Stenaelurillus metallicus , Caleb, John T. D. & Mathai, Manu Thomas, 2016

Caleb, John T. D. & Mathai, Manu Thomas, 2016, A new jumping spider of the genus Stenaelurillus Simon, 1886 from India (Araneae: Salticidae: Aelurillina), Zootaxa 4103 (2), pp. 185-188: 185-188

publication ID

http://doi.org/ 10.5281/zenodo.256878

publication LSID

lsid:zoobank.org:pub:D77A9E6F-FCB7-47D7-8014-12F8CAFA3C3B

persistent identifier

http://treatment.plazi.org/id/AB16879A-943C-FFC7-FF2B-FA28D9DDFB1D

treatment provided by

Plazi

scientific name

Stenaelurillus metallicus
status

sp. nov.

Stenaelurillus metallicus  sp. nov.

Figs 1–22View FIGURES 1 – 6View FIGURES 7 – 18View FIGURES 19 – 22

Type material: Holotype: Male (NCBS-AR 103) from Madras Christian College (12.917659 °N, 80.122859 °E, alt. 32 m), Chennai, Tamil Nadu, India, 21 June 2013, leg. John Caleb T.D. Paratypes (from same location): 1 male (NCBS- AR 110), 21 June 2013; 1 male (NCBS-AR 109), 18 July 2013; 1 male & 1 female (NCBS-AR 104 & AR 113), 5 September 2013; 1 female (NCBS-AR 112), 11 November 2013; 1 male (NCBS-AR 111), 21 April 2015, all leg. John Caleb T.D.; 4 males & 4 females (NCBS-AR 105 to AR 108 & AR 114 to AR 117), 30 January 2014, leg. Karthy.

Etymology. The specific name, an adjective, refers to the shining spots with metallic sheen on the male abdomen.

Diagnosis. The male differs from all known Stenaelurillus  species by orangish abdomen, with a pair of dark spots ( Fig. 1View FIGURES 1 – 6; usually darker abdomen with white spots in other species). The species seems to be closely related to S. sarojinae Caleb & Mathai, 2014  by the presence of a well-developed ventral femoral distal process in the male palp ( Fig. 11View FIGURES 7 – 18), but differs in having a slightly bent, short and thick embolus, not accompanied by a terminal apophysis (compare Fig. 19View FIGURES 19 – 22 herein with fig. 80 in Caleb et al. 2015). The female resembles S. sarojinae  in having a pair of white spots on the abdomen, but differs in having globular spermatheca (bean-shaped in S. sarojinae  ; compare Figs 18View FIGURES 7 – 18, 22View FIGURES 19 – 22 herein with fig. 30 in Caleb & Mathai 2014).

