Stigmus clypeglabratus Li & Ma, 2024

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, ZooKeys 1204, pp. 313-336 : 313-336

publication ID	https://doi.org/ 10.3897/zookeys.1204.123831
publication LSID	lsid:zoobank.org:pub:B1FBD39B-E01A-4B0C-AA01-36DC49A609A4
DOI	https://doi.org/10.5281/zenodo.11551321
persistent identifier	https://treatment.plazi.org/id/A5CB1E7E-541A-4D20-ABB4-E62DBDE9ABA6
taxon LSID	lsid:zoobank.org:act:A5CB1E7E-541A-4D20-ABB4-E62DBDE9ABA6
treatment provided by	ZooKeys by Pensoft
scientific name	Stigmus clypeglabratus Li & Ma
status	sp. nov.

Treatment

Stigmus clypeglabratus Li & Ma sp. nov.

Figs 2 A – M View Figure 2 , 7 C, D View Figure 7

Type material.

Holotype: China • ♀; Shaanxi, Hanzhong City, Liuba County, Zibai Mountain ; 33 ° 40 ′ N, 106 ° 43 ′ E; 3. VIII. 2004; 1632 m elev.; coll. Min Shi; sweep net ( YNAU) GoogleMaps . Paratypes: 3 ♂♂, same data as for holotype, except coll. Min Shi, Qiong Wu ( YNAU) GoogleMaps .

Diagnosis.

Differs from S. japonicus Tsuneki, 1954 by hindwing media diverging before cu-a; lateral surface of propodeum smooth and shiny anteriorly and medially; pronotal collar with incomplete lateral rugae, just distinct in posterior area; gena impunctate dorsally; opaque area larger than hind ocellus; in male, clypeus smooth and impunctate, and with several setae on free margin, yellowish and short; in female, pygidial area smooth, impunctate. Stigmus japonicus has the following characters: hindwing media diverging beyond cu-a; lateral surface of propodeum with dense, slender or sturdy, oblique, longitudinal rugae anteriorly and medially; pronotal collar without lateral rugae; gena with sparse, midsize punctures dorsally; opaque area smaller than hind ocellus; in male, clypeus with dense, tiny punctures, setae on clypeus dense, silvery, and short; in female, pygidial area with two lines of large punctures medially.

Description.

Female. Measurements. ♀, BL: 4.2 mm; HW: HLD: HLF = 61: 36: 47; HW: EWd: EW: TW: EL = 61: 16: 21: 16: 39; POD: OOD: OCD = 5: 11: 16; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 18: 6: 6: 3: 7: 3.5; PL: PW: LTI: WTI: HFL: HTL = 26: 8: 32: 35: 35: 40. ♂, BL: 3–3.8 mm; HW: HLD: HLF = 63: 32: 48; HW: EWd: EW: TW: EL = 63: 19: 23: 13: 41; POD: OOD: OCD = 6.5: 11: 14; length of scape: length of pedicel: length of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 16: 7: 5: 3: 6: 3; PL: PW: LTI: WTI: HFL: HTL = 26: 8: 29: 34: 34: 40.

Color pattern. Body black; clypeus with reddish brown band subapically; mandible yellowish except reddish brown apically; labrum and dorsal scape fulvous; palpi and ventral scape ivory; pedicel, pronotal lobe, tegula and forewing veins yellowish; flagellomeres beneath and I-II above fulvous, remainder reddish brown; fore and mid legs: yellowish to fulvous except outer margin of femur somewhat brown, coxa dark brown largely; hind leg: coxa apically, trochanter, basal 1 / 2 of tibia, tarsi yellowish to fulvous, remainder dark brown; gaster dark brown, gastral sterna IV – VI bright yellow largely; setae on clypeal margin and mandible sparse, golden and long.

