Ptocasius angulatus 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 angulatus

description: Ptocasius angulatus sp. nov.
urn:lsid:zoobank.org:act: ADD08C18-F5BB-443A-9F52-11DF387097FD
Figs 1–2, 41
Diagnosis
The new species resembles P. strupifer Simon, 1901 (Peng 2020: fig. 275a–g), but can be distinguished by: (1) pockets present anteriorly parallel to copulatory openings in ventral view (Figs 1B, 2A), while pockets present in median area below copulatory openings in P. strupifer (Peng 2020: fig. 275f); (2) lateral margins of spermathecae extending dorso-laterally outside of copulatory ducts in dorsal view (Figs 1C, 2B), while spermathecae dorso-median inside of copulatory ducts in P. strupifer (Peng 2020: fig. 275f–g).
Etymology
The specific name derives from the Latin adjective ‘ angulatus ’ (‘provided with angles’).
Type material
Holotype
CHINA • ♀; Yunnan Province, 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–1A.
Paratype (1 ♀)
CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-98–EP– 1P.
Description
Female (holotype)
BODY AND HEAD. Total length 4.10. Prosoma 2.10 long, 1.60 wide. Opisthosoma 2.30 long, 1.45 wide. Clypeus height 0.10. Carapace (Fig. 1A) brown, sides with dense white hairs; carapace margins and eye base black; ocular area covered with long rough dark brown hairs, anterior and lateral margins black with dense white hairs. Fovea short, reddish brown, cervical groove indistinct, radial groove dark brown, distinct. Eye diameter and interdistances: AME 0.50, ALE 0.25, PLE 0.25, AERW 1.50, PERW 1.40, EL 0.90. Sternum olive-shaped, densely covered with short brown hairs; median area bulged and light yellow, margin grayish yellow. Clypeus light brown with grayish black markings; anterior margin with long white hairs, narrow, height less than ½ AME. Endites and labium brown, distal area light brown, covered with black hairs.
CHELICERAE (Fig. 2C). Dark brown, distal area covered with long brown hairs, two promarginal teeth and one retromarginal denticle.
LEGS. No visible markings or annuli, light yellowish brown to brown. 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 = 3.40 (1.10, 1.40, 0.50, 0.40), II = 3.30 (1.10, 1.30, 0.50, 0.40), III = 3.90 (1.30, 1.30, 0.80, 0.50), IV = 4.30 (1.40, 1.40, 1.00, 0.50). Leg formula: IV–III–I–II.
ABDOMEN (Fig. 1A). Oval, dorsum yellowish brown with dark brown markings, sides with dark longitudinal bands, marginal area with one light incision; cardiac marking long and bar-shaped, the terminal area with black spots, mid-dorsally with two pairs of sigillae; ventral grayish white, the median area with a gray longitudinal band, lateral dark brown. Spinnerets brown.
EPIGYNUM (Figs 1B–C, 2A–B). Longer than wide; with angular pockets present antero-laterally; copulatory openings longitudinal, outline almost U-shaped, spermathecae sinuous, much complicated and close to each other, extending dorso-laterally, the distance between the margins of spermathecae indistinctly wider than that between the copulatory ducts.
Male
Unknown.
Distribution
China (Yunnan Province, Fig. 41).
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 5-7, DOI: 10.5852/ejt.2023.903.2321, http://zenodo.org/record/10119638