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

description: Stigmus sulciconspicus Li & Ma sp. nov.
Figs 5 A – G, 8 B
Type material.
Holotype: China • ♀; Baoshan City, Longyang District, Lujiang Country, Gaoligong Mountain; 24 ° 57 ′ N, 98 ° 50 ′ E; 20–21. VII. 2006; 938 m elev.; coll. Li Ma; Yellow plate (YNAU). Paratypes: China • 1 ♀, same data as for holotype.
Diagnosis.
Distinguished from S. interruptus Bashir & Ma, 2019 by the following combination of characters: anterior area of pronotal collar with complete, sturdy, transverse carina; scutum shiny, with sparse, midsize punctures mixed with a few large punctures, without wrinkle; scrobal suture inconspicuous, just single longitudinal striation; in female, pygidial area shiny, impunctate and without striations. Stigmus interruptus has the following characters: anterior area of pronotal collar with incomplete, sturdy, transverse carina, narrowly emarginated in middle; mesoscutum moderately matt, with sparse, large punctures, anterior and posterior areas with dense, longitudinal micro-striations; scrobal suture broadened, distinctly crenate; in female, pygidial area with weakly longitudinal striations, basal area with several large punctures.
Description.
Female. Measurements. ♀, BL: 4.7 mm; HW: HLD: HLF = 85: 60: 65; HW: EWd: EW: TW: EL = 85: 23: 24: 31: 65; POD: OOD: OCD = 9: 15: 16; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 27: 11: 8: 5: 8: 5; PL: PW: LTI: WTI: HFL: HTL = 42: 15: 46: 49: 49: 60.
Color pattern. Body black; clypeus with reddish brown band subapically; mandible yellowish except reddish brown apically; labrum dark brown; palpi yellowish; antenna, tegula, forewing veins and gaster apically fulvous to brown; pronotal lobe white; fore and mid legs: yellowish except coxa largely dark brown; hind leg: coxa largely and femur medially brown, remainder yellowish; clypeal margin and mandible with sparse golden setae.
Head. Mandible tridentate apically, median tooth large. Labrum with two distinct, triangular teeth apically (Fig. 5 A). Clypeus shiny, moderately convex, and with sparse, fine punctures mixed with several large punctures; free margin of clypeus slightly produced and with two distinct, cornuted teeth medially, slightly reflected, slightly emarginated in middle (Fig. 5 A). Scapal hollow shiny, shallow, broad, and not clearly defined, provided with one vestigial, minute tubercle medially, not spined (Fig. 5 A). Frontal furrow weakly impressed, inconspicuous (Fig. 5 A). Median and upper frons slightly matt, finely coriaceous, and with sparse, midsize punctures, slightly convex (Fig. 5 A). Ocellar triangle area flat, shiny, with several fine punctures, area near eyes with dense, short, impressed lines, opaque area larger than hind ocellus (Fig. 5 B). Vertex shiny, with sparse, tiny punctures (Fig. 5 B). Gena shiny, with sparse, midsize to large punctures dorsally; ventral gena shiny, and with a few midsize punctures. Head from above with temples rarely convergent posteriorly, subquadrate (Fig. 5 B). Occipital carina incomplete, not ending to midventral line, suddenly ended at posterior ridge of stomal hollow, without tooth; occipital carina much narrowed, no crenulate. Inner and outer orbital furrows lacking (Fig. 5 A).
Mesosoma. Pronotal collar with strong, transverse carina anteriorly, lateral rugae lacking, without antero-lateral corner (Fig. 5 C). Scutum shiny, with sparse, midsize punctures mixed with several large punctures; admedian line distinctly impressed, extending to 5 / 12 of scutum length; notaulus deeply grooved and crenulate, reaching 1 / 4 of scutum length; parapsidal line distinctly impressed (Fig. 5 C). Scutellum shiny, with sparse, tiny punctures, median longitudinal line weakly impressed (Fig. 5 C). Metanotum finely coriaceous (Fig. 5 C). Mesopleuron shiny, with sparse, midsize punctures, posterior area smooth without rugae, episcrobal area with dense, longitudinal sculptures; scrobal suture inconspicuous, just single longitudinal rugae; hypersternaulus broadened, smooth, not crenate; omaulus broadened, distinctly crenate (Fig. 5 D). Propodeal enclosure elongate, U-shaped medially, with one strong, longitudinal, rugae and sparse, irregular, transvers rugae, and with oblique, longitudinal rugae laterally; posterior surface of propodeum with somewhat narrow, shiny, conspicuous, median groove, lateral area of median groove with sparse, oblique, longitudinal rugae, and with sparse, irregular rugae posteriorly (Fig. 5 E); lateral surface of propodeum with dense, slender, oblique longitudinal rugae (Fig. 5 D).
Legs. Outer surface of hind tibia with three long, slender, fulvous spines.
Wings. Forewing venation typical for genus Stigmus, hindwing media diverging beyond cu-a.
Metasoma. Dorsal surface of petiole subquadrate, gently convex and widened toward apex distinctly, with strong, irregular rugae and with several strong, longitudinal rugae posteriorly (Fig. 5 F); lateral surface of petiole with a few sturdy, longitudinal rugae (Fig. 8 B); ventral surface of petiole with several sturdy, longitudinal rugae posteriorly. Gastral terga shiny, terga I – V with sparse, fine punctures, tergum VI with sparse, midsize punctures apically (Fig. 5 G); gastral sterna shiny, sterna I – VI with sparse, fine punctures, sternum VI with dense, fine punctures (Fig. 5 G); pygidial area moderately matt, broadly U-shaped, apex rounded (Fig. 5 G).
Male. Unknown.
Distribution.
China (Yunnan).
Etymology.
The name, sulciconspicus, is derived from the Latin sulc - (= groove) and the Latin word conspicus (= conspicuous), referring to the posterior surface of propodeum with conspicuous median groove.
description: Published as part of Li, Jinghong, Li, Qiang & Ma, Li, 2024, Five new species of the genus Stigmus Panzer (Hymenoptera, Crabronidae) from China, with a key to all Chinese species, pp. 313-336 in ZooKeys 1204 on pages 313-336, DOI: 10.3897/zookeys.1204.123831