Bethylus ningxicus 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 : 373-375

Bethylus ningxicus Wang, He & Chen sp. nov.

Fig. 7

Description. Holotype ( Fig. 7a ). Male. Body length 4.36 mm. Forewing length 1.94 mm.

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

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

Head ( Fig. 7 b-e). Head slightly longer than wide, LH 1.04 × WH. Mandible with four teeth; upper most one with apex straight. Median clypeal lobe with apex straight; median clypeal carina slightly extending posterad into frons. Malar space narrow. Antennomeres II–VI in ratio of 1.26:1.0:1.04:1.15:1.0 in length and respectively 2.40, 1.90, 1.93, 2.0, 1.82 × width; antennal scrobal carina absent. Frons and vertex coriaceous with shallow sparse punctures. WF 1.36 × LE; LE 1.18 × DEV. Anterior ocellus far away from eye; POL1.69 × AOL; OOL 2.01 × WOT; DPV 0.97 × DAO. Vertex crest outcurved; sides of head posterior to eyes converging posteriorly. Gena coriaceous; ventral area coriaceous with punctures less than frons.

Mesosoma ( Fig. 7f ). Pronotum coriaceous, dorsal pronotal area shorter than wide with shallow punctures. Mesoscutum coriaceous with shallow punctures; mesoscutum 0.86 × mesoscutellum; parapsidal signum complete. Mesoscutellum coriaceous with shallow punctures; mesoscutellar pits nearly oval. Metapostnotum depressing and rugulose, median ridge weakly coriaceous; dorsal area of propodeum rugulose, depressing near lateral marginal carina; lateral marginal carina complete, basal half weak; propodeal declivity coriaceous; anterior metapleural area coriaceous, metapleural line with three pits; lateral surface of metapectal-propodeal complex coriaceous. Propleuron coriaceous. Prosternum coriaceous with distinct median longitudinal sulcus. Mesopectus coriaceous with shallow punctures; mesopleural pit and fovea weak.

Forewing ( Fig. 7g ). Rs+M 2 v vein extremely short; 2r-rs&Rs 2 v almost straight with apex abruptly curved.

Metasoma. Metasomal terga shiny, weakly coriaceous basally; median longitudinal sulcus of first metasomal tergum short not exceeding first metasomal spiracle. Metasomal sterna weakly coriaceous; first metasomal sternum coriaceous with median longitudinal carina; hypopygium bilobate with median notch deep and narrow ( Fig. 7h ). Genitalia ( Fig. 7i–j ): ventral arm of paramere with long setae, apex of dorsal arm obtuse; margin of cuspis distinctly rounded in ventral view; digitus sickle-shaped, papillate dorsally; aedeagus bottle-shaped.

Female. Unknown.

Variation. Body length: 2.38–3.20 mm. Length of forewing: 1.72–2.13 mm. LH 1.04–1.10 × WH; WF 1.36– 1.53 × LE; LE 1.01–1.18 × DEV; POL 1.05–1.69 × AOL; OOL 2.01–2.25 × WOT; DPV 0.97–1.71 × DAO.

Type material. Holotype ♂ ( ZJUH), China, Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3– 14.vii.2009, Huayan Chen, No. 202016006 . Paratypes: ♂ ( ZJUH), China, Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3–14.vii.2009, Huayan Chen, No. 202016011 ; ♂ ( ZJUH), China, Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3–14.vii.2009, Huayan Chen, No. 202016012 ; ♂ ( ZJUH), China, Ningxia, Liupan Mountain , 106°20′14″E, 35°30′15″N, 3–14.vii.2009, Huayan Chen, No. 202016013 .

Distribution. China (Ningxia).

Etymology. This species is named based on the type specimen locality.

Diagnosis. This species can be distinguished from other species of this genus by having median clypeal lobe weak ( Fig. 7b ), median notch of hypopygium deep and narrow ( Fig. 7h ), and apical margin of cuspis rounded.

Figures

FIGURE 7. Bethylus ningxicus sp. nov. holotype, ♂. a. Habitus lateral; b. Head, frontal view; c. Mandible; d. Antenna; e. Head, lateral view; f. Mesosoma, dorsal view; g. Forewing; h. The seventh metasomal sternum and Hypopygium; i. Genitalia, dorsal view; j. Genitalia, ventral view. Scale bars: 0.15 mm.