Ischnothyreus qianlongae, Tong & Li, 2008

Tong, Yanfeng & Li, Shuqiang, 2008, The Oonopid Spiders (Araneae: Oonopidae) From Hainan Island, China, Raffles Bulletin of Zoology 56 (1), pp. 55-66 : 60

Ischnothyreus qianlongae , new species

( Fig. 4A–G )

Holotype. – Male ( IZCAS), Qianlong Cave (18 ° 35'N 109 ° 25'E), Maogan Town, Baoting County, Hainan Island, China, coll. Y. Song, X. Han, G. Deng and Y. Tong, 13 Apr.2005.

Diagnosis. – The male of this new species (female unknown) is similar to I. narutomii (Nakatsudi, 1942) ( Oi, 1958; Lee, 1964), but can be distinguished by the modifications on base of cheliceral fang, the complicated membranous outgrowths on apical part of embolus, and the blackish brown sides of carapace.

Description. – Male. Body length 1.51; carapace 0.84 length, 0.65 width; abdomen 0.67 length, 0.42 width. Sides of carapace blackish brown, dorsally yellow, dorsal scutum brown, chelicerae, sternum and ventral scutum light yellow, legs yellow. Carapace with pair of dark brown, egg-shaped patches behind eyes; dorsally with three rows of short hairs. Eyes six in two rows, quite compactly arranged; ALE separated only by a line; posterior eyes in a straight row, touching each other. Base of cheliceral fang with prominent processes; retromargin of fang furrow with a small tooth. Labium wider than long; endites with pointed tip. Leg I: femur with 2 prolateral and 1 small retrolateral spine, patella spineless, tibia with 4 pairs, metatarsus with 2 pairs of very long ventral spines. Leg II is similar to leg I except femur with only one prolateral spine. Measurements of legs: I 2.13 (0.62, 0.27, 0.56, 0.43, 0.25); II 2.15 (0.63, 0.28, 0.52, 0.47, 0.25); III 1.85 (0.56, 0.25, 0.35, 0.44, 0.25); IV 2.65 (0.75, 0.36, 0.55, 0.64, 0.35). Leg formula: 4> 1 = 2> 3. Dorsal scutum about covering five-sixths abdominal length. Bulbus of palp elongated, gradually tapering apically, obtusely bent before apex. Embolic part not divided into distinct lobes, bearing complicated membranous outgrowths.

Female. Unknown.

Etymology. – Specific name comes from the type locality.

Figures

Fig. 4. Ischnothyreus qianlongae, new species: A, carapace of male, dorsal view; B, male, lateral view; C, left male chelicera, posterior view; D, left male palp, dorsal view; E, left male palpal bulb, apical view; F, left male palp, prolateral view; G, left male palp, retrolateral view. Scales: A, B = 0.2 mm, C = 0.1 mm, D-G = 0.05 mm.