Ptocasius foliolatus, Yang & Peng, 2023

Yang, Su-Fang & Peng, Xian-Jin, 2023, A review of the Ptocasius Simon, 1885 spiders of Gaoligong Mountains, China (Araneae: Salticidae), European Journal of Taxonomy 903 (1), pp. 1-61 : 20-22

Ptocasius foliolatus sp. nov.

urn:lsid:zoobank.org:act:C5CE9EBE-C520-4ABA-BB40-F277E08EF474

Figs 13–14 , 43

Diagnosis

The new species resembles P. zonatus sp. nov. ( Figs 39–40 ), but can be distinguished by: (1) pockets located relatively away from the copulatory openings in ventral view ( Figs 13B , 14A ), while located relatively closer to copulatory openings in P. zonatus ( Figs 39B , 40A ); (2) atrium margin somewhat parallel to each other in ventral view ( Figs 13B , 14A ), while somewhat V-shaped in P. zonatus ( Figs 39B , 40A ).

Etymology

The specific name is derived from the combination of the Latin noun ‘ folium ’ (‘leaf’) and the adjective ‘ latus ’ (‘wide’), referring to the leaf-like markings on abdominal dorsum.

Type material

Holotype

CHINA • ♀; Yunnan Province, Nujiang Prefecture, Gongshan County, Nujiang State Nature Reserve , Qiqi , 9.9 km West of Gongshan; 27°42′55″ N, 98°33′55″ E; 2000 m a.s.l.; 9–14 Jul. 2000; Heng-mei Yan, David Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU-00–QF–4A.

Paratype (1 ♀)

CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-00–QF– 4P.

Description

Female (holotype)

BODY AND HEAD. Total length 6.60. Prosoma 2.40 long, 1.80 wide. Opisthosoma 4.20 long, 2.60 wide. Clypeus height 0.13. Carapace ( Fig. 13A ) light yellowish brown, margin grayish black; eyes base black; ocular area dark brown. Fovea is short, reddish brown, sparsely covered with long black hairs, densely covered with short white and black hairs. Cervical and radial grooves are indistinct. Eye diameter and interdistances: AME 0.50, ALE 0.28, PLE 0.25, AERW 1.55, PERW 1.45, EL 1.00. Sternum scutiform, light yellowish brown, covered with short dark brown hairs. Clypeus brown, median area and promargin dark brown, covered with long white hairs. Endites and labium brown, distal area light brown, covered with grayish black hairs.

CHELICERAE ( Fig. 14C ). Light brown, covered with long brown hairs, two promarginal teeth and one retromarginal denticle.

LEGS. Light brown to grayish brown, densely covered with grayish black hairs; spines dense and short. Tibiae I and II with three pairs of long ventral spines, metatarsi I and II with two pairs of long ventral spines.

LEG MEASUREMENTS. I = 4.30 (1.40, 1.70, 0.60, 0.60), II = 4.00 (1.40, 1.50, 0.50, 0.60), III = 4.80 (1.60, 1.60, 0.90, 0.70), IV = 5.00 (1.50, 1.70, 1.00, 0.80). Leg formula: IV–III–I–II.

ABDOMEN ( Fig. 13A ). Long oval, dorsum yellowish brown, each side with a light brown zone; the median area grayish black with two pairs of reddish-brown sigillae, cardiac marking long strip; posterior portion with four arc dark markings; ventral light yellow, the median area with a grayish black longitudinal strip, sides with grayish black markings and irregular white spots. Spinnerets grayish black.

EPIGYNUM ( Figs 13B–C , 14A–B ). Almost as long as wide; the pockets angular, below and relatively away from copulatory openings; copulatory openings longitudinal, atrium margin almost parallel to each other in ventral view; copulatory ducts thick and large; spermathecae folded, heads touching.

Male

Unknown.

Distribution

China (Yunnan Province, Fig. 43 ).

Figures

Fig. 13.Ptocasius foliolatus sp. nov., holotype, ♀ (HNU-00–QF–4A).A. Body, dorsal view.B. Epigynum, ventral view. C. Vulva, dorsal view. Scale bars: A = 0.5 mm; B–C = 0.1 mm.

Fig. 14. Ptocasius foliolatus sp. nov., holotype, ♀ (HNU-00–QF–4A). A. Epigynum, ventral view. B. Vulva, dorsal view. C. Chelicerae, posterior view. Scale bars = 0.1 mm.

Fig. 43. Distribution records of the species: P. davidi sp. nov. (▲), P. foliolatus sp. nov. (•) and P. zabkai (▇).

Fig. 39.Ptocasius zonatus sp. nov., holotype, ♀ (HNU-00–GD–3A). A. Body, dorsal view.B. Epigynum, ventral view. C. Vulva, dorsal view. Scale bars: A = 0.5 mm; B–C = 0.1 mm.

Fig. 40. Ptocasius zonatus sp. nov., holotype, ♀ (HNU-00–GD–3A). A. Epigynum, ventral view. B. Vulva, dorsal view. C. Chelicerae, posterior view. Scale bars = 0.1 mm.