Ptocasius danzhu, Yang & Peng, 2023

Ptocasius danzhu sp. nov.

urn:lsid:zoobank.org:act:

Figs 5–7 View Fig View Fig View Fig , 42 View Fig

Diagnosis

The male of the new species resembles that of P. tenzingi Żabka, 1980 ( Żabka 1980: figs 2, 4, 6, 8), but can be distinguished by: (1) embolus originating at about 9:00 o’clock position in ventral view ( Figs 5B View Fig , 7A View Fig ), while originating at about 8:00 o’clock in P. tenzingi ( Żabka 1980: fig. 2); (2) genital lobe nearly rectangle in ventral view ( Figs 5B View Fig , 7A View Fig ), while globular in P. tenzingi ( Żabka 1980: fig. 2); (3) tibial apophysis spatuliform, almost rectangle, tip triangular in retrolateral view ( Figs 5C View Fig , 7B View Fig ), while needle-shaped with pointed tip in P. tenzingi ( Żabka 1980: fig. 4). The female of the new species resembles that of P. tenzingi ( Żabka 1980: figs 11, 15, 18), but can be distinguished by: pockets present antero-laterally in ventral view ( Figs 6B View Fig , 7D View Fig ), while present mid-ventrally in P. tenzingi ( Żabka 1980: fig. 15).

Etymology

The specific name is derived from the type locality Danzhu Village.

Type material

Holotype

CHINA • ♂; Yunnan Province, Nujiang Prefecture, Gongshan County, Danzhu Village , 15.7–16.0 km Southwest of Gongshan ; 27°37′37″ N, 98°35′31″ E to 27°37′19″ N, 98°35′14″ E; 2800–3425 m a.s.l.; 2 Jul. 2000; Heng-mei Yan, David Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU-00–GDS–1A. GoogleMaps

Paratypes (13 ♂♂, 14 ♀♀)

CHINA – Yunnan Province • 3 ♂♂, 2 ♀♀; same collection data as for holotype; HNU-00–GDS–1P GoogleMaps • 9 ♂♂, 11 ♀♀; 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–2 GoogleMaps • 1 ♀; Nujiang Prefecture, Nujiang State Nature Reserve, No. 12 bridge Camp area , 16.3 km West of Gongshan; 27°42′54″ N, 98°30′08″ E; 2775 m a.s.l.; 15–19 Jul. 2000; Heng-mei Yan, David Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU-000709–2 GoogleMaps • 1 ♂; Nujiang Prefecture, Gongshan County, Danzhu , 13.5 km Southwest of Gongshan; 27°37′50″ N, 98°37′14″ E; 2700 m a.s.l.; 30 Jun.–5 Jul. 2000; David Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick, Heng-mei Yan and Da-zhi Dong leg.; HNU-000709–3 GoogleMaps .

Description

Male ( holotype)

BODY AND HEAD. Total length 4.60. Prosoma 2.10 long, 1.50 wide. Opisthosoma 2.50 long, 1.40 wide. Clypeus height 0.10. Carapace ( Fig. 5A View Fig ) light brown, covered with long white and brown hairs; margin black; ocular area dark black. Fovea short, reddish brown, radial groove indistinct. Eye diameter and interdistances:AME 0.45,ALE 0.25, PLE 0.25, AERW 1.25, PERW 1.20, EL 0.85. Sternum obpyriform, light yellow, densely covered with fine brown hairs, margin dark brown. Clypeus brown, promargin black, covered with a row of long brown hairs. Endites light brown, distal area light yellow, covered with black hairs. Labium triangular, brown, margin light brown, distal area covered with grayish black hairs.

CHELICERAE ( Fig. 7C View Fig ). Brown, sparsely covered with long brown hairs, two promarginal teeth and one retromarginal denticle.

LEGS. Light brown to brown, tibiae I relatively darker in color, bearing thin and weak spines. 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 = 5.15 (1.60, 2.05, 0.90, 0.60), II = 4.00 (1.30, 1.50, 0.70, 0.50), III = 4.20 (1.30, 1.40, 1.00, 0.50), IV = 4.60 (1.40, 1.60, 1.00, 0.60). Leg formula: I–IV–III–II.

ABDOMEN ( Fig. 5A View Fig ). Elongated oval, dorsum light brown with two black longitudinal bands, the posterior one with three pairs of inclined markings; the posterior median area with three short black arc-shaped markings, mid-dorsally with two pairs of sigillae, reddish brown; ventral light white with three black longitudinal bands. Spinnerets dark brown.

PALP ( Figs 5B–C View Fig , 7A–B View Fig ). Longer than wide; embolus slender, as long as the width of the genital bulb, originates at about 9:00 o’clock position, tip reaches to the position of 13:00 o’clock; genital bulb with membranous structure and a conic bulge; genital lobe almost rectangular; tibial apophysis lamellar, tip triangular.

Female ( paratypes)

BODY AND HEAD. Total length 4.90. Prosoma 2.00 long, 1.50 wide. Opisthosoma 2.75 long, 1.70 wide, light color. Clypeus height 0.08. Eye diameter and interdistances: AME 0.40, ALE 0.20, PLE 0.20, AER 1.25, PER 1.20, EFL 0.75. All of the body, markings, and other morphological features same as in male.

LEG MEASUREMENTS. I = 3.15 (1.00, 1.30, 0.50, 0.35), II = 3.00 (0.95, 1.20, 0.50, 0.35), III = 3.60 (1.10, 1.25, 0.75, 0.50), IV = 3.95 (1.25, 1.40, 0.80, 0.50). Leg formula: IV–III–I–II.

EPIGYNUM ( Figs 6B–C View Fig , 7D–E View Fig ). Longer than wide; the pockets angular, almost touching copulatory openings, present antero-laterally; copulatory openings ()-shaped, atrium outline circular; spermathecae relatively folded, complicated, the anterior margins of spermathecae close to copulatory openings in dorsal view.

Distribution

China ( Yunnan Province, Fig. 42 View Fig ).