Siamlema changhai Zhao & Li sp. nov. Figures 1D, 20, 21, 33

Type material.

Holotype: ♂ (IZCAS), Thailand, Trang Province, Noyong District, Chang Hai Cave, 7.5893N, 99.6688E, elevation ca. 32 m, XI.2015, Z. Chen, G. Zhou, and Q. Zhao leg. Paratypes: 2♂ and 4♀ (IZCAS), same data as holotype.

Other material examined.

1♀ (molecular voucher, IZCAS), same data as holotype.

Etymology.

The species name refers to the type locality; noun in apposition.

Diagnosis.

This species resembles S. suea sp. nov. but can be distinguished by the following: the absence of eyes (Figs 20A, 21B) (vs. presence), the presence of a bulbal apophysis (Fig. 20B-D) (vs. absence), the presence of a dorsal spine on the palpal femur distally (arrows on Fig. 20C, D) (vs. spine absent), and the absence of a spine on the palpal tibia retrolaterally (Fig. 20D) (vs. spine present). Receptacle is tube-shaped (Fig. 21A) (vs. globular).

Description.

Male (holotype). Total length 0.92. Carapace 0.41 long, 0.40 wide. Abdomen 0.50 long, 0.44 wide. Carapace brown (Fig. 20A). Eyes absent (Fig. 20A). Chelicerae, legs, labium, and endites brown. Sternum bright brown. Leg measurements: I 3.28 (0.95, 0.17, 1.00, 0.69, 0.47); II 2.93 (0.86, 0.16, 0.85, 0.63, 0.43); III 2.17 (0.66, 0.14, 0.58, 0.43, 0.36); IV 2.73 (0.86, 0.14, 0.75, 0.56, 0.42). Abdomen brown with a few long setae (Fig. 20A).

Palp. Tibia 1.57 times longer than patella, cymbium 1.22 times longer than tibia, femur 1.06 times longer than cymbium (Fig. 20C, D); cymbial apophysis present at sub-distal part (Fig. 20C), one femoral distal spine (Fig. 20C, D), a semi-round extension on patella proximally (Fig. 20D); bulb shaped as in Fig. 20C, D; bulbal apophysis nearly transparent, with 4 sclerotized teeth (Fig. 20B-D); embolus sclerotized, finger shaped (Fig. 20B-D).

Female. Total length 1.04. Carapace 0.48 long, 0.41 wide. Abdomen 0.56 long, 0.50 wide. Carapace, sternum, legs milky white (Fig. 21B, C). Leg measurements: I 3.31 (1.00, 0.17, 0.99, 0.67, 0.48); II 2.97 (0.90, 0.16, 0.86, 0.60, 0.45); III 2.18 (0.67, 0.14, 0.59, 0.42, 0.36); IV 2.73 (0.86, 0.15, 0.75, 0.56, 0.41). Abdomen dark brown with some long setae (Fig. 21B, C). Receptacle tube-shaped, neck two times thinner than distal part (Fig. 21A).

Distribution.

Thailand (Trang, site 9 in Fig. 33), known only from the type locality.