Ischnothyreus jianglangi Tong & Li sp. nov. Figures 2, 17A, B

Type material.

Holotype ♀: Myanmar, Kachin State, Putao, Hponkanrazi Wildlife Sanctuary, roadside between Camp 2 to Camp 1; 27°35'806"N, 96°59'532"E; elevation ca 1613 m; 10.V.2017; Wu J. & Chen Z. leg. (IZCAS AR-25159).

Diagnosis.

The new species is similar to I. jojo Kranz-Baltensperger, 2011 in the triangular shaped atrium, but can be distinguished by shape of the dorsal abdominal scutum (width/length = 1/2 (Fig. 2A) vs approximately 1/3; Kranz-Baltensperger 2011: fig. 25A), and the unmodified exterior surface of postgastric scutum (Fig. 17A) (vs with curved, sclerotized extensions and U-shaped structure; Kranz-Baltensperger 2011: fig. 25E, F).

Description.

Female (holotype). Body: habitus as in Fig. 2A-C; body length 2.35. Carapace: 1.02 long, 0.87 wide; brown, without any pattern, ovoid in dorsal view, slightly elevated in lateral view, surface finely reticulate, fovea absent, lateral margin straight, smooth (Fig. 2D, F). Clypeus: height about equal to ALE radius or less (Fig. 2G). Eyes: six, in one group, well developed, subequal, ALE circular, PME and PLE oval, posterior eye row procurved from both above and front (Fig. 2D, G). Sternum: as long as wide, pale brown, uniform, not fused to carapace, surface smooth, setae sparse (Fig. 2E). Mouthparts: chelicerae, endites and labium pale brown; chelicerae straight, base of fangs unmodified (Fig. 2G); labium rectangular, not fused to sternum, anterior margin not indented at middle; endites unmodified (Fig. 2E). Abdomen: 1.42 long, 1.01 wide; dorsal scutum covering less than 1/2 of the abdomen length and 1/3 of the abdomen width, not fused to epigastric scutum; epigastric and postgastric scutum well sclerotized, pale orange, unfused (Fig. 2A, B). Legs: pale orange, femur I with two prolateral spines, tibia I with four pairs, metatarsus I with two pairs of long ventral spines. Leg II spination is similar to leg I except femur with only one prolateral spine. Legs III and IV spineless. Epigastric area: surface without external features (Fig. 2H). Endogyne: from the middle of the slightly thickened margin of the postgastric scutum runs a dark, simple winding tube posteriorly, ending in a black, triangular shaped atrium (Fig. 17A, B).

Male. Unknown.

Etymology.

The species is named after Mr Jianglang Wu, one of the collectors of the holotype; noun in genitive case.

Distribution.

Known only from the type locality.