Stenaelurillus tettu, Logunov, 2020

Logunov, Dmitri V., 2020, Further notes on the genus Stenaelurillus Simon, 1885 from India (Araneae Salticidae), Zootaxa 4899 (1), pp. 201-214 : 207-210

Stenaelurillus tettu sp. nov.

Figures 15–27

Etymology. The specific epithet is a noun in apposition taken from the type locality, the settlement Tettu in Andhra Pradesh, India.

Diagnosis. In the conformation of the embolic division and the medio-prolateral position of the ventral tibial apophysis ( Figs 23, 24 ), the male of S. tettu sp. nov. is most similar to that of S. specularis Wesołowska, 2014 from Malawi (cf. figs 11B,E in Wesołowska 2014b), but can be easily distinguished by the S-shaped embolus ( Fig. 24 ; straight in S. specularis ), the wider and straight tegular process ( Fig. 23 ; narrow and bent medially in S. specularis ), and the long and wide retrolateral tibial apophysis bent apicad ( Fig. 25 ; narrow and bent retrolaterad in S. specularis ). The female of S. tettu sp. nov. is most similar to those of the Indian S. gabrieli Prajapati, Murthappa, Sankaran & Sebastian, 2016 (cf. figs 4A–C in Prajapati et al. 2016) and S. metallicus Caleb & Mathai, 2016 (cf. figs 21, 22 in Caleb & Mathai 2016) but can be distinguished from both by the triangular epigynal plate overhanging the epigastric furrow by its proximal, pointed edge ( Fig. 26 ; straight proximal edge, not extending beyond the epigastric furrow in both similar species). The shape of the two-chambered, twisted receptacles is very similar in all three species.

Description. Male (Holotype, ZMMU Ta-8126, Figs 15–18 , 23–25 ). Measurements. Carapace: 2.10 long, 1.50 wide, 1.05 high. Abdomen: 2.00 long, 1.30 wide. Ocular area: 1.05 long, 1.40 wide anteriorly, 1.38 wide posteriorly. Cheliceral length 0.43. Clypeal height 0.16. Diameter of AME 0.39. Length of leg segments: I 1.15 + 0.55 + 0.63 + 0.55 + 0.45 (3.33); II 1.05 + 0.50 + 0.55 + 0.50 + 0.45 (3.05); III 1.50 + 0.75 + 0.95 + 1.15 + 0.45 (4.80); IV 1.40 + 0.63 + 0.90 + 1.25 + 0.50 (4.68). 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 1-2-2ap; Mt pr and rt 1ap, v 2-2ap. II: Fm d 0-1-2-5; Pt pr and rt 0-1-0; Tb pr 1-1, rt 1-0, v 1-1-2ap; Mt pr and rt 1-1ap, v 2-2ap. III: Fm d 0-1-1-5; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1-1, v 1-2ap; Mt d 1-1, pr and rt 1- 1-2ap, v 0-2-2ap. IV: Fm d 0-1-1-5; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1-1, v 1-2ap; Mt d 1-0, pr and rt 1-1-2ap, v 0-2-2ap. Colouration (in alcohol; Figs 15–18 ): Carapace brownish yellow, densely covered with recumbent scales forming colour pattern, eye field and thoracic region dark brown, central part yellowish brown, two longitudinal white stripes running behind PLEs, two wide yellow marginal bands laterally. Clypeus brown. Sternum, endites, and labium light yellow. Chelicerae brownish yellow. Abdomen: dorsum brown, with symmetrical pattern of white spots, as in Fig. 15 ; sides light yellow, with dark brown longitudinal lines; venter light yellow, with sparse brown speckles. Book-lung covers light yellow. Spinnerets yellow, tinged with grey. All legs light yellow, but femora I with transverse black stripe prolaterally, tarsi I and II with black tips ( Fig. 18 ). Palps light yellow, with brown retrolateral tibial apophyses. Palpal structure as in Figs 23–25 : femur without ventral bulge; ventral tibial apophysis present, triangular, situated prolaterally of tibia and directed apico-prolaterad; retrolateral tibial apophysis wide, blade-shaped, directed anteriad; dorsal tibial apophysis absent; cymbium elongated, 1.6 times longer than wide, without retrolateral ridge or process; tegular process wide and obtuse, as long as embolus; salticid radix shaped as an inverted drop, with proximal projection bent prolaterad, with obtuse, poorly-developed distal projection; embolus S-shaped.

