Viribestus suyanensis, Zhang & Maddison, 2012

Zhang, Jun-Xia & Maddison, Wayne P., 2012, New euophryine jumping spiders from Papua New Guinea (Araneae: Salticidae: Euophryinae) 3491, Zootaxa 3491, pp. 1-74 : 60-63

Viribestus suyanensis sp. nov.

Figs 282–289

Type material. Holotype: male, PAPUA NEW GUINEA: Enga Province: Suyan Camp, Porgera , 5.4833° S, 143.1337° E, elev. 2300 m a.s.l., 28–29 July 2008, coll. W. Maddison, WPM#08-022 ( UBC-SEM AR00110 ).

Etymology. The specific epithet refers to the type locality.

Diagnosis. Male has a unique flat lateral extension on the front surface of the chelicera ( Fig. 287). Palpal bulb is wide; embolus is short, thick and slightly curved, with a lamella beside it; retrolateral tibial apophysis is large and forked ( Figs 288–289).

Description. Male (holotype, UBC-SEM AR00110). Carapace length 2.0; abdomen length 3.0. Chelicera ( Fig. 287): red brown; with two promarginal teeth and one bicuspid retromarginal tooth; front surface with a flat extension laterally. Palp ( Figs 288–289): light yellow to reddish brown. Bulb wide with retrolateral sperm duct loop almost occupying its whole width. Embolus short and lightly curved, with a distinct lamella beside it. Retrolateral tibial apophysis with two branches, tip of ventral branch round and tip of dorsal branch pointed from retrolateral view. Tibia of first leg with three pairs of ventral macrosetae; metatarsus with two pairs. Measurements of legs: I 4.8, II 3.9, III 4.1, IV 4.2. Color in alcohol ( Fig. 286): carapace pale yellow, area between PLEs light orange, with white scales in eye area; abdomen pale yellow without distinct markings; first legs yellow brown, other legs pale yellow, coxa, trochanter, femur and patella of first leg and femur of second leg with dark markings prolaterally. Body greenish when alive ( Figs 282–285).

Natural history. The holotype was found beating vegetation in a distrubed area.

Genus Xenocytaea Berry, Beatty & Prószy ń ski, 1998

Small to medium-sized spiders. Chelicera usually has two promarginal teeth and one bicuspid or unident retromarginal tooth. First tibia has two or three pairs of ventral macrosetae and first metatarsus has two pairs of ventral macrosetae. Epigynum usually has a large anterior arch and lacks distinct window. Embolus is coiled and palpal bulb is usually wide. Retrolateral tibial apophysis is long and finger-like or wide with multiple branches. Some species have a protrusion on the distal end of the tegulum.

Nine species have been reported from the Pacific Islands ( Berry et al. 1998; Patoleta 2011). An additional three new species are described here from Papua New Guinea.