Pahangone mirabilis, Tanasevitch, 2018

Tanasevitch, Andrei V., 2018, A new erigonine genus and species from West Malaysia (Araneae: Linyphiidae), Raffles Bulletin of Zoology 66, pp. 408-412 : 411

Pahangone mirabilis , new species

( Figs. 1–17 )

Holotype. Male ( SMF), WEST MALAYSIA, Pahang State, Frazer’s Hill, Hemmant trail, Lady Guillemard road, 3°42′55.85″N 101°44′19.15″E, 1,275 m a.s.l., secondary forest, at night, by hand, 15.II.2015, leg. P. Jäger & T. Laufs.

Paratype. 1 female, collected together with the holotype.

Name. The specific name, mirabilis , is a Latin adjective, meaning “amazing”, “surprising”, referring the peculiar structure of the male palp.

Description. Male holotype. Total length 2.25. Carapace 0.90 long, 0.70 wide, pale brown, with a smooth and gentle elevation behind posterior row of eyes as shown in Figs. 1 and 2 . Sulci absent. Eyes slightly enlarged. Chelicerae 0.38 long, mastidion absent. Legs pale yellow. Leg I 4.68 long (1.25+0.28+1.25+1.15+0.75), IV 4.11 long (1.15+0.25+1.00+1.08+0.63). Chaetotaxy 2.2.1.1, spines very long, its length about 2.5–3.5 diameters of segment. Each metatarsus with a trichobothrium. TmI 0.49. Palp ( Figs. 10–17 ): tibia strongly modified, bearing three outgrowths differing in shape. Cymbium with a posterodorsal conical extention bent backwards. Paracymbium massive, its distal part with a ventral keel-shaped lobe. Distal suprategular apophysis strongly developed and sclerotised. Its distal part bent and surrounding the embolic division. Radix membranous. Embolus relatively short, bent at base, gradually broadening distad. Median membrane small, poorly-visible. Abdomen 1.38 long, 0.80 wide, dorsal pattern as shown in Fig. 2 .

Female. Total length 2.30. Carapace slightly prominent dorsally as shown in Fig. 5 ; 0.80 long, 0.68 wide, pale brown. Chelicerae 0.33 long. Legs pale yellow. Leg I 4.10 long (1.15+0.20+1.05+1.00+0.70), IV 3.88 long (1.15+0.20+0.95+1.00+0.58). Chaetotaxy: spines mostly lost, but should be same as in male. Each metatarsus with a trichobothrium. TmI 0.48. Abdomen 1.53 long, 1.10 wide, dorsal pattern as shown in Fig. 3 . Epigyne convex, cavity covered with an elongated, dark median plate ( Figs. 5–9 ). Receptacles elongated, translucent on each side of epigynal plate.

Distribution. Known from the type locality, Frazer’s Hill, in the Malay Peninsula, West Malaysia.

Figures

Figs. 1–9. Pahangone mirabilis, new species, male holotype (1, 2) and female paratype (3–9). 1, 2, 5, body, lateral (1, 5) and dorsal (2) views; 3, 4, abdomen, dorsal and ventral views, respectively; 6, 7, epigyne, ventral view, different aspects; 8, 9, epigyne, lateral and posteroventral views, respectively.

Figs. 10–17. Palp of Pahangone mirabilis, new species, male holotype. 10, right palp, retrolateral view; 11, 12, palpal tibia and paracymbium, lateral and retrolateral views, respectively; 13, 14, palpal tibia, posterodorsal and dorsal views, respectively; 15, distal suprategular apophysis, lateral view; 16, distal suprategular apophysis and embolus, lateral view; 17, distal suprategular apophysis and embolic division, anterolateral view.