Trichacis concavata 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 : 14

Trichacis concavata Arias-Penna & Masner , new species

Figures 5 D–5G

Female. Body length: 1.40 mm (holotype).

Black shining; A1–A6 yellow; A7–A10 brown; mandible black with apex brown; fore and mid legs yellow and hind leg brown; coxae dark brown; fore wing infuscate.

Head, in dorsal view, 2.2 times wider than long; EH <IOS; interocellar area finely coriaceous; OOL = LOL; antennal clava 3-segmented; A1 not reaching vertex dorsal margin; A2–A4, A8, A10 longer than wide; A5–A6 as long as wide; A7–A9 wider than long; base of mandible smooth; frons above torulus and interantennal process with three marked transverse striae; interantennal process smooth and surpassing ventral border of torulus; clypeus hidden by interantennal process; clypeal margin truncate; gena striate; vertex laterally coriaceous and medially smooth; temple projection absent; hyperoccipital carina incomplete: in dorsal view, hyperoccipital carina surpassing level of imaginary line connecting eye inner margin to posterior cephalic margin; distance between posterior ocellus and hyperoccipital carina shorter than posterior ocellus diameter.

Mesosoma arched; antero-admedian line present; notaulus anteriorly incomplete and weakly marked; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area with coriaceous sculpture in 1/ 3 anterior, and with posterior 2/3 smooth; posteromedial region of inter-notaular area broadly concave; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped; median projection of specialized area of mesoscutellum subtriangular; mesopleural carina incomplete (length of mesopleural carina/ length of mesopleuron = 0.72); fore wing distinctly surpassing apex of metasoma.

Metasoma moderately elongate; combined length of T3–T6 <T2; T1 longer than wide; T2 slightly shorter than wide; T3–T5 wider than long; anteromedial area of T2 smooth and slightly concave; T3 densely covered by shallow punctuation; T4–T6 densely covered by deep punctuation; T6 subtriangular.

Male. Unknown.

Etymology. The name of the species refers to the concavity of the posteromedial region of the inter-notaular area.

Diagnosis. Trichacis concavata is the single species with posteromedial region of inter-notaular area concave, and with OOL = LOL.

Material examined. Holotype: 1 Ƥ, COSTA RICA, Alajuela, Reserva Rincón Forestal, Estación Caribe, 10º53´N 85º18´W, 400 m, February 19–20 2003, SS, J.S. Noyes ( CNCI).

Holotype is deposited in CNCI.

Figures

FIGURE 5. Bright field images of Trichacis species. A – C: Trichacis colombiana Arias-Penna & Masner, n. sp., Ƥ (holotype). A, habitus, dorsal view; B, habitus, lateral view; C, head and anterior mesosoma, anterodorsal view. D – G: Trichacis concavata Arias- Penna & Masner, n. sp., Ƥ (holotype). D, head and ventral mesosoma, anterior view; E, habitus, dorsal view; F, habitus, lateral view; G, head and mesosoma, dorsal view. H: Trichacis corrugata Arias-Penna & Masner, n. sp., Ƥ (holotype), head, anterior view.