Passaloecus edentutus 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 edentutus

description: Passaloecus edentutus Li & Ma sp. nov.
Figs 3 A – G
Type material.
Holotype: China • ♀; Tibet, Shigatse City, Yadong County, Shang Yadong Country, Galingang Village; 27°30'28"N, 88°57'40"E; 3445 m elev.; 24. VII. 2018; NO. 202006141; coll. Shijie Du; sweep net (YNAU). Paratype: China • 1 ♀; Tibet, Shigatse City, Gyirong County, Gyirong Town, Madun Bridge; 28°23'35"N, 85°19'45"E; 2795 m elev.; 1. VIII. 2018; coll. Shijie Du; sweep net (YNAU).
Diagnosis.
This species differs from P. tuberangustus Bashir & Ma, 2019 and other congeners by these characteristics: hypersternaulus smooth, not crenate; pronotal collar with weak, anterior, transverse carina laterally; lateral surface of propodeum with dense, slender, oblique rugae anteriorly; propodeal enclosure with irregular rugae medially, and sparse, irregular, oblique rugae laterally; mesopleuron coriaceous, posterior area with sparse, indistinct, very short, longitudinal rugae. Passaloecus tuberangustus has the following characters: hypersternaulus conspicuously crenate; pronotal collar without anterior, transverse carina; lateral surface of propodeum smooth and shiny anteriorly; propodeal enclosure with dense, slender, longitudinal rugae, and interspersed with several, short, transverse rugae medially; mesopleuron coarsely coriaceous, posterior area smooth, without rugae.
Description.
Female. Measurements. ♀, BL: 6.9 mm; HLF: HW: HLD = 58: 67: 40; HW: EWd: EW: TW: EL = 67: 16: 16: 35: 43; POD: OOD: OCD = 7: 11: 18; SL: PL: LFI: LFII: WFI: WFII = 25: 7: 8: 8: 4: 5; WAS: AOD: IAD = 7: 10: 9; EDU: EDL = 49: 43; PLL: PW: LTI: WTI = 30: 7: 42: 35.
Color pattern. Body black; mandible ivory except apex reddish-brown; palpi ivory to brown; ventral scape and pronotal lobe ivory; tegula and forewing veins dark brown; all tibiae and tarsis brown to dark brown; sides of lower frons and clypeus with scattered, silvery, short setae; outer margin of the mandible with scattered golden, long setae.
Head. Mandible bidentate apically, inner tooth large (Fig. 3 A). Labrum broadly V-shaped, slightly wider than clypeal lobe, apex bluntly rounded, distinctly constricted subapically (Fig. 3 A). Clypeus smooth medially, coriaceous elsewhere; free margin of clypeus broadly produced, distinctly emarginated medially (Fig. 3 A). Sides of lower frons coarsely coriaceous; scapal hollow coriaceous, shallow, clearly defined; interantennal tubercle narrow and short; frontal median carina distinct, slightly impressed; median and upper frons coarsely coriaceous, slightly convex, with dense, fine punctures (Fig. 3 A). Ocellar triangle coarsely coriaceous, nearly flat, with dense, fine punctures (Fig. 3 B). Vertex coriaceous, with dense, weak, transverse striations (Fig. 3 B). Gena coriaceous, shiny, impunctate. Occipital carina narrow, not crenate (Fig. 3 B). Inner and outer orbital furrows lacking (Fig. 3 A).
Mesosoma. Pronotal collar with weak, anterior, transverse carina laterally, without antero-lateral corner (Fig. 3 C). Scutum coarsely coriaceous, with dense, fine punctures, anterior area nearly right angle, significantly higher than pronotum, posterior area smooth, without rugae; scutal patches absent; admedian line distinctly impressed, extending to 1 / 3 of scutum length; notaulus indistinctly impressed, slightly shorter than admedian line; parapsidal line distinctly impressed, long (Fig. 3 C). Scutellum and metanotum coriaceous and impunctate (Fig. 3 C). Mesopleuron coriaceous, posterior area with sparse, indistinct, very short, longitudinal rugae; scrobal suture reduced to single trace; hypersternaulus narrowly, weakly impressed, smooth and not crenate; episternal sulcus broad, deeply impressed and distinctly crenate; omaulus absent (Fig. 3 D). Metapleuron shiny and smooth (Fig. 3 D). Propodeal enclosure matte, not delimited by carina, with irregular rugae medially, and sparse, irregular, oblique rugae laterally; posterior surface of propodeum coarsely coriaceous and with sparse, irregular rugae (Fig. 3 E); lateral surface of propodeum with dense, slender, oblique rugae anteriorly, and sparse, robust, oblique rugae posteriorly (Fig. 3 D).
Metasoma. Petiole long, conspicuously longer than width; dorsal surface of petiole with indistinct, median, longitudinal groove (Fig. 3 F); lateral surface of petiole with two short, longitudinal carinae (Fig. 3 G). Gaster shiny, with sparse, tiny punctures; sternum I with median, longitudinal carina and two longitudinal rugae; sternum II deeply impressed basally; gaster slightly constricted between terga I and II (Fig. 3 G); pygidial plate lacking.
Male. Unknown.
Distribution.
China (Tibet).
Etymology.
The name edentutus is derived from the prefix e - (= without) and the Latin word dentutus (= dentate), referring to the hypersternaulus smooth, not crenate.
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