Sierola limatulifascia, Wang & He & Chen, 2021

Wang, Chung-Hong, He, Jun-Hua & Chen, Xue-Xin, 2021, Taxonomy of Sierola Cameron (Hymenoptera, Bethylidae) from China with three new species, Journal of Hymenoptera Research 84, pp. 405-415 : 405

Sierola limatulifascia sp. nov.

Figure 3

Material examined.

Holotype: China • ♀; Zhejiang Province, Changshan ; 28°54.42'N, 118°31.05'E; Aug. 1980; Sh.J. Yang leg.; No. 202016915.

Description.

Holotype: (Fig. 3A ). Female. Body length = 2.05 mm. Length of forewing = 1.49 mm. Color. Body castaneous. Mandible dark castaneous, teeth light castaneous. Antenna yellow, scape light castaneous dorsally, darker distad. Forewing hyaline; veins almost colorless; prestigma and pterostigma light castaneous. Pubescence. Body covered with short sparse setae, denser in dorsal surface of propleuron and mesopectus. Antenna with dense appressed setae. Forewing with dense setae; R2c and 1Cu2c with sparse setae. Head (Fig. 3B-E ). Head longer than wide, WH/LH = 0.83; DH/LH = 0.57; head thickened in lateral view. Mandible moderately narrow at base, distinctly broader on apical half, ventral margin distinctly concave; not twisted, outwardly coriaceous; apex of mandible vertical, with four equally strong teeth. Median clypeal lobe weakly protuberant with apex rounded; median clypeal carina slightly extending back into frons, recurved apically in lateral view. Antennomeres II-VI in ratio of 1.54: 0.95: 0.90: 1.02: 1.0 in length and respectively 1.62, 1.05, 0.84, 0.88, 0.89 × wide; antennal scrobal carina weak. Frons and vertex coriaceous with punctures separate 1.5-4.0 × its diameter. Eye protuberant. WF/LE = 1.12; LE/EV = 1.11. Anterior ocellus distinctly far away from eyes; POL/AOL = 1.57; OOL/WOT = 1.30; DAO = 0.038 mm. Vertex crest straight; sides of head behind eyes almost parallel. Occipital carina absent. Malar space absent. Gena coriaceous; ventral area of gena elevated in lateral view. Mesosoma (Fig. 3F-H ). DT/LT = 0.39. Pronotum coriaceous; dorsal pronotal area slightly convex, shorter than wide, with punctures; pronotum sloping in lateral view. Mesoscutum coriaceous with punctures; parapsidal signum weak; mesoscutellum coriaceous with punctures, mesoscutellar fovea present. Metanotum coriaceous, 0.17 × mesoscutellum. Metapectal-propodeal complex coriaceous; metapectal-propodeal disc 0.77 × wide; prespiracular propodeal depression oblong; metapostnotum with median shiny longitudinal stripe elevated; lateral marginal carina complete; anterior metapleural area smooth; metapleural line with three pits. Propleuron coriaceous. Mesopectus coriaceous; subalar impression present; mesopleural pits present; ventral surface of mesopectus with fovea near mesocoxa; mesodiscrimen present as trace. Forewing (Fig. 3I ). Rs2v 0.57 × Rs&M2v; R12v intersect apical portion of Rs2v at acute angle; length of pterostigma 0.45 × its width. Metasoma. Smooth. Metasomal sternum I with longitudinal carina; metasomal sternum III with ‘V’ shaped depression medially.

Male. Unknown.

Etymology.

The specific name " Sierola limatulifascia " is a combination of " limatulus " (=smoothed, polished) and " fascia " (= band, stripe) referring to the median shiny longitudinal stripe in the metapostnotum.

Host.

Larvae of Haplochrois theae (Kusnezov, 1916).

Distribution.

China (Zhejiang).

Comments.

This species can be distinguished from other species by having R12v intersect apical portion of Rs2v at acute angle, and metapostnotum with median shiny longitudinal stripe elevated.

Figures

Figure 3. Sierola limatulifascia sp. nov., holotype, female A habitus lateral B head, frontal view C mandible D antenna E head, lateral view F pronotum, dorsal view G mesosoma (except prothorax), dorsal view H mesosoma, lateral view I forewing. Scale bars: 0.15 mm (A, B, E-I); 0.05 mm (C, D).