Passaloecus clypearcuatus Li & Ma 2024, sp. nov.
Creators: name: Li, Jinghong
name: Ma, Li
name: Li, Qiang
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Crabronidae
Passaloecus
Passaloecus clypearcuatus

description: Passaloecus clypearcuatus Li & Ma sp. nov.
Figs 1 A – G
Type material.
Holotype: China • ♀; Yunnan, Shangri-La City, Pudacuo National Park; 27°55'13"N, 99°52'46"E; 3515 m elev.; 16. VII. 2022; coll. Zhizhi Liu; sweep net (YNAU). Paratype: China • 1 ♀; Shaanxi, Baoji City, Tiantai Mountain Scenic Area; 34°17'10"N, 107°10'55"E; 852 m elev.; 8–10. VI. 1998; NO. 983654; coll. Yun Ma; sweep net (YNAU).
Diagnosis.
This species differs from the similar species P. labrinigratus Ma & Li, 2012 and other congeners in the following characteristics: free margin of clypeus with two robust, triangular teeth medially, distinctly reflected, area between two teeth deeply concave; scutal patches absent; scutum with sparse, irregular, short, longitudinal rugae posteriorly; scapal hollow coriaceous, shiny and clearly defined; gaster not constricted between terga I and II. Passaloecus labrinigratus has the following characters: free margin of clypeus broadly produced, truncate medially; scutal patches ovate; scutum smooth, without rugae posteriorly; scapal hollow coarsely coriaceous, moderately matte, not clearly defined; gaster slightly constricted between terga I and II.
Description.
Female. Measurements. ♀, BL: 7.7 mm; HLF: HW: HLD = 63: 80: 51; HW: EWd: EW: TW: EL = 80: 15: 20: 28: 49; POD: OOD: OCD = 13: 13: 23; SL: PL: LFI: LFII: WFI: WFII = 29: 7: 12: 11: 6: 6; WAS: AOD: IAD = 6: 10: 14; EDU: EDL = 47: 49; PLL: PW: LTI: WTI = 10: 13: 55: 48.
Color pattern. Body black; mandible inner margin pale yellow, remainder reddish-brown to dark brown; labrum ivory medially, central part dark brown; ventral scape ivory to pale yellow; tegula, palpi and forewing veins dark brown; fore tibia and tarsus dark brown; mid leg: inner margin of femur, tibia, and tarsus pale yellow to yellowish-brown, remainder of femur and trochanter dark brown; basal 1 / 4 of hind tibia dark brown; clypeus with scattered, silvery, short setae.
Head. Mandible bidentate apically, inner tooth large (Fig. 1 A). Labrum slightly narrower than clypeal lobe, V-shaped, apex bluntly rounded, slightly constricted subapically (Fig. 1 A). Clypeus flat, with sparse, fine punctures, slightly coriaceous; free margin of clypeus with two robust, triangular teeth medially, distinctly reflected, area between two teeth deeply concave (Fig. 1 A). Sides of lower frons slightly coriaceous; scapal hollow coriaceous, shallow, clearly defined; interantennal tubercle very short; frontal median carina absent; median and upper frons distinctly coriaceous, with dense, large punctures, sometimes contiguous (Fig. 1 A). Ocellar triangle coarsely coriaceous, slightly convex, and with dense, midsize punctures (Fig. 1 B). Vertex distinctly coriaceous, with dense, midsize punctures and weakly transverse striations (Fig. 1 B). Dorsal gena coarsely coriaceous, with dense, fine to midsize punctures; ventral gena coarsely coriaceous, with midsize punctures. Occipital carina narrow, not crenate (Fig. 1 B). Inner and outer orbital furrows lacking (Fig. 1 A).
Mesosoma. Pronotal collar with robust, anterior, transverse carina, antero-lateral corner slightly produced (Fig. 1 C). Scutum coarsely coriaceous, with dense, midsize punctures, anterior area nearly right angle, significantly higher than pronotum, posterior area with sparse, irregular, short, longitudinal rugae; scutal patches absent; admedian line distinctly impressed, extending to 1 / 3 of scutum length; notaulus shallowly impressed, indistinctly crenulate, extending to 1 / 3 of scutum length; parapsidal line distinct, longer than admedian line (Fig. 1 C). Scutellum slightly coriaceous, with dense, midsize punctures (Fig. 1 C). Metanotum slightly coriaceous, with dense, fine punctures (Fig. 1 C). Mesopleuron coarsely coriaceous, with dense, midsize punctures, posterior area with sparse, very short, longitudinal rugae; scrobal suture deeply impressed, not crenate; hypersternaulus and episternal sulcus distinctly crenate; omaulus absent (Fig. 1 D). Metapleuron shiny and smooth (Fig. 1 D). Propodeal enclosure not delimited by carina, with irregular rugae medially, and several, robust oblique rugae laterally; posterior surface of propodeum with irregular rugae, interspersed with several, robust, transverse rugae (Fig. 1 E); lateral surface of propodeum with dense, slender, irregular, oblique rugae anteriorly, and sparse, robust, oblique rugae posteriorly (Fig. 1 D).
Metasoma. Petiole short, not longer than width; dorsal surface of petiole with median, longitudinal groove (Fig. 1 F); lateral surface of petiole with two short, longitudinal carinae (Fig. 1 G). Gaster moderately matte, slightly coriaceous, with dense, fine punctures (Fig. 1 G); sternum I with several, longitudinal rugae; median, longitudinal carina lacking; sternum II deeply impressed basally; gaster not constricted between terga I and II (Fig. 1 G); pygidial plate lacking.
Male. Unknown.
Distribution.
China (Yunnan, Shaanxi).
Etymology.
The name clypearcuatus is derived from the Latin clype - (= clypeus) and the Latin word arcuatus (= arcuate), referring to the area between two teeth on free margin of clypeus with an arcuate, deep concavity.
description: Published as part of Li, Jinghong, Ma, Li & Li, Qiang, 2024, Five new species of Passaloecus Shuckard (Hymenoptera, Crabronidae) from China, with a key to Chinese species, pp. 1141-1161 in Journal of Hymenoptera Research 97 on pages 1141-1161, DOI: 10.3897/jhr.97.135489