Bannana crassispina, Tong, Yanfeng & Li, Shuqiang, 2015

Tong, Yanfeng & Li, Shuqiang, 2015, One new genus and two new species of oonopid spiders from Xishuangbanna Rainforest, southwestern China (Araneae, Oonopidae), ZooKeys 494, pp. 1-12 : 4-5

Taxon classification Animalia Araneae Oonopidae

Bannana crassispina sp. n.

Type material.

Holotype: male (IZCAS Ar-25082), China: Yunnan Province, Mengla County, Menglun Nature Reserve, Secondary tropical seasonal moist forest (21°54.718'N, 101°16.940'E, Alt: 645 m), pitfall traps, 16-31 April 2007, G. Zheng and Z. Chen leg. Paratypes: 1 male (IZCAS Ar-25085), same data as holotype; 1 female (IZCAS Ar-25080), same data as holotype; 1 female (IZCAS Ar-25078), same data as holotype; 1 female (IZCAS Ar-25084), same locality as holotype, 16-31 March 2007; 1 female (IZCAS Ar-25083), same locality as holotype, 1-15 May 2007; 1 female (IZCAS Ar-25087), same locality as holotype, 1-15 May 2007; 1 female (IZCAS Ar-25077), same locality as holotype, 16-31 May 2007; 1 male (IZCAS Ar-25074), 21°54.607'N, 101°17.005'E, Alt: 633 m, pitfall traps, 16-31 May 2007; 2 males (IZCAS Ar-25073), same locality as above, searching, 4-11 May 2007; 1 female (IZCAS Ar-25075), 21°54.984'N, 101°16.982'E, Alt: 656 m, pitfall traps, 16-31 April 2007; 1 male (IZCAS Ar-25072), same locality as above, 16-24 November 2006; 1 male (IZCAS Ar-25076), same locality as above, 16-28 February 2007; 1 female (IZCAS Ar-25081), 16-31 May 2007; 1 female (IZCAS Ar-25086), 16-31 June 2007; 1 female (IZCAS Ar-25079), Secondary tropical seasonal rainforest (21°55.428'N, 101°16.441'E, Alt: 598 m), pitfall traps, 16-31 June 2007.

Etymology.

The specific name is Latin, “crass-” = thick, and “spin-” = seta, referring to the thick bristles on male palpal tibiae.

Diagnosis.

The males of the new species can be distinguished from Bannana parvula sp. n. by the thick bristles on palpal tibiae (thb in Fig. 2A, D) and rows of setae on the central part of sternum (Fig. 1C); females of the new species are similar to those of Dysderoides synrang Grismado & Deeleman, 2014, but can be distinguished by the absence of macrosetae on legs III and IV, and by the large dorsal abdominal scutum.

Description.

Male. Body yellow, legs lighter. Habitus as in Fig. 1A, B. Body length 1.47; carapace 0.75 long, 0.49 wide; abdomen 0.85 long, 0.48 wide. Carapace broadly oval, pars cephalica slightly elevated in lateral view, dorsal surface smooth; sides reticulated; lateral margin rebordered; eyes reduced, only four eyes visible in frontal view (Fig. 1F). Mouthparts: chelicerae straight, paturon inner margin unmodified; labium anterior margin deeply incised (ldi) (Fig. 1C); endites slender, distally only slightly branched. Sternum: setae sparse, light, needle-like, evenly scattered; on the middle part of sternum with five pairs of short setae arranged in two rows (Fig. 1C). Abdomen: dorsal scutum covering full length of abdomen, no soft tissue visible from above, not fused to epigastric scutum. Pedicel tube short, unmodified. Book lung covers elliptical, surface smooth. Postepigastric and epigastric scutum fused, apodemes absent, posterior spiracles connected by groove (Fig. 1G). Leg spines: tibiae I, II with 4 pairs of ventral spines each; metatarsi I, II with 2 pairs of ventral spines each, legs III and IV without spines.

Male genitalia: epigastric region (Fig. 1G) with sperm pore small, oval, rebordered, situated in front of anterior spiracles. Palp (Fig. 2 A–G): pale-orange; femur enlarged, attached to patella basally; tibia with two very strong, thick bristles (thb) on prolaterodistal part; cymbium not fused with bulb, with scattered setae; bulb pear shaped, basal-ventral area bulged, about twice as long as cymbium, stout, tapering apically; embolus system (Fig. 2 E–G) complicated, with a wide, ear-shaped protrusion (esp) prolaterally, surface of the protrusion bearing numerous spinules, with a filiform, long and mesially curved projection (ffp) and a narrow branch (nb) retrolaterally.

Female: as in male except as noted. Habitus as in Fig. 3A, B. Slightly larger than male. Body length 1.78; carapace 0.73 long, 0.62 wide; abdomen 1.07 long, 0.69 wide. Abdomen: dorsal scutum covering about 3/4 of abdomen, about 2/3 of abdomen width (Fig. 3A). Sternum without characteristic setae. Postepigastric scutum short, boat-shaped, posterior margin smoothly curved, not fused to epigastric scutum (Fig. 3G).

Female genitalia: ventral view (Fig. 3H, I): posterior margin of epigastric scutum with two dark brown knobs (dkn); surface without external features. Dorsal view (Fig. 3J): with a elliptical posterior receptacle (pr), extending anterior by a narrow, stick-like sclerite (sls); with very short apodemes (apo).

Distribution.

Known only from the type locality.