Xestaspis rostrata, Tong, Yanfeng & Li, Shuqiang, 2009

Tong, Yanfeng & Li, Shuqiang, 2009, Three new species and one newly recorded species of oonopid spiders (Araneae: Oonopidae) from Hainan, China, Zootaxa 2060, pp. 22-32 : 31

Xestaspis rostrata sp. nov.

Figs 1J–L , 2J–L , 6A–C .

Type material: Holotype male, 2 males and 3 females paratypes, CHINA: Hainan Province, Bawangling National Natural Reserve, Wangxia Town, 26 July 2007, SQ Li & CX Wang leg.; 1 male paratype, CHINA: Hainan Province, Jianfengling National Natural Reserve (alt. 811 m, 18°44.751´N, 108°51.234´E), 17 July 2007, SQ Li & CX Wang leg.; 2 females paratypes, CHINA: Hainan Province, Diaoluoshan National Natural Reserve (alt. 1010 m, 18°43.766´N, 109°51.815´E), 15 August 2007, SQ Li & CX Wang leg.; 2 males and 3 females paratypes, CHINA: Hainan Province, Wuzhishan National Natural Reserve, 4–7 August 2007, SQ Li & CX Wang leg. All type materials are deposited in IZCAS.

Etymology: The specific name comes from a Latin word, rostratus, meaning “with a beak”, referring to the duck-beak shaped distal part of embolus-conductor in male palp.

Diagnosis: The new species is similar to X. linnaei Ott & Harvey, 2008 , but can be distinguished by the epigastric scutum, which is not strongly extending far dorsal pedicel, the remarkable small receptaculum of female and the smooth carapace.

Description: Male. Body yellow or reddish brown, chelicerae and sternum lighter, legs yellow. Body length 2.40–2.71; carapace 1.02–1.17 length, 0.80–0.94 width; abdomen 1.37–1.49 length, 0.94–1.03 width. Clypeus with a row of strong hairs at anterior margin; clypeus height about 0.8 times the diameter of anterior eyes. Pars cephalica slightly elevated in profile ( Fig. 1K ). Carapace shiny and smooth all over ( Fig. 1J ), with a row of finely hairs along margin, its dorsal surface with two rows of short, finely hairs laterally and several directed, adpressed hairs medially. Eyes six, ALE slightly larger, PLE and PME nearly equal sized; ALE separated by about 0.8 times of its diameter; posterior eye row slightly recurved in dorsal view. Labium with 2 setae at anterior margin. Sternum with narrow, transverse palpal groove, covered with thin hairs standing in small pits, radial furrows present, but only discernible at base ( Fig. 1L ). Measurements of legs: I 2.37 (0.74, 0.37, 0.51, 0.49, 0.26); II 2.27 (0.61, 0.40, 0.51, 0.49, 0.26); III 1.88 (0.49, 0.34, 0.37, 0.43, 0.25); IV 2.69 (0.80, 0.43, 0.60, 0.57, 0.29). Leg formula: IV–I–II–III. Dorsal scutum ovoid, punctate, densely covered with short hairs. Booklung covers very small, anterolateral edge with tubercle. Pedicel tube short, with dorsolateral extension, scuto-pedicel region with straight scutal ridge, but interrupted at middle, and conspicuous ventralarched anterior scutal ridge ( Figs 2K, L ). Sperm pore narrow, slit-like. Colulus very small, bearing two setae. Cymbium and bulbus of palp yellow. Bulbus slightly shorter than cymbium,. Embolus-conductor complex, distal part duck-beak shaped in profile, mesially bent in dorsal view ( Figs 6A, B ).

Female. Similar to male in coloration and general features, but body size larger, sternum without palpal groove. Body length 2.77–2.91; carapace 1.14–1.20 length, 0.88–0.94 width; abdomen 1.66–1.72 length, 1.22–1.29 width. Measurements of legs: I 2.53 (0.80, 0.41, 0.57, 0.49, 0.26); II 2.49 (0.80, 0.41, 0.51, 0.51, 0.26); III 2.23 (0.71, 0.34, 0.46, 0.46, 0.26); IV 3.08 (0.94, 0.51, 0.66, 0.66, 0.31). Epigastric area without any external specialities ( Fig. 2J ). Vulva with a small receptaculum and complicated sclerites ( Fig. 6C ).

Figures

FIGURES 1 A – L. A – C. Gamasomorpha comosa sp. nov., male holotype; D – F. Gamasomorpha virgulata sp. nov., male holotype; G – I. Xestaspis loricata (L. Koch, 1873), male; J – L. Xestaspis rostrata sp. nov., male holotype. A, D, G, J. Habitus, dorsal view; B, E, H, K. Habitus, lateral view; C, F, I, L. Sternum, ventral view.

FIGURES 2 A – L. A – C. Gamasomorpha comosa sp. nov., female paratype; D – F. Gamasomorpha virgulata sp. nov., female paratype; G – I. Xestaspis loricata (L. Koch, 1873), female; J – L. Xestaspis rostrata sp. nov., female paratype. A, D, G, J. Abdomen, ventral view; B, E, H, K. Abdomen, lateral view; C, F, I, L. Abdomen, anteroventral view.

FIGURES 6 A – C. Xestaspis rostrata sp. nov. A – B. Left male palp, dorsal (A) and prolateral (B) views; C. Vulva, dorsal view. Scale lines: A = 0.05 mm; B = 0.1 mm; C = 0.2 mm.