Description. Male (holotype). Total length: 4.63; carapace: 2.37 long, 1.64 wide; abdomen: 2.26 long, 1.43 wide. Carapace dark, covered with reddish-brown hairs; a pair of thin longitudinal white stripes extending from behind the ALEs and ending at posterior slope. Posterior end of carapace blackish ( Figs 1–2View FIGURES 1 – 6). AMEs surrounded by white orbital setae. Short white hairs clothe the facial region from above the anterior eyes to the clypeal region ( Fig. 3View FIGURES 1 – 6). Broad patch of white hairs extend backwards on the lateral margins of the carapace. Outer edge of carapace lined by thin stripe of white hairs. Eye measurements: AME 0.36, ALE 0.21, PME 0.07, PLE 0.26, AME –AME 0.09; AME –ALE 0.12; PME –PME 1.22; PME –PLE 0.19. Sternum oval, darkly pigmented medially, yellowish along the margins ( Fig. 8View FIGURES 7 – 18). Chelicerae unident ( Fig. 9View FIGURES 7 – 18); labium and maxillae yellowish. Femur I with a black patch prolaterally ( Fig. 3View FIGURES 1 – 6). Coxae of all legs with patch of dark pigmentation ventrally ( Fig. 8View FIGURES 7 – 18). Leg measurements: I 3.99 (1.35, 0.82, 0.74, 0.58, 0.49); II 3.95 (1.37, 0.79, 0.72, 0.56, 0.51); III 5.87 (1.78, 0.84, 1.14, 1.32, 0.79); IV 5.71 (1.70, 0.80, 1.11, 1.32, 0.78). Leg spination: leg I: 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 - 2 ap; leg II: Fm d 0-1 - 1-5, pr 0-1 -0; Pt pr and rt 0-1 -0; Tb pr 1 - 1 - 1, rt 0-1 -0, v 1 - 1 -2ap; Mt pr 1 - 1, rt 1 - 1, v 2 - 0-2 ap; leg III: Fm d 0-1 - 1-5, pr 0-1 -0; Pt pr and rt 0-1 -0; Tb d 1-2 - 2, pr 1 - 1, rt 1 - 0-1, v 0-1 - 2 ap; Mt d 1-2 - 1-2, pr 1 - 1, rt 1 - 1 - 1, v 0- 0-2 ap; leg IV: Fm d 0-1 - 1-4, pr 0-1 -0; Pt pr and rt 0-1 -0; Tb d 1- 2 - 2, pr 1 - 1, rt 1 - 1, v 1-2 ap; Mt d 2 - 2 - 2, pr 1 - 1, rt 1 - 0-1, v 0-1 - 2 ap. Abdomen with dark orange hairs on the sides, paler mid-dorsally with whitish hairs making indistinct chevron shaped markings; a pair of large spots with metallic luster present on the dorsum; a pair of indistinct black spots present laterally further behind. Abdomen outlined laterally by a fringe of long white hairs; spinnerets moderately long, black ( Figs 1View FIGURES 1 – 6, 7, 10View FIGURES 7 – 18). Palp covered with short pale yellowish hairs; embolus short, thick and slightly bent, not accompanied by anterior terminal apophysis; RTA single with a broad base tapering toward the tip, slightly curved ( Figs 19–20View FIGURES 19 – 22).

Female (paratype NCBS-AR 112). Total length 4.85; carapace: 2.15 long, 1.68 wide; abdomen: 2.70 long, 2.01 wide. Eye measurements: AME 0.39, ALE 0.20, PME 0.07, PLE 0.22, AME –AME 0.06; AME –ALE 0.10; PME –PME 1.25; PME –PLE 0.19. Leg measurements: I 3.58 (1.30, 0.60, 0.61, 0.48, 0.59); II 3.65 (1.29, 0.65, 0.60, 0.54, 0.58); III 6.19 (1.97, 0.94, 1.29, 1.18, 0.81); IV 5.65 (1.67, 0.80, 1.17, 1.24, 0.77). Leg spination: leg I: Fm d 0-1 - 1-5; Pt pr 0-1 -0; Tb pr 1 - 1, v 1 - 1 -2ap; Mt pr 0-2, v 2 - 1 ap; leg II: Fm d 0-1 - 1-5, pr 0-1 -0; Pt pr 0-1 -0; Tb, pr 1 - 1, v 1 - 1 -2; Mt d 1-2, pr 0-1, v 2 - 1 ap; leg III: Fm d 0-1 - 1-5, pr 0-1 -0; Pt pr and rt 0-1 -0; Tb d 1-2 - 2, pr 1 - 1, rt 1 - 1, v 0-1 - 2 ap; Mt d 1 - 1-2, pr 1-2, rt 1 - 1-2 ap, v 0-1 - 2 ap; leg IV: Fm d 0-1 - 1-4; Pt pr and rt 0-1 -0; Tb d 1-2 - 2, pr 1 - 1, rt 1 - 1, v 1-2 ap; Mt d 2 - 1-2, pr 1 - 1, rt 1 - 1, v 0-1 - 2 ap. Coloration pattern as in male, but differs in the following: general body color dull reddish-brown ( Figs 4View FIGURES 1 – 6, 12View FIGURES 7 – 18).

Anterior eyes outlined by reddish-brown setae on the upper half and lower half with white orbital setae ( Fig. 6View FIGURES 1 – 6). A pair of white spots present on the abdomen ( Figs 4View FIGURES 1 – 6, 12View FIGURES 7 – 18). Epigyne placed on a poorly sclerotized plate; copulatory ducts short, leading to the lower chambers ( Figs 15, 16View FIGURES 7 – 18, 21View FIGURES 19 – 22); spermathecae globular ( Figs 17, 18View FIGURES 7 – 18, 22View FIGURES 19 – 22).

Distribution. Known only from type locality.