Heterocoelia remota, 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 : 14-15

Heterocoelia remota sp. nov.

urn:lsid:zoobank.org:act:0D4365A9-6ED5-4203-9104-A5702C7171AF

Fig. 5

Diagnosis

This new species can be recognized by having the antenna thickened, the median pronotal sulcus foveolate, the anterior margin of PPP rounded in lateral view and the hind wing with three dorsal hamuli. This species is similar to H. varicolor sp. nov. by having the legs partly dark brown. However, it can be distinguished from it because it has the following characteristics: distance between 1 st and 2 nd hamuli 2.0× distance between 2 nd and 3 rd hamuli (1.5× in H. varicolor sp. nov.); apical margin of PPP rounded in lateral view (truncate in H. varicolor sp. nov.).

Etymology

The specific epithet ‘ remota ’is Latin for ‘removed’, referring to the distance between the 1 st and 2 nd distal hamuli being distinctly longer than the distance between the 2 nd and 3 rd distal hamuli of the hind wing.

Material examined

Holotype

CHINA – Yunnan • ♀; Naban River Watershed National Nature Reserve , Naban Tea Factory ; [22.15843˚ N, 100.66487˚ E]; alt. 732 m; Flight Interception Trap; 16 May 2009; Lingzeng Meng leg.; IZCAS IOZ(E) 2059129.

Description

Female

MEASUREMENTS. Body length 6.09 mm. Fore wing length 2.67 mm.

COLOURATION. Black. Mandible yellowish brown. Antenna dark brown, yellowish brown ventrally; scape, pedicel and flagellomere I reddish brown. Fore wing hyaline, brown with longitudinal light yellowish-brown band near pterostigma; veins yellowish brown to brown, pterostigma yellowish brown. Legs dark brown, trochanters, femora apically, tibiae and tarsi reddish brown. T5 brown, T6–7 yellowish brown.

PUBESCENCE. Body with short, dense light yellowish-brown setae. Antenna with dense appressed setae, sparser on scape. 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 1.07 × WH. Mandible with four apical teeth, ventralmost one longest. Clypeus trilobite, medio-clypeal lobe with anterior margin acute medially ( Fig. 5B ); medio-clypeal carina present, not extending into frons, arched in lateral view.Antenna slightly thickened. Frons coriaceous and densely foveolate; frontal line weak ( Fig. 5B ); WF 1.36 × LE. Contour of eye protruding in antero-dorsal view; LE 0.39 × LH; LE 1.74 × DEV. Anterior ocellus crossing imaginary top line of eyes in antero-dorsal view; POL 1.211 × AOL, OOL 1.09 × WOT, DPV 1.74 × DAO. Vertex coriaceous and densely foveolate; sides of head behind eyes converging posteriorly, vertex crest protruding. Occipital carina complete, occiput coriaceous. Gena coriaceous and densely foveolate, shallower foveolate ventrally; medioccipito-genal suture and hypostomal sulcus present.

MESOSOMA. Dorsal pronotal area coriaceous, densely foveolate; median length 0.43 × width along posterior margin; anterolateral corner rounded; median pronotal sulcus foveolate ( Fig. 5C ); lateral pronotal area obliquely striate; cervical pronotal area coarse. Mesoscutum distinctly elevated on apical two-thirds, coriaceous with dense punctures; notauli complete and converging posteriorly; parapsidal signum shallow, absent near anterior margin. Mesoscutellum coriaceous and foveolate with punctures intermediately; mesoscutum-mesoscutellar sulcus present, laterally dilated; medio-longitudinal sulcus absent ( Fig. 5D ). Dorsal surface of MPC elevated; median length of dorsal surface of MPC 0.81× its half-width; metapostnotum strongly areolate, metapostnotal median carina complete ( Fig. 5D ); 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. 5D ); PPP long, 0.48 × median length of dorsal surface of MPC, apex rounded 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. Propleuron coriaceous, foveolate near procoxa. Mesopleuron coriaceous, densely foveolate; subalar impression present; posterior oblique sulcus of mesopleuron present and foveolate; anterior mesofurcal pit present.

WINGS. Fore wing with 2r-rs&Rs 2 v slightly curved apically; posterior margin of pterostigma straight, prestigma absent ( Fig. 5F ); Cu 2 v nebulous. Hind wing with three distal hamuli, distance between 1 st and 2 nd distal hamuli 2.0× distance between 2 nd and 3 rd distal hamuli.

METASOMA. Metasomal terga shiny with punctures; T1 with sparse punctures, medio-longitudinal sulcus present on basal one-fourth; T2 with dense punctures, coriaceous basally ( Fig. 5E ); T3–4 basal half coriaceous. Metasomal sterna shiny, with variably sized punctures.

Male

Unknown.

Distribution

China (Yunnan) ( Fig. 20 ).

Figures

Fig. 5. Heterocoelia remota sp. nov., holotype, ♀ (IZCAS IOZ(E) 2059129). A. Habitus, lateral view. B. Head, antero-dorsal view. C. Pronotum, dorsal view. D. MPC, dorsal view. E. T2, dorsal view. F. Fore wing. Scale bars: A, C–F = 0.20 mm; B = 0.25 mm.

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