Heterocoelia varicolor, 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 : 19-20

Heterocoelia varicolor sp. nov.

urn:lsid:zoobank.org:act:F083F8DC-6699-46AE-801B-FAFF42634300

Fig. 7

Diagnosis

This new species can be recognized by having the median pronotal sulcus foveolate, the anterior margin of the PPP truncate in lateral view and the hind wing with three distal hamuli. This species is similar to H. remota sp. nov. for having the legs partly dark brown. It can be distinguished from the latter by having the hind wing with the distance between the 1 st and 2 nd distal hamuli 1.5 × the distance between 2 nd and 3 rd distal hamuli (2.0 in H. remota ) and the apex of the PPP is truncate in lateral view (rounded in H. remota ).

Etymology

The specific epithet is a combination of ‘ varius ’ (Latin for ‘different’) and ‘ color ’ (Latin for ‘tint’), and refers to the variably coloured legs of this species.

Material examined

Holotype

CHINA – Yunnan • ♀; Naban River Watershed National Nature Reserve , Mengsong Town, Benggangxinzhai Plantation ; [22.18418˚ N, 100.64986˚ E]; alt. 797 m; 12 May 2008; Trap; Lingzeng Meng leg.; IZCAS IOZ(E) 2059142.

Description

Female

MEASUREMENTS. Body length 6.19 mm. Fore wing length 3.04 mm.

COLOURATION. Black. Mandible reddish brown. Antenna dark brown, yellowish brown ventrally; scape, pedicel and flagellomere I reddish brown. Fore wing hyaline, brown with longitudinal light yellowish band medially; veins yellowish brown or brown, pterostigma yellowish brown. Legs dark brown, trochanters, femora apically, tibiae and tarsi reddish brown. T4 brown with posterior margin yellowish brown; T5–7 yellowish brown.

PUBESCENCE. Body with short dense light yellowish-brown setae. Antenna with dense appressed setae, sparser on scape ( Fig. 7C ). Eye with sparse erect setae, 3.0× diameter of an ommatidium. Wings with short dense brown setae. Setae of metasoma longer than setae of head and mesosoma; T1 with setae laterally, T2 with basal glabrous triangular area dorsally.

HEAD. Longer than wide, LH 1.06 × WH. Clypeus trilobite; medio-clypeal lobe with anterior margin slightly acute medially; medio-clypeal carina present, not extending into frons, arched in lateral view. Antenna thickened. Frons coriaceous and densely foveolate ( Fig. 7B ); WF 1.36× LE. Contour of eye slightly protruding in antero-dorsal view; LE 0.40× LH; LE 1.56 × DEV. Anterior ocellus crossing imaginary top line of eyes in antero-dorsal view; POL 0.96 × AOL, OOL 0.97 × WOT, DPV 2.21 × DAO. Vertex coriaceous and densely foveolate; sides of head behind eyes nearly straight, converging posteriorly; vertex crest protruding. Gena coriaceous and densely foveolate. Occipital carina complete.

MESOSOMA. Dorsal pronotal area coriaceous, densely foveolate; median length 0.44 × width along posterior pronotal margin ( Fig. 7D ); anterolateral corner rounded; median pronotal sulcus incomplete; lateral pronotal area obliquely striate; cervical pronotal area coarse. Mesoscutum distinctly elevated on apical two-thirds, coriaceous with dense punctures ( Fig. 7E ); median mesonotal sulcus absent, impressed in middle of apical half ( Fig. 7E ); notauli complete and converging posteriorly; parapsidal signum shallow, absent near anterior margin. Mesoscutellum coriaceous, foveolate with puncture intermediately; mesoscutum-mesoscutellar sulcus present, laterally dilated ( Fig. 7E ); medio-longitudinal sulcus absent. Dorsal surface of MPC elevated; median length of dorsal surface of MPC 0.89 × its half-width; metapostnotum strongly areolate, metapostnotal median carina complete ( Fig. 7F ); metapostnotal-propodeal carina complete, distinctly oblique anteriorly and converging posteriorly; dorsal propodeal area transversely striate; paraspiracular and lateral marginal carinae of MPC complete, lateral marginal carina nearly straight ( Fig. 7G ); PPP long, 0.47 × median length of dorsal surface of MPC, apex truncate in lateral view; transverse posterior carina of MPC complete; propodeal declivity areolate, median and lateral carinae complete; anterior metapleural area transversely striate; lateral surface of MPC transversely striate, areolate near submarginal carina of MPC. Mesopleuron coriaceous, densely foveolate; subalar impression present; posterior oblique sulcus of mesopleuron present and foveolate.

WINGS. Fore wing with 2r-rs&Rs 2 v slightly curved apically; posterior margin of pterostigma straight, prestigma absent ( Fig. 7H ); Cu 2 v nebulous. Hind wing with three distal hamuli, distance between 1 st and 2 nd distal hamuli 1.50 × distance between 2 nd and 3 rd distal hamuli.

METASOMA. Metasomal terga shiny with punctures; T1 with sparse punctures, medio-longitudinal sulcus present at basal one-fourth; T2 with dense punctures, coriaceous basally ( Fig. 7G ); T3–4 basal half coriaceous. Metasomal sterna shiny with variably sized punctures; S1 irregularly striate.

Male

Unknown.

Distribution

China (Yunnan) ( Fig. 20 ).

Figures

Fig. 7. Heterocoelia varicolor sp. nov., holotype, ♀ (IZCAS IOZ(E) 2059142). A. Habitus, lateral view. B. Head, antero-dorsal view. C. Antenna. D. Pronotum, dorsal view. E. Mesonotum, dorsal view. F. MPC, dorsal view. G. T2, dorsal view. H. Fore wing. Scale bars: A, C–H = 0.20 mm; B = 0.25 mm.

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