Ptocasius tengchongensis Yang & Peng 2023, sp. nov.
Creators: name: Yang, Su-Fang
name: Peng, Xian-Jin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Ptocasius
Ptocasius tengchongensis

description: Ptocasius tengchongensis sp. nov.
urn:lsid:zoobank.org:act: BCCDBA23-A7BE-42DB-97D6-68C4F5C8C0DF
Figs 31–33, 44
Diagnosis
The male of the new species resembles that of P. pseudoflexus (Liu, Yang & Peng, 2016) (Liu et al. 2016: figs 13–17), but can be distinguished by: (1) embolus originating at about 8:00 o’clock position in ventral view (Figs 31B, 33A), while originating at about 9:00 o’clock in P. pseudoflexus (Liu et al. 2016: figs 15, 17); (2) the median area of the genital bulb with a conic bulge in retrolateral view (Figs 31C, 33B), while absent in P. pseudoflexus (Liu et al. 2016: figs 14, 16). The female of the new species resembles that of P. pseudoflexus (Liu et al. 2016: figs 19–24), but can be distinguished by: (1) pockets close to copulatory openings, almost two times as wide as long in ventral view (Figs 32B, 33D), while away from posterior margin of copulatory openings, almost as long as wide in P. pseudoflexus (Liu et al. 2016: figs 20, 22); (2) top of pockets below anterior margin of copulatory openings in ventral view (Figs 32B, 33D), while above anterior margin of copulatory openings in P. pseudoflexus (Liu et al. 2016: figs 20, 22).
Etymology
The specific name is derived from the type locality Tengchong County.
Type material
Holotype
CHINA • ♂; Yunnan Province, Tengchong County, Old Pass, 28 km East of Tengchong; 24º57′00″ N, 98º45′00″ E; 2300 m a.s.l.; 26–31 Oct. 1998; Charles Griswold, David Kavanaugh and Chun-lin Long leg.; HNU-98–OP–2A.
Paratypes (6 ♂♂, 6 ♀♀)
CHINA – Yunnan Province • 4 ♂♂, 3 ♀♀; same collection data as for holotype; HNU-98–OP–2P • 2 ♀♀; Tengchong County, Nankang; 24º49′00″ N, 98º46′59″ E; 2100 m a.s.l.; 4–7 Nov. 1998; Charles Griswold, David Kavanaugh and Chun-lin Long leg.; HNU-NK–21 • 1 ♂; Tengchong County, Old Pass, 28 km East of Tengchong; 24º57′00″ N, 98º45′00″ E; 2300 m a.s.l.; 26–31 Oct. 1998; Charles Griswold, David Kavanaugh and Chun-lin Long leg.; HNU-98–OP–23 • 1 ♀; Tengchong County, Old Pass, 28 km East of Tengchong; 24º57′00″ N, 98º45′00″ E; 2300 m a.s.l.; 26–31 Oct. 1998; Charles Griswold, David Kavanaugh and Chun-lin Long leg.; HNU-98–OP–24 • 1 ♂; 9 km Southeast of Pianma; 25º59′38″ N, 98º39′49″ E; 2400 m a.s.l.; 15–17 Oct. 1998; Charles Griswold, David Kavanaugh and Chun-lin Long leg.; HNU-98–EP–34.
Description
Male (holotype)
BODY AND HEAD. Total length 5.40. Prosoma 2.60 long, 1.90 wide. Opisthosoma 2.80 long, 1.70 wide. Clypeus height 0.15. Carapace (Fig. 31A) brown, sides with white hairs; carapace margin and eyes base black; three yellowish-brown longitudinal bands present in median and lateral areas, respectively; ocular area with black lateral margins, anterior area covered with dense white and sparse brown rough hairs. Fovea reddish brown, line-shaped. Cervical groove indistinct, radial groove dark brown. Eye diameter and interdistances: AME 0.50, ALE 0.30, PLE 0.30, AERW 1.70, PERW 1.60, EL 1.10. Sternum scutiform, densely covered with short brown hairs; margin dark brown. Clypeus dark brown, covered with long brown hairs, promargin with sparse hairs. Endites have a brown base, distal area greenish brown, densely covered with dark brown hairs. Labium dark brown, distal area brown, covered with dark brown hairs.
CHELICERAE (Fig. 33C). Brown to dark brown, covered with brown hairs; two promarginal teeth one retromarginal denticle.
LEGS. Yellowish brown to dark brown, tibiae I dark brown, femur dark brown; bearing numerous long spines. Tibiae I and II with three pairs of long ventral spines, metatarsi I and II with two pairs of ventral spines.
LEG MEASUREMENTS. I = 4.55 (1.65, 2.20, 1.00, 0.70), II = 4.80 (1.60, 1.80, 0.80, 0.60), III = 4.90 (1.60, 1.60, 1.00, 0.70), IV = 5.40 (1.75, 1.75, 1.20, 0.70). Leg formula: IV–III–II–I.
ABDOMEN (Fig. 31A). Cylindric, dorsum yellowish brown, with three pairs of sigillae; each side with a grayish black longitudinal band and many black twills; the posterior portion with arc markings; ventral yellowish white with many black spots; the median area with a black longitudinal band, sides with few black twills. Spinnerets dark brown.
PALP (Figs 31B–C, 33A–B). Longer than wide; embolus slender, originating at about 8:00 o’clock position; genital lobe protrusive; the median area of genital bulb with a triangular outgrowth in retrolateral view; tibial apophysis needle-shaped.
Female (paratypes)
BODY AND HEAD. Total length 5.40. Prosoma 2.40 long, 1.85 wide. Opisthosoma 3.00 long, 1.90 wide. Clypeus (Fig. 32A) height 0.15. Eye diameter and interdistances: AME 0.50, ALE 0.30, PLE 0.25, AERW 1.65, PERW 1.55, EL 1.00. Clypeus height 0.15.
LEG MEASUREMENTS. I = 4.30 (1.40, 1.70, 0.70, 0.50), II = 3.90 (1.30, 1.50, 0.60, 0.50), III = 4.80 (1.40, 1.70, 0.90, 0.80), IV = 5.20 (1.60, 1.90, 1.00, 0.70). Leg formula: IV–III–I–II.
ABDOMEN (Fig. 32A). Female body slightly colored, markings and other morphological features same as in male.
EPIGYNUM (Figs 32B–C, 33D–E). As long as wide; pockets long angular, distinctly close to copulatory openings; top of pockets almost close to anterior margin of copulatory openings; copulatory openings ()-shaped.
Distribution
China (Yunnan Province, Fig. 44).
description: Published as part of Yang, Su-Fang & Peng, Xian-Jin, 2023, A review of the Ptocasius Simon, 1885 spiders of Gaoligong Mountains, China (Araneae: Salticidae), pp. 1-61 in European Journal of Taxonomy 903 (1) on pages 43-47, DOI: 10.5852/ejt.2023.903.2321, http://zenodo.org/record/10119638