Ptocasius umbellulatus, 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 : 47-50

Ptocasius umbellulatus sp. nov.

urn:lsid:zoobank.org:act:

Figs 34–35 , 45

Diagnosis

The new species resembles P. davidi sp. nov. ( Figs 8–9 ), but can be distinguished by: (1) anterior interval of copulatory openings slightly wider than posterior interval in ventral view ( Figs 34B , 35A ), while three times as wide as posterior interval in P. davidi ( Figs 8B , 9A ); (2) posterior margin of pockets almost two times as wide as long in ventral view ( Figs 34B , 35A ), while almost as long as wide in P. davidi ( Figs 8B , 9A ); (3) copulatory ducts L-shaped in ventral view ( Figs 34B , 35A ), while S-shaped in P. davidi ( Figs 8B , 9A ).

Etymology

The specific name is derived from the combination of the Latin noun ‘ umbella ’ (‘parasol’) and the adjective ‘ latus ’ (‘broad’), referring to the form of the pockets and copulatory tube.

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–9A.

Paratypes ( 25 ♀♀)

CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-00–QF–10P • 1 ♀; 0.4 km Southeast from Shibali , guesthouse; 27°09′48″ N, 98°46′55″ E; 2475 m a.s.l.; 5 May 2004; Charles Griswold and David Kavanaugh leg.; HNU-CGY30 • 5 ♀♀; Gongshan County, Dulongjiang Township, Mokewang bridge; 27º50′17″ N, 98º19′15″ E; 1455 m a.s.l.; 6–7 Nov. 2004; Guo Tang leg.; HNUTang–04–08 • 1 ♀; Gongshan County, Dabadi of new road; 27º28′30″ N, 98º18′04″ E; 3013 m a.s.l.; 12 Nov. 2004; Guo Tang leg.; HNU-Tang–04–11 • 2 ♀♀; Gongshan County, Heiwadi of new road; 27º28′15″ N, 98º21′19″ E; 1850 m a.s.l.; 13–16 Nov. 2004; Guo Tang leg.; HNU-Tang–04–12B • 4 ♀♀; Lushui County, Pianma Township, Chanyan He , 9.3 km Southeast of Pianma; 25°59′37″ N, 98°39′59″ E; 2470 m a.s.l.; 14 May 2005; Charles Griswold leg.; mixed broadleaf deciduous and evergreen forest; beating understory vegetation; HNU-CGY107 • 1 ♀; Tengchong County, Jietou Township, Datang Village , Daheling Ganjiao camping site; 25°25′39″ N, 98°24′46″ E; 1952 m a.s.l.; 20 May 2006; Xin-ping Wang and Peng Hu leg.; HNU-Wang060520 • 3 ♀♀; Longling County, Longjiang Township, Xiaoheishan Nature Reserve ( Guchengshan Mountain ); 24º49′43″ N, 98º45′33″ E; 2010 m a.s.l.; 26 May 2005; Heng-mei Yan leg.; in the forest; HNU-GKJ026–3 • 2 ♀♀; Fugong County, Lumadeng Township, Yakou of old Shibali ; 27º03′51″ N, 98º45′04″ E; 3270 m a.s.l.; 13 Aug. 2005; Guo Tang leg.; HNUTang–05–06A • 1 ♀; Tengchong County, Qushi Township, Daba Village ; 25°17′13″ N, 98°42′10″ E; 2170 m a.s.l.; 14 May 2006; Chang-min Yin, Jia-fang Hu and Ming-wei Yang leg.; HNU-YHY01 • 1 ♀; Tengchong County, Mingguang Township, Zizhi Village ; 25°46′57″ N, 98°36′58″ E; 2200 m a.s.l.; 21 May 2006; leg Ming-wei Yang leg.; HNU-YHY10 • 1 ♀; Gongshan County, Du Longjiang Township, Maku ; 27º41′07″ N, 98º18′15″ E; 1814 m a.s.l.; 28 Aug. 2006; Peng Hu leg.; HNU-Hu060828 • 1 ♀; Gongshan County, Dulongjiang Township, Maku ; 27º40′42″ N, 98º17′50″ E; 1970 m a.s.l.; 30 Aug. 2006; Peng Hu leg.; HNU-Hu060830 • 1 ♀; Gongshan County, Dulongjiang Township, Maku ; 27º41′09″ N, 98º17′47″ E; 2097 m a.s.l.; 2 Sep. 2006; Peng Hu leg.; HNU-Hu060902–2 .

Description

Female ( holotype)

BODY AND HEAD. Total length 5.80. Prosoma 2.10 long, 1.60 wide. Opisthosoma 3.70 long, 2.20 wide. Clypeus height 0.10. Carapace ( Fig. 34A ) light brown, carapace margin and eyes base black; with a pair of dark longitudinal bands extending from back of ALE to retromargin of carapace; ocular area covered with sparse long black hairs, lateral margins black. Fovea reddish brown, longitudinal bar-shaped. Radial groove distinct; ocular area sparsely covered with long black hairs. Eye diameter and interdistances: AME 0.50, ALE 0.25, PLE 0.25, AERW 1.45, PERW 1.35, EL 0.90. Sternum scutiform, covered with fine grayish black hairs; the median area slightly bulged, greenish brown; margin grayish brown. Clypeus light brown with long brown hairs covering the area between the AMEs and a row of long white hairs covering the promargin. Endites and labium light brown, distal area covered with grayish black hairs.

CHELICERAE ( Fig. 35C ). Brown, distal area covered with dense long dark brown hairs; two promarginal teeth and one retromarginal denticle.

LEGS. Yellowish brown to dark brown, annuli grayish black; spines 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 = 3.65 (1.15, 1.50, 0.50, 0.50), II = 3.40 (1.10, 1.30, 0.50, 0.50), III = 4.10 (1.30, 1.30, 0.80, 0.70), IV = 4.60 (1.40, 1.50, 0.90, 0.70). Leg formula: IV–III–I–II.

ABDOMEN ( Fig. 34A ). Long ovoid, dorsum light yellow; each side with a grayish black longitudinal band and black twills; the posterior portion with three grayish black herring bones, the posterior end with a grayish black spot; with two pairs of small, reddish brown sigillae; ventral light yellow; the median area with a grayish black longitudinal band, sides with irregular grayish black markings and twills. Spinnerets dark brown.

EPIGYNUM ( Figs 34B–C , 35A–B ). As long as wide; the pockets present below, relatively diverging from copulatory openings, posterior margin of pockets almost two times as wide as long; copulatory openings V-shaped; copulatory ducts L-shaped in ventral view.

Male

Unknown.

Distribution

China ( Yunnan Province, Fig. 45 ).

Figures

Fig. 34. Ptocasius umbellulatus sp. nov., holotype, ♀ (HNU-00–QF–9A). A. Body, dorsal view. B. Epigynum, ventral view. C. Vulva, dorsal view. Scale bars: A = 0.5 mm; B–C = 0.1 mm.

Fig. 35. Ptocasius umbellulatus sp. nov., holotype, ♀ (HNU-00–QF–9A). 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. 8. Ptocasius davidi sp. nov., holotype, ♀ (HNU-00–QF–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. 9. Ptocasius davidi sp. nov., holotype, ♀ (HNU-00–QF–3A). A. Epigynum, ventral view. B. Vulva, dorsal view. C. Chelicerae, posterior view. Scale bars = 0.1 mm.