Opopaea gibbifera, 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 : 64

Opopaea gibbifera , new species

( Fig. 7A–G )

Holotype. – Male ( IZCAS), Mountain Wuzhishan (18 ° 49'N 109 ° 39'E), Wuzhishan City, Hainan Island, China, coll. Y. Song, X. Han and Y. Tong, 16 Apr.2005.

Paratypes. – 2 males, 9 females ( IZCAS), same data as holotype .

Diagnosis. – The new species is similar to Opopaea cornuta Yin & Wang, 1984 (Yin & Wang, 1984), in having coneshaped tubercles on posterior corners of carapace, but can be distinguished in male by the bulge on posterior part of sternum between coxae IV, the pointed projection on anterior end of endites, the slender palpal femur, the relatively longer palpal patella, and the long extension on the border of bulbus and embolus; in female by the presence of a small triangular parmula in genital area; and in both sexes by the finely longitudinal striae on sides of carapace.

Description. – Male. Reddish-brown species with yellowishbrown legs. Body length 1.39–1.42; carapace 0.61–0.67 length, 0.51–0.54 width; abdomen 0.84–0.89 length, 0.62– 0.64 width. Posterior margin of carapace concaved; sides with finely longitudinal striae; dorsal area smooth with some mesially pointing hairs at lateral edges and pair of coneshaped tubercles on posterior corners, one larger and one very small, both bearing up-standing long hairs. Eyes rather large, PLE relatively smaller; AME about half their diameter apart, touching posterior lateral eyes; posterior eyes in a slightly retro-curved row, touching each other. Height of clypeus about one and half diameters of AME. Sternum smooth, with distinguished radial furrows; posterior part between coxae IV strongly bulged, cone-shaped in lateral view. Anterior end of endites with a small, sharply pointed projection. Legs short, thick and spineless. Measurements of legs: I 1.26 (0.42, 0.22, 0.27, 0.22, 0.13); II 1.30 (0.44, 0.21, 0.27, 0.24, 0.14); III 1.10 (0.36, 0.17, 0.22, 0.21, 0.14); IV 1.54 (0.47, 0.24, 0.35, 0.29, 0.19). Leg formula: 4> 1 = 2> 3. Abdominal dorsal scutum oval-shaped, sparsely covered with short hairs. Lobes on anterolateral corners of petiolar tube distinct, ridges developed, but without forming a scutal cove; opercula small, oval-shaped. Sperm pore clearly discernible, transverse. Patella of palp significantly larger than cymbiobulbus; fenestra rather large; cymbiobulbus with a long extension on the border of bulbus and embolus.

Female. Body length 1.39–1.67; carapace 0.65–0.68 length, 0.52–0.56 width; abdomen 1.04–1.06 length, 0.76–0.79 width. Height of clypeus equal to or nearly shorter than one diameter of AME. Sternum without cone-shaped tubercle like in male. Endites without projections. Measurements of legs: I 1.33 (0.42, 0.24, 0.28, 0.25, 0.14); II 1.31 (0.42, 0.24, 0.27, 0.24, 0.14); III 1.09 (0.36, 0.18, 0.21, 0.21, 0.13); IV 1.57 (0.47, 0.24, 0.41, 0.28, 0.17). Postgynal depression of epigastric area shallow; parmula black, small.

Etymology. – Specific name from the Latin “ gibbifer = with tuber”, in reference to the cone-shaped bulge on posterior part of sternum between coxae IV in male.

Figures

Fig. 7. Opopaea gibbifera, new species: A, carapace of male, dorsal view; B, sternum of male, ventral view (the arrow refers to the bulge between coxae IV); C, carapace of male, lateral view; D, anterior part of male abdomen, obliquely ventral view; E, abdomen of female, ventral view; F, left male palp, prolateral view; G, left male palp, retrolateral view. Scales: A-E = 0.4 mm, F, G = 0.1 mm.