Female (Paratype, ZMMU Ta-8127, Figs 19–22 , 26, 27 ). Measurements. Carapace: 2.60 long, 1.90 wide, 1.25 high. Abdomen: 2.80 long, 1.80 wide. Ocular area: 1.05 long, 1.53 wide anteriorly, 1.45 wide posteriorly. Cheliceral length 0.60. Clypeal height 0.25. Diameter of AME 0.40. Length of leg segments: I 1.25 + 0.65 + 0.65 + 0.50 + 0.40 (3.45); II 1.35 + 0.55 + 0.65 + 0.60 + 0.45 (3.60); III 2.05 + 0.98 + 1.30 + 1.55 + 0.55 (6.43); IV 1.80 + 0.80 + 1.23 + 1.55 + 0.70 (6.08). Leg formula IV,III,II,I. Leg spination: I: Fm d 0-1-1-5; Pt pr 0-1-0; Tb pr 1-1, v 1-1-2ap; Mt pr and rt 1ap, v 2-2ap. II: Fm d 0-1-1-5; Pt pr 0-1-0; Tb pr 1-1, v 1-1-2ap; Mt pr 1-1, v 2-2ap. III: Fm d 0-1-1-5; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1-1, v 1-2ap; Mt d 1-1-0, pr and rt 1-1-2ap, v 1-1-2ap. IV: Fm d 0-1-1-5; Pt pr and rt 0-1-0; Tb d 1-0, pr and rt 1-1-1-1, v 1-2ap; Mt d 1-1-0, pr and rt 1-1-2ap, v 1-1-2ap. Colouration (in alcohol; Figs 19–22 ): Carapace yellow, densely covered with brown recumbent scales; eye field dark brown, two longitudinal, dorsal (running behind PLEs) and marginal yellow stripes laterally. Clypeus brownish yellow. Abdomen: dorsum orange-brown, with two symmetrical white spots in posterior half ( Fig. 20 ); sides yellow, with orange lines; venter light yellow, with sparse orange speckles. Book-lung covers and spinnerets light yellow. All legs yellow, with orange and brownish patches dorsally and retrolaterally on tibiae III and IV; femora I brown anteriorly. Palps light yellow. Epigyne and vulva as in Figs 26, 27 : epigynal plate flat, triangular, its proximal end extended over epigastric furrow; copulatory openings round, widely separated (by more than three diameters); insemination ducts very short and wide, connecting receptacles almost directly to copulatory openings; receptacles twisted, making 1.5 revolutions; fertilization ducts prominent, situated at apical ends 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-8126).

Paratypes: Same data as holotype, 9³ 8♀ ( ZMMU, Ta-8127), 2³ 2♀ ( ISEA, 001.8547), 2³ 2♀ ( MMUE, G7644.2 ) .

Distribution. Only the type locality ( Map 1 ).

Figures

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

FIGURES 15–22. Stenaelurillus tettu sp. nov. 15–18 Body of ³ holotype (15 dorsal, 16 lateral, 17 ventral, 18 frontal view); 19–22 Body of ♀ paratype (19 frontal, 20 dorsal, 21 lateral, 22, ventral view). Scale: 1 mm.

FIGURES 23–27. Stenaelurillus tettu sp. nov. 23–25 Palp of ³ holotype (23 Palp ventral view, 24 embolic division, dorsal view, 25 palp, retrolateral view); 26–27 ♀ paratype (26 epigyne, ventral view, 27 vulva, dorsal view). Scales: 0.1 mm.Abbrevia- tions: DP—distal projection, E—embolus, RTA—retrolateral tibial apophysis, T—tegulum, TP—tegular process, VTA—ventral tibial apophysis.