Clubiona kai, Jäger, Peter & Dankittipakul, Pakawin, 2010

Jäger, Peter & Dankittipakul, Pakawin, 2010, Clubionidae from Laos and Thailand (Arachnida: Araneae), Zootaxa 2730, pp. 23-43 : 25-26

Clubiona kai spec. nov.

Figs 4-12, 71

Type material: Holotype: male, LAOS: Luang Prabang Province: SE Luang Prabang, Nam Khan, Ban Keng Koung , 372 m altitude, N 19°40.963', E 102°18.442', along stream, disturbed forest, cultivated land, by hand, at night, 23 February 2008, P. Jäger leg. ( SMF, L15) .

Etymology. The species name is derived from the Lao word “kai”, meaning “egg”, referring to the egg-shaped tegulum; term in apposition.

Diagnosis. Small sized Clubioninae with body length of males 3.8 mm, belonging to the corticalis species-group. Male palp (Figs 4-7) similar to that of Clubiona didentata Zhang and Yin, 1998 described from Southern China, Yunnan. Males can be distinguished by 1) embolus with transversal branch clearly visible in ventral view (Fig. 5; hidden in C. didentata ), 2) distal tegular tooth pointing prolatero-distally (Fig. 5; pointing distally in C. didentata ), 3) RTA distinctly wider than long in retrolateral view (Fig. 6; slightly longer than wide in C. didentata ).

Description. Male (holotype): PL 1.7, PW 125, AW 0.9, OL 2.1, OW 1.0. Eye diametres (Fig. 8): AME 0.10, ALE 0.13, PME 0.12, PLE 0.12. Eye interdistances: AME-AME 0.10, AME-ALE 0.07, PME-PME 0.29, PME-PLE 0.12, AME-PME 0.12, ALE-PLE 0.05, clypeus AME 0.05, clypeus ALE 0.05. Leg and pedipalp measurements: pedipalp 1.58 (0.55, 0.26, 0.24, -, 0.53); leg I 3.95 (1.10, 0.60, 1.13, 0.72, 0.40); leg II 4.53 (1.27, 0.64, 1.35, 0.85, 0.42); leg III 3.79 (1.05, 0.52, 0.84, 0.95, 0.43); leg IV 4.92 (1.16, 0.57, 1.24, 1.40, 0.55). Leg formula. 4213. Spination: Pedipalp femur: 020, patella 020, tibia 2000, tarsus 3002; Femur I p001, d111, II-IV p001, d111, r001; Patella IV r010; Tibia I-II v220, III p010, r010, v010, IV p011, r011, v010; Metatarsus I-II v200, III p101, r101, v203, IV p111, r111, v103.

Chelicerae with distinct frontal bulge (Fig. 12), cheliceral furrow with 5 anterior and 2 posterior teeth in continuous rows (Fig. 9). Tarsi and metatarsi with sparse to absent scopulae. Tarsi I-II with reduced claw tufts. Spinnerets and anal tubercle elongated.

Palp as in diagnosis. Cymbium distinctly longer than tibia. Subtegulum visible in prolateral view. RTA slightly pointed at ventral side. Tegulum ovoid extending prolaterally and retrolaterally beyond cymbium. Embolus arising distally from tegulum, with basal torsion and distal sickle-shaped bend (Figs 4-7).

Colour in ethanol (Figs 10-12). Yellowish brown without colour pattern. Dorsal prosoma darker brown anteriorly, fovea distinct. Chelicerae, gnathocoxae and labium reddish brown. Sternum marginally more strongly sclerotised, darker anteriorly. Appendages pale yellow with leg joints slightly darker. Dorsal opisthosoma pale yellowish brown with oval light brown patch (resembling a scutum), reaching posterior half; ventral opisthosoma with epiandrium as triangular pale white zone bordered by darker patches. Posterior spinnerets dark.

Female: unknown.

Distribution. Known only from the type locality (Fig. 71: 5).