Ischnothyreus taunggyi Tong & Li sp. nov. Figures 8, 9, 10, 14D-F, 15C, D, 16G, H

Type material.

Holotype ♂: Myanmar, Shan State, Taunggyi, East of Nyaung Shwe Township; 20°34'700"N, 96°57'450"E; elevation ca 1005 m; 30.XI.2016; Wu J. leg. (IZCAS AR-25177). Paratypes 2♀: same data as for holotype (IZCAS AR-25178-25179).

Diagnosis.

The new species is similar to I. zhigangi sp. nov. in the male palp and the crown-shaped sclerotized process of male cheliceral fang, but can be distinguished by the long abdominal dorsal scutum (3/4 of the abdomen length (Fig. 8A) vs very small; Fig. 11A) and ventral scutum (4/5 of the abdomen length (Fig. 8B) vs very small; Fig. 11B) of male, and the long abdominal dorsal scutum (less than 1/2 of the abdomen length (Fig. 10A) vs very small; Fig. 13A) and the nipple-shaped atrium (Fig. 16G) (vs inverted bell-shaped atrium; Fig. 17E) of female.

Description.

Male (holotype). Body: habitus as in Fig. 8A-C; body length 1.71. Carapace: 0.84 long, 0.63 wide; pale brown, with egg-shaped patches behind eyes, ovoid in dorsal view, strongly elevated in lateral view, surface of elevated portion of pars cephalica smooth, sides finely reticulate, fovea absent, lateral margin straight, smooth (Fig. 8D). Clypeus: height about equal to ALE radius or more. Eyes: six, in one group, well developed, ALE largest, ALE circular, PME and PLE oval, posterior eye row recurved from above, procurved from front (Fig. 8D). Sternum: as long as wide, pale orange, uniform, not fused to carapace, surface smooth, setae sparse (Fig. 8E). Mouthparts: chelicerae, endites and labium orange; chelicerae straight, with crown-shaped sclerotized process at base of fangs, fang groove with a few small and one larger denticles (Fig. 15C, D); labium rectangular, not fused to sternum, anterior margin not indented at middle; anteromedian tip of endites with one strong, tooth-like projection (Fig. 8E). Abdomen: 0.74 long, 0.49 wide; dorsal scutum well sclerotized, pale orange, covering 2/3 the abdomen width and approximately 3/4 of the abdomen length, unfused to epigastric scutum; epigastric and postgastric scutum well sclerotized, pale orange, fused, postgastric scutum covering about 4/5 of the abdomen length (Fig. 8A, B). Legs: pale orange, femur I with three prolateral and one small retrolateral 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 two prolateral spines. Legs III and IV spineless. Palp: strongly sclerotized, trochanter with ventral projection, cymbium brown, fused with bulb; bulb brown, with two large ventral protuberances, distal end of bulb elongated, with one leaf-shaped prolateral projection and distal needle like membrane, retrolateral lobe broad, ear-shaped (Figs 9, 14D-F).

Female (paratype, IZCAS AR-25178). Same as male except as noted. Body: habitus as in Fig. 10A-C; body length 1.98. Carapace: 0.83 long, 0.71 wide; without any pattern (Fig. 10D). Mouthparts: chelicerae and endites unmodified (Fig. 10E, G). Abdomen: 1.27 long, 0.83 wide; dorsal scutum covering less than 1/2 of the abdomen length, about 1/3 of the abdomen width (Fig. 10A). Epigastric area: the postgastric scutum with central anchor-shaped structure (Fig. 10H). Endogyne: from the middle of the slightly thickened margin of the postgastric scutum runs a dark, very complex winding tube posteriorly, ending in a small, bell-shaped atrium (Fig. 16G, H).

Etymology.

The specific name is a noun in apposition taken from the type locality.

Distribution.

Known only from the type locality.