lesserti Reimoser, 1934 from India (Andhra Pradesh). 10–12 Male palp (10 ventral view, 11 retrolateral view, 12 embolic division, dorsal view); 13 Epigyne, ventral view; 14 Vulva, ventral view. Scale: 0.1 mm. Abbreviations: DP—distal projection, E—embolus, RTA—retrolateral tibial apophysis, T—tegulum, VTA—ventral tibial apophysis.