Nyetnops lachonta, Sánchez-Ruiz & Brescovit & Bonaldo, 2020

Sánchez-Ruiz, Alexander, Brescovit, Antonio D. & Bonaldo, Alexandre B., 2020, Revision of the spider genus Nyetnops Platnick & Lise (Araneae: Caponiidae) with proposition of the new genus Nopsma, from Central and South America, Zootaxa 4751 (3), pp. 461-486 : 472-473

Nyetnops lachonta new species

Figure 8 A–F, J

Type. Male holotype ( MACN-AR 29097) from Concesión Forestal La Chonta (15°42’42”S 62°46’20”W), 330 m asl, Guarayos, Santa Cruz, Bolivia, 26–30.x.2010, C. Grismado, M.R. Vacaflores and M. Perez, pitfall.

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Males of N. lachonta n. sp. resembles those of N. buruti n. sp. by the length of copulatory bulb (tegulum + embolus) being more than two times the palpal tibia length ( Figs 8 B–C; 9B–C), differing by having a slender large bulb with a wider tegulum basal section ( Fig. 8J ). The strongly swollen palpal tibia, 1.8 times wider than proximal and distal portions ( Fig. 8 B–C) is also diagnostic.

Description. Male (holotype): Total length 5.5. Carapace 2.0 long, 1.7 wide. Sternum 1.7 long, 1.5 wide. Leg measurements: I: 2.70; II: 2.70; III: 2.25; IV: 3.05. Carapace orange with weakly noticeable pattern ( Fig. 8E ). Chelicerae, palps and legs orange; coxae and trochanters lighter. Endites, labium and sternum light orange. Abdomen light gray, without a remarkable pattern ( Fig. 8A ). Anal tubercle and spinnerets lighter than abdomen. Anterior legs without arolium, crista or gladius. Palp with slender large copulatory bulb, swollen at tegulum basal section and just slightly swollen at apical section ( Fig. 8J ), tegulum surface mostly smooth, embolus surface mostly covered with fine and longitudinal grooves, embolus tip beveled ( Fig. 8J ), with short projection.

Female: unknown.

Distribution. Known only from type locality in Bolivia ( Fig. 10C ).

Figures

FIGURE 8. A–F Nyetnops lachonta n. sp., male (holotype). A Habitus, dorsal view. B Left palp, prolateral view. C Left palp, retrolateral view. D Habitus, ventral view. E Prosoma, dorsal view. F Same, ventral view. G–J Copulatory bulb drawings. G Nyetnops guarani Platnick & Lise. H Nyetnops naylienae n. sp. I Nyetnops buruti n. sp. J Nyetnops lachonta n. sp. Scale bar: A, D (1mm); B–C, E–J (0.5mm). G–H and I–J share scale bars. Abbreviations: tas—tegulum apical section, tbs—tegulum basal section, e—embolus.

FIGURE 10. A–B Drawings of female genitalia, dorsal view. Scale bar: 0.25mm.A Nyetnops guarani Platnick & Lise. B Nyet- nops naylienae n. sp. C Distribution map of Nyetnops guarani Platnick & Lise (circles), Nyetnops buruti n. sp. (stars) Nyetnops lachonta n. sp. (square) and Nyetnops naylienae n. sp. (triangle). Abbreviations: as—anterior tracheal spiracles, dmr—distal margin of receptaculum, ap—anterior plate, ess—external sclerotization around spiracles, pmr—proximal margin of receptaculum, pp—posterior plate, ps—posterior tracheal spiracles, re—receptaculum, ue—uterus externus.