Ptocasius zonatus, 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 : 53-55

Ptocasius zonatus sp. nov.

urn:lsid:zoobank.org:act:697210C4-E504-4C47-82D9-546D41265FFD

Figs 39–40 , 45

Diagnosis

The new species resembles P. zabkai sp. nov. ( Figs 37–38 ), but can be distinguished by: (1) posterior margin of pockets as long as wide in ventral view ( Figs 39B , 40A ), while two times as wide as long in P. zabkai ( Figs 37B , 38C ); (2) interdistance of pockets four times as wide as pockets in ventral view ( Figs 39B , 40A ), while as wide as pockets in P. zabkai ( Figs 37B , 38C ); (3) copulatory openings nearly transverse in ventral view ( Figs 39B , 40A ), while longitudinal in P. zabkai ( Figs 37B , 38C ); (4) anterior interval of copulatory openings four times as wide as posterior interval in ventral view ( Figs 39B , 40A ), while slightly wider than posterior interval in P. zabkai ( Figs 37B , 38C ).

Etymology

The specific name is derived from the Greece noun ‘ζονη’(‘band’), referring to the form of the copulatory tube.

Type material

Holotype

CHINA • ♀; Yunnan Province, Nujiang Prefecture, Gongshan County, Danzhu , 13.5 km Southwest of Gongshan; 27°37′50″ N, 98°37′14″ E; 2700 m a.s.l.; 2 Jul. 2000; David Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick, Heng-mei Yan and Da-zhi Dong leg.; HNU-00–GD–3A.

Paratype (1 ♀)

CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-00–GD– 3P.

Description

Female (holotype)

BODY AND HEAD. Total length 5.30. Prosoma 2.10 long, 1.50 wide. Opisthosoma 3.20 long, 1.90 wide. Clypeus high 0.10. Carapace ( Fig. 39A ) brown, carapace margin and eye base black, covered with white hairs; the median area of carapace with a yellowish-brown longitudinal band, margin covered with dense white hairs. Fovea dark brown, short bar-shaped. Cervical and radial groove black. Eye diameters and interdistances: AME 0.40, ALE 0.20, PLE 0.20, AERW 1.30, PERW 1.30, EL 0.89. Sternum scutiform, slightly bulged, covered with short brown hairs, median area yellowish brown, margin grayish black. Clypeus greyish brown, densely covered with long white hairs. Endites and labium grayish brown, distal area light brown and covered with grayish black hairs.

CHELICERAE ( Fig. 40C ). Dark brown, two promarginal teeth and one retromarginal denticle.

LEGS. Yellowish brown to brown with grayish black markings or annuli; bearing numerous spines. Tibiae I and II with two pairs of long ventral spines, metatarsi I and II with one pair of ventral spines.

LEG MEASUREMENTS. I = 3.40 (1.10, 1.30, 0.50, 0.50), II = 3.10 (1.00, 1.20, 0.50, 0.40), III = 3.60 (1.10, 1.20, 0.70, 0.60), IV = 4.30 (1.30, 1.50, 0.80, 0.70). Leg formula: IV–III–I–II.

ABDOMEN ( Fig. 39A ). Oval, dorsum grayish black with irregular black markings; retromargin sides light yellow, the posterior median area with two big black markings; the median area with a triangular black marking; ventral yellowish brown with grayish black markings, the median area with a grayish black longitudinal band; each side with irregular grayish black twills. Spinnerets grayish black.

EPIGYNUM ( Figs 39B–C , 40A–B ). Wider than long; the pockets below and close to copulatory openings, interdistance of pockets four times as wide as pockets in ventral view; copulatory openings almost transverse; anterior interval of copulatory openings four times as wide as posterior interval in ventral view; copulatory ducts large; spermathecae twisted, band-shaped.

Male

Unknown.

Distribution

China (Yunnan Province, Fig. 45 ).

Figures

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.

Fig. 45. Distribution records of the species: P. umbellulatus sp. nov. (•) and P. zonatus sp. nov. (▲).

Fig. 37. Ptocasius zabkai sp. nov., holotype, ♂ (HNU-00–QD–1A). A. Body, dorsal view. B. Epigynum, ventral view. C. Vulva, dorsal view. Scale bars: A = 0.5 mm; B–C = 0.1 mm.

Fig. 38. Ptocasius zabkai sp. nov. A–B. Holotype, ♂ (HNU-00–QD–1A). C–D. Paratype, ♀ (HNU-00– QD–1P). A. Palp, ventral view. B. Palp, retrolateral view. C. Epigynum, ventral view. D. Vulva, dorsal view. Scale bars = 0.1 mm.