Calobrachium trilinum Gobbi & Azevedo, 2016

Gobbi, Fernanda T. & Azevedo, Celso O., 2016, Revision of Calobrachium Gobbi & Azevedo, gen. nov. (Hymenoptera, Bethylidae), with description of seven new Oriental species, Zootaxa 4083 (2), pp. 221-238 : 234-235

Calobrachium trilinum Gobbi & Azevedo , sp. nov.

( Figs 8 , 16 , 29 , 44, 45 )

Description. MALE. Body length 2.5 mm. LFW 1.6 mm. Color. Head black; mesosoma dark castaneous; mandible, clypeus, antenna and metasoma castaneous; legs light castaneous; wings hyaline.

Head ( Fig. 8 ). Mandible with teeth small and almost equally sized. Apical margin of median clypeal lobe straight. Flagellomeres median-sized; four first antennomeres in ratio about 15:4:8:6; pedicel 1.3 × as long as wide; F1 very long, 2.0 × as long as wide; F9 1.5 × as long as wide; flagellar setae suberect and erect. Frontal carina slightly conspicuous. WH 0.9 × LH. WF 0.7 × WH. WF 1.4 × HE. Eye small, salient. Ocellus small. DAO 0.2 × WF. Frontal angle of ocellar triangle acute. WOT 2.7 × DAO. OOL 1.1 × WOT. Distance of posterior ocellus to vertex crest 1.0 × DAO. VOL 1.0 × HE. Temple strongly divergent. Vertex straight.

Mesosoma ( Fig. 16 ). Pronotal disc and mesonotum densely punctate. Pronotal collar short. Pronotal declivity low. Pronotal disc 0.5 × as long as wide; anterior region 0.4 × as long as wide; rounded. Notauli absent. Scutellar furrow wide, shallow, slightly scrobiculate; corner straight. Median region of scutellum coriaceous, punctate. Median region of metanotum long, wide; inner foveae of metanotal furrow delimited. Propodeal disc 1.2 × as long as wide; 0.5 × as high as long; anteriorly slightly rugulose, posteriorly coriaceous; lateral carina conspicuous; propodeal declivity coriaceous, medially polished; side of propodeum slightly imbricate. Mesopleuron coriaceous; transversal furrow conspicuous, slightly scrobiculate. Discoidal vein slightly pigmented.

Metasoma. Petiole short, 0.2 × as long as propodeal disc. Hypopygium ( Fig. 29 ) 0.9 × as long as wide; posterior margin slightly trilobate; median lobe angulate, slender; posterior projection short; lateral lobe convex; lateral margin convex; anterior pigmented line strongly pigmented, slender; lateral stalk absent. Genitalia ( Figs 43– 44 ): aedeagus slightly mesoconvex; projection of apical region ventrad absent; dorsal paramere about as long as ventral paramere, almost as wide as ventral paramere, inner margin sinuous, outer margin sinuous; membranous region of basiparamere forming two frontal large lobes; sclerite on volsella base absent.

FEMALE unknown.

Material examined. Holotype, ♂. THAILAND, Chaiyaphum, Tat Tone NP, Forest fire Protection station , 16°0.793’N 102°1.257’E, 195 m, MT, 9–15.VI.2006, Tawit Jaruphan & Orawan Budsawong leg., T2536 ( QSBG).

Distribution. Thailand (Chaiyaphum).

Remarks. See remarks of C. lepidum comb. nov. C. trilinum sp. nov. has the median flagellomeres shorter than all another species.

Figures

FIGURES 1 – 9. Head in dorsal view. 1. Calobrachium lepidum comb. nov.. 2. C. luangum sp. nov. 3. C. miticum sp. nov. 4 – 5. C. pongum sp. nov. 6. C. salum sp. nov. 7. C. thanum sp. nov. 8. C. trilinum sp. nov. 9. C. vancum sp. nov. Scale bar = 300 µm.

FIGURES 10 – 18. Mesosoma in dorsal view. 10. Calobrachium lepidum comb. nov.. 11. C. luangum sp. nov. 12. C. miticum sp. nov. 13. C. pongum sp. nov. 14. C. salum sp. nov. 15. C. thanum sp. nov. 16. C. trilinum sp. nov. 17. C. vancum sp. nov. 18. Mesosoma in ventral view. C. miticum sp. nov. Scale bar = 300 µm.

FIGURES 23 – 30. Hypopygium in dorsal view. 23. Calobrachium lepidum comb. nov.. 24. C. luangum sp. nov. 25. C. miticum sp. nov. 26. C. pongum sp. nov. 27. C. salum sp. nov. 28. C. thanum sp. nov. 29. C. trilinum sp. nov. 30. C. vancum sp. nov. Scale bar = 250 µm.

FIGURES 39 – 47. Male genitalia. 39. Calobrachium pongum sp. nov. Ventral view. 40 – 41. C. salum sp. nov. 40. Dorsal view. 41. Ventral view. 42 – 43. C. thanum sp. nov. 42. Dorsal view. 43. Ventral view. 44 – 45. C. trilinum sp. nov. 44. Dorsal view. 45. Ventral view. 46 – 47. C. vancum sp. nov. 46. Dorsal view. 47. Ventral view. Scale bar = 250 µm.