Trichacis costaricana Arias-Penna & Masner

Arias-Penna, Tania Milena, Masner, Lubomir & Delsinne, Thibaut, 2012, Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species, Zootaxa 3337, pp. 1-56 : 15-17

Trichacis costaricana Arias-Penna & Masner , new species

Figures 6 E–6G

Female. Body length: 2.60 mm (holotype).

Black; A1–A5 yellow; A6–A10 brown; mandible brown with base and apex dark brown; fore and mid legs yellow; hind leg tarsi, apex of femur and apex of tibia brown, otherwise yellow; fore and mid coxae brown; hind coxa dark brown; fore wing infuscate.

Head, in dorsal view, 2.2 times as wide as long; EH <IOS; interocellar area with fine coriaceous sculpture; OOL <LOL; antennal clava 4-segmented; A1 not reaching vertex dorsal margin; A2–A4, A7, A10 longer than wide; A5 as long as wide; A6, A8–A9 wider than long; base of mandible smooth; frons above torulus, with transverse striae and coriaceous; clypeus exposed; clypeal margin convex medially; interantennal process striate, curving down, and surpassing anterior ventral of torulus; gena smooth; lateral region of vertex coriaceous, and with longitudinal striae between hyperoccipital carina and occipital carina; temple projection absent; hyperoccipital carina complete; distance between posterior ocellus and hyperoccipital carina longer than posterior ocellus diameter.

Mesosoma slightly arched; antero-admedian line present; notaulus anteriorly incomplete; lateral notaular area with coriaceous sculpture along its anterior margin; basal 1/3 of inter-notaular area coriaceous, rest smooth; posteromedial region of inter-notaular area convex; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum circular and elevated; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.55); fore wing slightly surpassing apex of metasoma.

Metasoma elongate; combined length of T3–T6 <T2; T1 shorter than wide; T2 longer than wide; T3 wider than long; anteromedial area of T2 smooth and concave; T3–T6 wider than long; T3 with some parts smooth and densely covered by shallow punctuation; T4–T6 densely covered by deep punctuation; T6 subtriangular.

Male. Unknown.

Etymology. Named after the country of the type locality.

Diagnosis. Trichacis costaricana , like T. kaulbarsi , has its specialized area of mesoscutellum circular and elevated, but can be distinguished by the following characters: notaulus present; OOL <LOL and distance between posterior ocellus and hyperoccipital carina longer than posterior ocellus diameter. Material examined. Holotype: 1 Ƥ, COSTA RICA, Guanacaste, N. P. Biol. Sta. Cacao, 1200 m, February 13 1995, L. Masner (CNCI).

Holotype is deposited in CNCI.

Figures

FIGURE 6. Bright field images of Trichacis species. A – D: Trichacis corrugata Arias-Penna & Masner, n. sp. Ƥ (holotype). A, habitus, dorsal view; B, habitus, lateral view; C, head and anterior mesosoma, dorsal view; D, head and mesosoma, dorsolateral view. E – G: Trichacis costaricana Arias-Penna & Masner, n. sp., Ƥ (holotype). E, head and anteroventral mesosoma, anterior view; F, habitus, dorsal view; G, habitus, lateral view. H: Trichacis delsinnei Arias-Penna & Masner, n. sp., Ƥ (holotype), head, anterior view.