Passaloecus sternoleios 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 sternoleios

description: Passaloecus sternoleios Li & Ma sp. nov.
Figs 5 A – H
Type material.
Holotype: China • ♀; Guangdong, Qingyuan City, Fogang County, Guanyin Mountain; 23°58'12"N, 113°33'49"E; 353 m elev.; 15–16. IX. 2007; Yellow Plates (YNAU). Paratype: China • 1 ♀; Guangdong, Shaoguan City, Nanling National Nature Reserve; 24°54'49"N, 113°2'30"E; 845 m elev.; 23. V. 2020; coll. Fei Ye; flight intercept traps (YNAU).
Diagnosis.
This species differs from P. insignis (Vander Linden, 1829) and other congeners by these characteristics: petiole conspicuously longer than width; inner and outer orbital furrows broad, marginal carina conspicuous, outer orbital furrow distinctly crenate; occipital carina broad, conspicuous crenate; notaulus lacking; sternum I smooth, without carina and rugae. Passaloecus insignis has the following characters: petiole not longer than width; inner and outer orbital furrows lacking; occipital narrow, not crenate; notaulus shallowly impressed, crenate; sternum I with sturdy, median, longitudinal carina and several, short, longitudinal rugae.
Description.
Female. Measurements. ♀, BL: 7.8 mm; HLF: HW: HLD = 73: 78: 30; HW: EWd: EW: TW: EL = 78: 20: 26: 33: 60; POD: OOD: OCD = 10: 13: 16; SL: PL: LFI: LFII: WFI: WFII = 28: 6: 7: 7: 5: 5; WAS: AOD: IAD = 6: 5: 7; EDU: EDL = 42: 32; PLL: PW: LTI: WTI = 25: 10: 40: 52.
Color pattern. Body black; mandible ivory except apex yellowish-brown to reddish-brown; central part of labrum with ivory, V-shaped stripe, remainder yellowish-brown; palpi ivory to pale yellow; ventral scape and pronotal lobe ivory; dorsal scape, pedicel, flagellum, tegula, forewing veins yellowish-brown to dark brown; fore leg: apex of trochanter ivory, remainder dark brown, femur dark brown except base and apex yellowish-brown to brown, tibia and tarsus pale yellow to yellowish-brown; mid and hind legs: apex of trochanter, base of femur, ventral tibia and tarsus yellowish-brown, remainder dark brown; sides of lower frons and clypeus with scattered, silvery, short setae; clypeus with sparse, golden, short setae, and interspersed with several golden, long setae apically; labrum with several, golden, long setae apically.
Head. Mandible bidentate apically, inner tooth large (Fig. 5 A). Labrum slightly narrower than clypeal lobe, heart-shaped, distinctly constricted subapically (Fig. 5 A). Clypeus slightly convex medially, coriaceous; free margin of clypeus broadly produced, semicircular (Fig. 5 A). Sides of lower frons coarsely coriaceous, and with irregular, longitudinal rugae; scapal hollow coriaceous, shiny, slightly deep, clearly defined; interantennal tubercle narrow and short; median and upper frons coarsely coriaceous, with sparse, irregular, transverse rugae, frontal median carina strong, extending to anterior ocellus (Fig. 5 A). Ocellar triangle shiny, moderately convex, with sparse, fine to midsize punctures (Fig. 5 B). Vertex shiny, with sparse, fine punctures (Fig. 5 B). Gena shiny, coriaceous, with sparse, indistinct, midsize punctures. Occipital carina broad, conspicuously crenate (Fig. 5 B). Inner orbital furrow broad, smooth, shiny, boundary carina distinct (Fig. 5 A); outer orbital furrow broad, distinctly crenate, boundary carina distinct (Fig. 5 H).
Mesosoma. Anterior margin of pronotal collar with strong, arcuate, transverse carina, antero-lateral corner markedly produced (Fig. 5 C). Scutum coarsely coriaceous, with dense, fine to midsize punctures, posterior area with several, indistinct, very short, longitudinal rugae; scutal patches absent; admedian line robust, distinctly raised, extending to 1 / 3 of scutum length; notaulus lacking; parapsidal line distinctly impressed, slightly shorter than admedian line (Fig. 5 C). Scutellum shiny, with dense, fine punctures (Fig. 5 C). Metanotum smooth and shiny (Fig. 5 C). Mesopleuron shiny, with scattered fine punctures, posterior area with contiguous, short, longitudinal rugae; scrobal suture lacking; hypersternaulus and episternal sulcus broad, conspicuously crenate; omaulus absent (Fig. 5 D). Metapleuron shiny and smooth (Fig. 5 D). Propodeal enclosure shiny, not delimited by carina, with sturdy, irregular rugae medially, and sparse, sturdy, oblique rugae laterally; posterior surface of propodeum reticulated (Fig. 5 E); lateral surface of propodeum with dense, slender, oblique rugae anteriorly, and irregular reticulation posteriorly (Fig. 5 D).
Metasoma. Petiole long, conspicuously longer than width, smooth, without carina or rugae (Fig. 5 F). Gaster shiny, and with sparse, tiny punctures; sternum I smooth and shiny, without carina or rugae (Fig. 5 G); sternum II deeply impressed basally (Fig. 5 G); gaster slightly constricted between terga I and II (Fig. 5 H); pygidial plate lacking.
Male. Unknown.
Distribution.
China (Guangdong).
Etymology.
The name sternoleios is derived from the Greek stern - (= sternum), and the Greek word leios (= smooth), referring to the sternum I smooth and shiny, without carina or rugae.
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