Zimankos acutulus, Wang & He & Chen, 2024

Wang, Chunhong, He, Junhua & Chen, Xuexin, 2024, Revision of subfamily Mesitiinae (Hymenoptera, Bethylidae) from China, European Journal of Taxonomy 960 (1), pp. 1-61 : 48-50

Zimankos acutulus sp. nov.

urn:lsid:zoobank.org:act:686744DD-BF0C-4087-91C9-380D8B877806

Fig. 16

Diagnosis

This new species is similar to Z. cambodianus ( Móczár, 1976) in having the anterolateral corner of the dorsal pronotal area distinctly projected and the PPP shorter than half-length of the dorsal surface of MPC. However, it can be distinguished by having the length of PPP nearly equal to the width at its base and the apical margin of PPP acute in lateral view (rounded in Z. cambodianus ); the pterostigma with the posterior margin straight (protruding in Z. cambodianus ); the posterior branches of the hypopygium 0.36 × the length of the hypopygium (0.48 × the length of the hypopygium in Z. cambodianus ).

Etymology

The specific epithet refers to the short and acute PPP in lateral view; ‘ acutus ’ is Latin for ‘sharp’.

Material examined

Holotype

CHINA – Sichuan • ♂; Panzhihua, Ertan ; 30 Jul. 2006; Zhilei Gao leg.; ZJUH 200611246 .

Description

Male

MEASUREMENTS. Body length 6.21 mm. Length of forewing 3.57 mm.

COLOURATION. Black. Mandible brown. Antenna brown, darker apically. Fore wing hyaline, light brown; veins yellowish brown or brown, pterostigma yellowish brown. Legs dark brown, trochanters, femora apically, tibiae and tarsi brown. T1 posteriorly, T2 apical half and T4–5 yellowish brown.

PUBESCENCE. Body with short setae. Maxillary and labial palpi with dense, short setae. Antenna with short, suberect setae, 0.16× width of flagellomere II ( Fig. 16C ). Eye with sparse, short setae, nearly 6.0× diameter of an ommatidium. Wings with short, dense brown setae. Setae of metasoma longer than setae of head and mesosoma, T1 nearly glabrous, T2 with basal triangular area glabrous.

HEAD. Shorter than wide, LH 0.94 × WH. Clypeus trilobite, anterior margin of medio-clypeal lobe acute medially; medio-clypeal carina not extending into frons, arched in lateral view. Antenna slender. Frons coriaceous and densely foveolate, median frontal line absent ( Fig. 16B ); WF 1.59 × LE. Contour of eye protruding in antero-dorsal view ( Fig. 16B ); LE 0.41 × LH, LE 1.27 × DEV. Anterior ocellus partly anterior to imaginary top line of eyes; POL 1.58× AOL, OOL 0.98 × WOT, DPV 2.32 × DAO. Vertex coriaceous and densely foveolate, sides of head behind eyes nearly parallel, vertex crest protruding. Gena coriaceous, densely foveolate, with shallow foveolae ventrally. Occipital carina complete.

MESOSOMA. Dorsal pronotal area coriaceous and foveolate, median length 0.49 × width along posterior pronotal margin, anterolateral corner distinctly projected; median pronotal sulcus present ( Fig. 16D ); lateral pronotal area obliquely striate; cervical pronotal area coarse. Mesoscutum elevated, coriaceous with dense punctures; median mesonotal sulcus present on apical one-third, foveolate ( Fig. 16E ); notauli complete and converging posteriorly, parapsidal signum shallow, absent near anterior margin. Mesoscutellum coriaceous and foveolate; mesoscutum-mesoscutellar sulcus arched, laterally dilated ( Fig. 16E ). Median length of dorsal surface of MPC equal to its half-width; metapostnotum strongly areolate, metapostnotal median carina complete, metapostnotal-propodeal carina complete and converging posteriorly ( Fig. 16E ); dorsal propodeal area transversely striate; paraspiracular and lateral marginal carinae of MPC complete; length of PPP 0.32× median length of dorsal surface of MPC ( Fig. 16E ); transverse posterior carina of MPC complete; propodeal declivity weakly transversely striate, areolate near posterior marginal carina, median and lateral carinae complete; anterior metapleural weakly striate; lateral surface of MPC areolate, submarginal and posterior carinae present. Mesopleuron coriaceous and densely foveolate; subalar impression weak; posterior oblique sulcus of mesopleuron present and foveolate; postepicnemial sulcus present; ventral surface of mesopleuron coriaceous and shallowly foveolate; anterior mesofurcal pit present and deep.

WINGS. Fore wing with 2r-rs&Rs 2 v slightly curved apically, 1.12 × as long as Sc+R 2 v; posterior margin of pterostigma protruding, prestigma absent ( Fig. 16G ); Cu 2 v present as light yellowish-brown trace. Hind wing with four distal hamuli.

METASOMA. Metasomal terga shiny, with punctures; T1 with shiny, sparse punctures, medio-longitudinal sulcus present at basal one-third; T2 with dense punctures. Metasomal sterna shiny, with variably sized punctures; S1 irregularly striate, metapostnotal median carina weak; S2 with dense, variably sized punctures. Length of hypopygium 2.18 × its width; lateral and anterior margin of basal part of hypopygium distinctly incurved ( Fig. 16H ); posterior branches 0.36 × length of hypopygium, distinctly narrower than median notch; apical margin of posterior branches and bottom of posterior median notch with long setae.

MALE GENITALIA. Harpe bilobate, dorsal harpe filamentary ( Fig. 16I ), ventral harpe finger-like, with long setae ( Fig. 16J ). Cuspis with apical margin incurved; digitus bent and papillate apically, with setae basally; aedeagus bottle-shaped ( Fig. 16I ).

Female

Unknown.

Distribution

China (Sichuan) ( Fig. 20 ).

Figures

Fig. 16. Zimankos acutulus sp. nov., holotype, ♂ (ZJUH 200611246). A. Habitus, lateral view. B. Head, antero-dorsal view. C. Antenna. D. Pronotum, dorsal view. E. Mesonotum and MPC, dorsal view. F. T2, dorsal view. G. Fore wing. H. Hypopygium. I. Genitalia, dorsal view. J. Genitalia, ventral view. Scale bars: 0.20 mm.

Fig. 20. Distribution map of species of Mestiinae from China.