Pholcus tharnlodensis Yao & Li sp. nov.

Figs 3–4, 31 A–B

Type material. Holotype: male, Tharn Lod Cave (08°31.183′N, 98°33.915′E, elevation 116 m), Tham Thong Lang, Tap pud District, Phang Nga, Thailand, 27 October 2014, H. Zhao, Y. Li and Z. Chen leg. Paratypes: 1 male and 2 females, same data as holotype.

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. This species resembles P. hinsonensis sp. nov. (Figs 1–2) in having a similar procursus (Figs 3 A– D) and female genitalia (Fig. 4 A) but can be distinguished by long eye-stalks on the male ocular area (Fig. 31 A), by the absence of frontal and distal apophyses on the male chelicerae (Fig. 4 D), by a distally blunt uncus (Fig. 4 C), and by a distally hooked appendix (Fig. 4 C).

Description. Male (holotype): Total length 4.89 (5.26 with clypeus), carapace 1.33 long, 1.48 wide, opisthosoma 3.56 long, 1.33 wide. Leg I: 54.64 (12.82 + 0.75 + 13.46 + 25.13 + 2.48), leg II: 36.08 (9.29 + 0.64 + 9.29 +15.26 + 1.60), leg III: 23.45 (6.54 + 0.67 + 5.83 + 9.23 + 1.18), leg IV: 30.56 (8.72 + 0.69 + 7.63 + 12.12 + 1.40); tibia I L/d: 96. Distance PME-PME 0.63; diameter PME 0.11; distance PME-ALE 0.03; distance AME- AME 0.02; diameter AME 0.03. Sternum wider than long (1.02/0.88). Habitus as in Figs 4 E–F. Carapace yellowish, with yellow marks extending to ocular area; ocular area yellowish; clypeus yellowish; sternum yellowish. Legs yellowish, distal parts of femora and tibiae whitish, darker rings absent. Opisthosoma yellowish, with indistinct spots dorsally. Ocular area elevated; each eye triad on top of a long, laterally directed eye-stalk (Fig. 31 A). Thoracic furrow absent. Chelicerae as in Fig. 4 D, with pair of unsclerotized apophyses proximolaterally. Pedipalps as in Figs 3 A–B; trochanter with a long ventral apophysis; femur with a dorsal apophysis proximally; procursus simple, with two prolatero-dorsal spines distally (arrows in Fig. 3 C), and a hooked ventral apophysis distally; uncus with scales; appendix hooked; embolus weakly sclerotized, with some transparent projections distally. Retrolateral trichobothrium of tibia I at 6.3%; legs with short vertical setae on tibiae, metatarsi and tarsi; without spines and curved setae; tarsus I with approximately eight distinct pseudosegments.

Female: Similar to male, habitus as in Figs 4 G–H. Total length 5.26 (5.71 with clypeus), carapace 1.42 long, 1.36 wide, opisthosoma 3.84 long, 1.52 wide; tibia I: 15.06; tibia I L/d: 48. Distance PME-PME 0.28; diameter PME 0.11; distance PME-ALE 0.03; distance AME-AME 0.02; diameter AME 0.03. Sternum wider than long (1.01/0.96). Ocular area without eye-stalks (Fig. 31 B). External genitalia (Fig. 4 A) without knob. Vulva (Fig. 4 B) with a sclerotized anterior arch and two oval pore plates.

Distribution. Thailand (Phang Nga, type locality; Fig. 32).

Natural history. The species was found in the aphotic zone inside the cave.