Langelurillus lacteus Caleb 2017, sp. nov.
Creators: name: Caleb, John T. D.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Langelurillus
Langelurillus lacteus

description: Langelurillus lacteus sp. nov. Sanap, Joglekar & Caleb
Figs 1 A –B, 2 A –D, 3 A –D, 6 A –B, 7, 8, 9 A –B
Type material: Holotype: Male (NCBS-AW249) from Aarey Milk Colony (19°08'37.4922"N, 72°52'51.459"E), alt. 61 m, Mumbai, Maharashtra, India, 20 June 2016, leg. Rajesh V. Sanap. Paratypes (same data as holotype): 2 males (NCBS-AW250–251).
Etymology. The specific name refers to the transverse ‘milky-white’ band of hairs behind the anterior eye row (Figs 1 A –B).
Diagnosis. Species resembles L. furcatus Wesołowska & Russell-Smith, 2000 in male palpal morphology. However, it can be easily distinguished by the general body color pattern; white stripe of hairs just behind the anterior eye row and fawn abdomen (Figs 1 A –B) (uniformly dark in L. furcatus); with two RTA bent ventrally; RTA 1 (ventralmost apophysis) with broader and rounded apex; dorsal edge of RTA 1 with indentation; RTA 2 (dorsalmost apophysis) stout (Figs 3B, 6B) (RTA 2 long and flattened in L. furcatus).
Description. Male (holotype, Figs 2 A –D, 3 A –D, 6 A –B). Total length: 4.03, carapace: 2.15 long, 1.61 wide; abdomen: 1.88 long, 1.38 wide. Carapace dark, covered with dark brown hairs; a pair of thin longitudinal white stripes extends from behind the ALEs and end at posterior slope (Figs 1 A –B, 2 A, 2C). Anterior eyes surrounded by orangish orbital setae, except the anterior region which is lined by white orbital setae. Short brown hairs clothe the clypeal region (Figs 1B, 2D); broad patch of white hairs extend backwards on the lateral outer margins of the carapace; outer edge of carapace lined by thin stripe of white hairs. Eye measurements: AME 0.42, ALE 0.29, PME 0.09, PLE 0.23, AME–AME 0.04; AME–ALE 0.02; ALE–PME 0.44; PME–PME 1.29; PME–PLE 0.16; PLE– PLE 1.11. Clypeus height 0.24. Sternum oval, yellowish with dark pigmentation seen medially (Fig. 2B). Chelicerae without any teeth; labium and maxillae yellowish. Legs I–II yellowish; III–IV with brownish annulations at proximal region of each article from femur to tarsus (Figs 1 A –B); ventral region of coxae and proximal femora covered with dense bristles (Fig. 2B). Leg measurements: I 2.88 (1.03, 0.63, 0.61, 0.36, 0.25); II 2.74 (0.95, 0.65, 0.57, 0.32, 0.25); III 3.95 (1.47, 0.66, 0.75, 0.62, 0.45); IV 3.48 (1.17, 0.49, 0.67, 0.65, 0.48). Leg formula: 3412. Leg spination: femur I 0400; II 0 500, III 1 400, IV 0300; patella IV 1010; tibia I 1003, II 1001, III 3122, IV 3132; metatarsus I 1004, II 1004, III 2025, IV 2032. Abdomen oval; reddish brown dorsally with paler whitish hairs making indistinct spots mid-dorsally; venter of abdomen yellowish (Figs 2 A –B). The anterior pair of spinnerets yellowish; posterior pair dark brown (Fig. 2 A). Palps covered with short pale yellowish hairs; embolus coiled, thin; RTA 1 broad with a translucent, less sclerotized blunt tip; RTA 2 stout, canine-like, curving inwards; VTA blunt, protruding prolaterally (Fig. 3 A).
Female. Unknown.
Distribution. India: Maharashtra.
description: Published as part of Caleb, John T. D., 2017, Two new species of Langelurillus Próchniewicz, 1994 from India (Araneae: Salticidae: Aelurillina), pp. 135-146 in Zootaxa 4318 (1) on pages 136-142, DOI: 10.11646/zootaxa.4318.1.6, http://zenodo.org/record/885724