Octonoba sanyanensis Barrion, Barrion-Dupo & Heong

Alberto T. Barrion, Aimee Lynn A. Barrion-Dupo, Josie Lynn A. Catindig, Sylvia C. Villareal, Ducheng Cai, Qianhua Yuan & Kong Luen Heong, 2016, NEW SPECIES OF SPIDERS (ARANEAE) FROM HAINAN ISLAND, CHINA, UPLB Museum Publications in Natural History 3, pp. 1-103 : 43-44

Octonoba sanyanensis Barrion, Barrion-Dupo & Heong , new species [ Figure 49 A-E]

FEMALE. Holotype female, total length 4.20 mm. Cephalothorax length 1.20 mm, width 1.20 mm. Abdomen 3.70 mm, width 2.20 mm. Paratype female, total length 3.60 mm.

Carapace. Pale yellow with two broad submedian longitudinal bands, narrow black eye margins. Cephalic narrower than the elevated and bilobed thoracic area. Chelicerae yellow without promarginal tooth. Retromargin bears a large anterior and three very minute posterior teeth. Pedipalps yellow except brown claws. Maxillae dull yellow with brown serrula, as long as wide, basally narrow and broad towards converging apices. Labium yellow distinctly triangular anteriorly. Sternum slightly elevated with a small hump opposite each coxae, brown to gray, median area with a longitudinal yellow band and two pairs of rounded yellow spots opposite areas between coxa I and II, and II and III. Posterior tip of sternum narrows to a bluntly rounded to nipple-like process.

Eyes. In two recurved rows of four. AER shorter than PER (0.59: 0.66 mm). Eye diameter (mm): AME (0.09)> PME = PLE (0.07)> ALE (0.04). Eye separation (mm): ALE-PLE (0.20)> PME-PME (0.19)> AME-ALE = PME-PLE (0.11)> AME-AME (0.07). Clypeus height broader than one AME diameter.

Legs. Yellow except black ventral longitudinal bands in femur I extended to tibia I and apical one-third of metatarsus I and entire tarsus I. Anterior half of tibia I bears a thick mat of club-like hairs dorsally and ventrally. Legs II and III with slightly black patches present on apicoventral tip of femur, patella , ventroapical one-third of tibia, ventroapical one-fourth of metatarsus and most of tarsus. Leg IV with interrupted black bands in mid- and tip of femur, venttrobasal patella and midtibia. Calamistrum on metatarsus IV with curved tips black. Venter of tarsus IV lined with about 20-22 peg-like spines. Metatarsus IV has a single prolateral spine. Leg formula 1423.

Abdomen. White with four pairs of distinct humps, anterior pair the largest with a pair of brownish clump of hairs on each hump. Abdomen triangular in lateral view. Anterior abdomen with short brown club setae. Venter white with a black longitudinal band anterior of epigynum, midabdomen and around cribellum.

Epigynum with a protruding deeply bifurcate posterior process covered by whitish yellow hairs. A black longitudinal band present anterior of the bifurcate "scape-like" process. Spermathecae shortly oblong, diverge apically.

MALE. Unknown.

Material Examined. Holotype female (coll. no. San 2011-1) and paratype female CHINA, Hainan Island, Sanya , Sanya College campus, (coll. no. San 2011-2), ATBarrion, JLACatindig and SCVillareal.

Diagnostic Features. In terms of physical features, this species is closely allied to Octonoba aurita Dong, Zhu and Yoshida, 2005 but differs from the latter in (1) wider and longer posterior epigynal lobes, (2) calamistrum occupies three-fourths of metatarsus IV length, (3) longer leg segments, (4) tibia IV almost as long as metatarsus IV, (5) patella I, patella IV, metatarsus III and tarsus I equally long, and (6) prominent humps on abdominal dorsum.

Etymology. Named after the type locality.

Figures

Figure 49 A-E. Octonoba sanyanensis Barrion, Barrion-Dupo & Heong, new species, holotype female (A), metatarsus I (B), ventral view of uncleared (C), cleared (D) and dorsal (E) views of epigynum.