Ilargus serratus, Zhang, Jun-Xia & Maddison, Wayne P., 2012

Zhang, Jun-Xia & Maddison, Wayne P., 2012, New euophryine jumping spiders from Central and South America (Araneae: Salticidae: Euophryinae), Zootaxa 3578, pp. 1-35 : 21

Ilargus serratus sp. nov.

Figs 84–91

Type material. Holotype: male, ECUADOR: Morona Santiago: km 13 from Limón towards Gualaceo, 3.0093° S, 78.4939° W, elev. 1750 m, 12 July 2004, coll. Maddison, Agnarsson, Iturralde, Salazar, WPM#04–034 (UBC-SEM AR00156, QCAZ). Paratypes: 1 female, same data as holotype (UBC-SEM AR00157); 1 female, same data as holotype.

Etymology. Latin adjective serratus (serrated), referring to the serrated edge of the retrolateral tibial apophysis of the male palp.

Diagnosis. Similar in the markings to Ilargus coccineus Simon (see Edwards et al. 2005), but can be distinguished by the less elongated body ( Figs 84–85 ); the swollen part at the beginning of the copulatory duct ( Fig. 91 ); the wider and branched embolus, and the serrated retrolateral tibial apophysis of the male palp ( Figs 86–87 ).

Description. Male (holotype, UBC-SEM AR00156). Carapace length 1.7; abdomen length 2.1. Chelicera: pale yellow. Palp ( Figs 86–87 ): yellowish to yellow brown with gray pigment. Palpal bulb wide; embolus long and coiled for less than a circle, branched from the base; retrolateral tibial apophysis finger-like with dorsal margin serrated; ventral tibial bump absent. Measurements of legs: I 4.6, II 3.7, III 4.4, IV 4.3. Color in alcohol ( Fig. 84 ): carapace yellowish, with two dark brown wide stripes from anterior eyes to posterior end of carapace; abdomen yellowish, with two lateral dark brown stripes from anterior margin to posterior margin; first pair of legs yellow brown, other legs yellowish.

Female (paratype, UBC-SEM AR00157). Carapace length 2.2 (variation 2.0–2.2, n=2); abdomen length 2.2. Chelicera ( Fig. 89 ): pale yellow. Measurements of legs: I 3.6, II 3.3, III 4.2, IV 4.5. Epigynum ( Fig. 90 ): window large; median septum narrow; opening at anterior margin of window. Vulva ( Fig. 91 ): copulatory duct thick, swollen at the beginning; spermatheca oval. Color in alcohol ( Fig. 85 ): paler than that of male, stripes on carapace light orange, stripes on abdomen gray brown, all legs pale yellow.

Figures

FIGURES 84 – 91. Ilargus serratus sp. nov. 84 male holotype, dorsal view; 85 female paratype, dorsal view; 86 male left palp, ventral view; 87 male left palp, retrolateral view; 88 female carapace, dorsal view; 89 female left chelicera, back view; 90 epigynum, ventral view; 91 cleared epigynum, dorsal view. Scale bars: 84, 0.5 mm; 85, 1.0 mm; 86 – 91, 0.2 mm.