Langona pattayensis sp. nov.

Figs 1–20

Etymology. The species is named after the type locality.

Diagnosis. In the similar L. davidi (Caleb, Mungkung & Mathai, 2015), the anterior tegular outgrowth is oriented retrolaterally vs prolaterally in L. pattayensis sp. nov. The embolus (Fig. 10) is much longer than in L. davidi (see Caleb 2020: fig. 17I), coiling more than 360° vs 180º in L. davidi. The shape of the epigyne (Fig. 18) is most similar to that of L. pallida Prószyński, 1993, but the pockets are deeper, and the spermathecae (Figs 19–20) have more distinctive accessory glands.

Description. Male (Holotype, UUME UPSZTY 155662, Figs 1–12). Carapace rather low and flat. Thoracic part almost twice as long as cephalic part, with 2 longitudinal stripes of white setae. Clypeus high, light brown, cheeks covered with white scales. Endites and labium light brown, with light tips. Sternum brown. Legs light brown, dorsally darker, legs I and IV with brown joint areas. Leg spination not distinctive. Dorsal opisthosoma with delicate scutum making up 57% of opisthosoma length, colouration light brown, centrally lighter with long protruding anterior white and brown setae. Spinnerets not distinctive, brown. Ventral opisthosoma light brown, with light setae.

Palp as in Figs 7–12. Ventral tibial apophysis in form of round outgrowth, retrolateral apophysis wide at base, distally pointed, ventrally bent and accompanied by long, thick, brown bristles. Tegulum elongate, with posterior pointed lobe and apical outgrowth. Embolus long, proximal part hidden by tegulum, coiling ca. 540º, visible distal part needle-like.

Dimensions: CL 2.90, CW 2.08, CH 1.39, clypeus height 0.27, EFL 0.99, AEW 1.57, AME diameter 0.47, PEW 1.39, OL 2.75, OW 1.80, legs: I 4.81 (0.30, 1.45, 0.93, 0.89, 0.65, 0.59), II 4.47 (0.28, 1.36, 0.87, 0.81, 0.53, 0.62), III 6.40 (0.32, 2.03, 1.03, 1.06, 1.32, 0.64), IV 6.19 (0.32, 1.70, 1.02, 1.08, 1.37, 0.70).

Female (Paratype, UUME UPSZTY 155663, Figs 13–20). Carapace brown, with darker eye field, covered with brown setae and white scales, latter forming two thoracic stripes. Clypeus light brown, cheeks covered with white scales. Chelicerae light brown, palps light brown with white setae. Endites and labium light brown, with lighter tips, sternum elongate, yellowish. Legs light brown, with brown patches and annulations. Leg spination not distinctive. Opisthosoma poorly preserved, dorsally light brown, covered with brown setae. Ventral opisthosoma light grey. Spinnerets not distinctive, light brown.

Epigyne as illustrated in Figs 18–20: with 2 merging posterior pockets, copulatory openings crescent-shaped, oriented towards each other, copulatory ducts C-shaped, membranous, spermathecae thick-walled, strongly sclerotized, multi-chambered, with distinctive accessory glands.

Dimensions: CL 3.06, CW 2.08, CH 1.52, clypeus height 0.10, EFL 1.05, AEW 1.60, AME diameter 0.31, PEW 1.47, OL 4.15, OW 2.92, legs: I 4.88 (0.38, 1.57, 0.97, 0.84, 0.61, 0.51), II 4.61 (0.38, 1.43, 0.94, 0.71, 0.57, 0.58), III 6.14 (0.44, 1.17, 1.09, 1.07, 1.21, 0.63), IV 6.09 (0.47, 1.68, 0.84, 1.09, 1.40, 0.61).

Type material. Holotype ³: THAILAND: Chonburi Province: Pattaya, leg. Å. Holm, 2–15.XII.1979 (amongst grass near seashore) (UUME UPSZTY 155662).

Paratypes: Same data as holotype, 13³, 1♀ (UUME UPSZTY 155663).

Distribution. Known only from the type locality (Fig. 34).

Remarks. The copulatory organs are very uniform within the genus. The new species is most similar to L. albolinea Caleb & Mathai, 2015, L. alfensis Hęciak & Prószyński, 1983, L. davidi, L. hongkong Song, Xie, Zhu & Wu, 1997 and L. simoni Hęciak & Prószyński, 1983, but the true relationships may not reflect these similarities; all species listed are known from south and southeast Asia.