Head. Mandible tridentate apically, median tooth large. Labrum with two distinct triangular teeth apically (Fig. 2 A View Figure 2 ). Clypeus smooth, shiny, flat; free margin of clypeus slightly produced and with two triangular teeth medially, slightly reflected, area between two teeth with shallow emargination (Fig. 2 A View Figure 2 ). Scapal hollow shiny, shallow, and broad, not clearly defined, provided with one vestigial minute tubercle medially; frontal furrow vestigial; median and upper frons shiny, with sparse, tiny punctures (Fig. 2 A View Figure 2 ). Ocellar triangle area flat, shiny, impunctate, area near eyes with dense, short, impressed lines, opaque area smaller than hind ocellus (Fig. 2 B View Figure 2 ). Vertex shiny, with sparse, tiny punctures (Fig. 2 B View Figure 2 ). Gena shiny, impunctate. Head from above with temples rarely convergent posteriorly, subquadrate (Fig. 2 B View Figure 2 ). Occipital carina incomplete, not ending to midventral line, suddenly ended at posterior ridge of stomal hollow, not dentate, occipital carina much narrowed, not crenulate. Inner and outer orbital furrows lacking (Fig. 2 A View Figure 2 ).

Mesosoma. Pronotal collar with strong, transverse carina anteriorly, and with incomplete lateral rugae, only distinct in posterior area, without antero-lateral corner (Fig. 2 C View Figure 2 ). Scutum moderately matt, with sparse, tiny punctures; admedian line distinctly impressed, extending to 2 / 5 scutum length; notaulus deeply grooved and crenulate, reaching quarter of scutum length; parapsidal line weakly impressed (Fig. 2 C View Figure 2 ). Scutellum shiny, with sparse, fine punctures, and median longitudinal line weakly impressed (Fig. 2 C View Figure 2 ). Metanotum weakly coriaceous (Fig. 2 C View Figure 2 ). Mesopleuron smooth and shiny, posterior area smooth without rugae, episcrobal area with dense, slender, longitudinal rugae posteriorly; scrobal suture, omaulus and hypersternaulus broadened, slightly crenate, scrobal suture complete (Fig. 2 D View Figure 2 ). Propodeal enclosure triangular medially, and with three sturdy, longitudinal rugae and sparse, irregular, transvers rugae, lateral area with irregular, short rugae; posterior surface of propodeum with sturdy reticulation, and without conspicuous median groove (Fig. 2 E View Figure 2 ); lateral surface of propodeum smooth and shiny anteriorly and medially, and with irregular reticulation posteriorly (Fig. 2 D View Figure 2 ).

Legs. Outer surface of hind tibia with three long, slender, fulvous to dark brown spines.

Wings. Forewing venation typical for genus Stigmus , hindwing media diverging before cu-a.

Metasoma. Dorsal surface of petiole subquadrate, gently convex and widened toward apex slightly, and with two sturdy oblique, longitudinal carinae forming V-shaped medially, area between V-shaped carinae with irregular rugae, medial and posterior areas with a few sturdy, longitudinal rugae on each side (Fig. 2 F View Figure 2 ); lateral surface of petiole with several strong, longitudinal rugae medially and posteriorly (Fig. 7 C View Figure 7 ); ventral surface of petiole with four strong, short, longitudinal rugae posteriorly. Gastral terga shiny, impunctate, gastral sternum VI moderately matt, and with dense fine punctures (Fig. 2 G View Figure 2 ). Pygidial area smooth and shiny, broadly triangular (Fig. 2 G View Figure 2 ).

Male. Almost same as female except mandible fulvous basally and medially; fore and mid legs yellowish to fulvous; hind femur dark brown largely, remainder yellowish; mandible bidentate apically; clypeus moderately convex, clypeal margin broadly produced, and nearly truncate medially (Fig. 2 H View Figure 2 ); head from above with temples gradually convergent posteriorly (Fig. 2 I View Figure 2 ); occipital carina narrowed, distinctly crenulate dorsally, and ventral area somewhat broadened, coarsely crenate (Fig. 2 I View Figure 2 ); flagellomeres without tyloids, setae normal (Fig. 2 I View Figure 2 ).

Distribution.

China (Shaanxi).

Etymology.

The name, clypeglabratus, is derived from the Latin clype - (= clypeus) and the Latin word glabratus (= smooth), referring to the smooth and impunctate clypeus.