Bethylus glabricarinatus Wang, He & Chen, 2021

Wang, Chung-Hong, He, Jun-Hua & Chen, Xue-Xin, 2021, Taxonomy of Bethylus (Hymenoptera, Bethylidae) from China with description of nine new species, Zootaxa 4974 (2), pp. 361-382 : 368-370

Bethylus glabricarinatus Wang, He & Chen sp. nov.

Fig. 4

Description. Holotype ( Fig. 4a ). Female. Body length 4.85 mm. Forewing length 2.91 mm.

Color. Body black, metasoma dark castaneous. Mandible orange. Antenna yellow to yellowish-brown. Legs dark castaneous, tibiae and tarsi yellow. Forewing hyaline tinged with yellow; veins light castaneous to castaneous; pterostigma castaneous.

Pubescence. Body with sparse setae, denser in propleuron, mesopectus ventrally and legs. Antenna with dense appressed setae. Forewing with short dense setae.

Head ( Fig. 4 b-e). Head longer than wide, LH 1.07 × WH. Mandible with four teeth; upper most with apex straight. Median clypeal lobe with apex rounded; median clypeal carina slightly extending posterad into frons. Malar space narrow. Antennomeres II-VI in ratio of 0.95:0.83:0.93:0.89:1.0 in length and respectively 2.11, 1.82, 1.89, 1.85, 2.18 × width; antennal scrobal carina absent. Frons and vertex coriaceous with dense punctures separate less than 3.0 × their diameter. WF 1.75 × LE; LE 0.84 × DEV. Anterior ocellus far away from eyes; frontal angle of ocellar triangle acute; POL 0.94 × AOL; OOL 2.54 × WOT; DPV 3.20 × DAO. Vertex crest straight; sides of head posterior to eyes converging posteriorly. Gena coriaceous; ventral area convex with punctures less than frons.

Mesosoma ( Fig. 4 f-g). Pronotum coriaceous; dorsal pronotal area shorter than wide with shallow punctures. Mesoscutum coriaceous with punctures separate less than 3.0 × their own diameter, 0.90 × mesoscutellum; parapsidal signum complete. Mesoscutellum coriaceous with punctures; mesoscutellar pits elongate. Metapostnotum rugulose, median ridge weakly coriaceous; dorsal area of propodeum coriaceous; lateral marginal carina of metapectal-propodeal disc very weak; propodeal declivity coriaceous; anterior metapleural area coriaceous, metapleural line with two pits; lateral surface of metapectal-propodeal complex coriaceous. Propleuron coriaceous. Mesopectus coriaceous with punctures; mesopleural pit and fovea present.

Forewing ( Fig. 4h ). Rs+M 2 v vein short, almost as long as width of Rs 2 v; 2r-rs&Rs 2 v almost straight with apex abruptly curved.

Metasoma. Metasomal terga shiny with shallow tiny punctures; longitudinal sulcus of first metasomal tergum present, almost 0.5 × length of first metasomal tergum. Metasomal sterna shiny with shallow tiny punctures.

Male. Unknown.

Variation. Body length: 3.90–4.85 mm. Length of forewing: 2.61–2.98 mm. LH 1.05–1.09 × WH; WF 1.61– 1.83 × LE; LE 3.53–4.15 × DEV; POL 0.94–1.05 × AOL; OOL 2.28–2.54 × WOT; DPV 2.82–3.20 × DAO.

Type material. Holotype ♀ ( ZJUH), China, Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3– 14.vii.2009, Huayan Chen, No. 202016010 . Paratypes: ♀ ( ZJUH), Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3–14.vii.2009, Huayan Chen, No. 202016018 ; ♀ ( ZJUH), Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3–14.vii.2009, Huayan Chen, No. 202016019 .

Distribution. China (Ningxia).

Etymology. The specific name “ glabricarinatus ” compounded with two Latin words: “ glabr ” (smooth) and “ carina ” (keel) refers to the area alongside median clypeal carina shiny and slightly elevated.

Diagnosis. This species can be distinguished from other species of this genus by having LH less than 1.10× WH, median clypeal carina weak, and DPV at least 2.82 × DAO.

Figures

FIGURE 4. Bethylus glabricarinatus sp. nov. holotype, ♀. a. Habitus lateral; b. Head, frontal view; c. Mandible; d. Antenna; e. Head, lateral view; f. Mesosoma, dorsal view; g. Mesosoma, lateral view; h. Forewing. Scale bars: 0.15 mm.