Trichacis sculpturata 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: 37

publication ID 10.5281/zenodo.281325

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scientific name

Trichacis sculpturata Arias-Penna & Masner

new species

Trichacis sculpturata Arias-Penna & Masner  , new species

Figures 17View FIGURE 17 F – 17 H; 18 A

Female. Body length: 2.25 mm (holotype).

Black; A 1 –A 2 yellow; A 3 –A 10 brown; base of mandible black, apex brown and rest yellow; fore and mid legs yellow; hind leg yellow but with tibial apex and tarsi brown; hind coxa brown; fore wing infuscate.

Head, in dorsal view, 1.8 times as wide as long; EH < IOS; interocellar area finely coriaceous; OOL > LOL; antennal clava 4 -segmented; A 1 not reaching vertex dorsal margin; A 2 –A 7, A 10 longer than wide; A 8 –A 9 as long as wide; base of mandible striate; frons above torulus and interantennal process coriaceous with three marked transverse striae; interantennal process smooth and reaching, but not surpassing, ventral border of torulus; clypeus exposed; clypeal margin convex medially; gena striate; vertex laterally coriaceous; medial vertex area smooth between posterior ocellus and hyperoccipital carina and coriaceous between hyperoccipital carina and occipital carina; temple projection absent; hyperoccipital carina incomplete: in dorsal view, hyperoccipital carina fading before reaching level of imaginary line connecting eye inner margin to posterior cephalic margin; distance between posterior ocellus and hyperoccipital carina longer than posterior ocellus diameter.

Mesosoma arched; antero-admedian line present; notaulus percurrent; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area coriaceous; posteromedial region of inter-notaular area convex; parapsidal line present; central pronotal area with anterior margin and rest coriaceous; specialized area of mesoscutellum heart-shaped; median projection of specialized area of mesoscutellum triangular; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.48); fore wing distinctly surpassing apex of metasoma.

Metasoma elongate; combined length of T 3 –T 6 <T 2; T 1 shorter than wide; T 2 longer than wide; anteromedial area of T 2 concave and covered with irregular striae, T 3 densely covered by shallow punctuation, T 4 –T 6 densely covered by deep punctuation; T 6 subtriangular.

Male. Unknown.

Etymology. The name of the species refers to the coriaceous sculpture of the inter-notaular area.

Diagnosis. Trichacis sculpturata  and T. corrugata  have inter-notaular area coriaceous. T. sculpturata  differs by the sculpture of its vertex and by the shape of its specialized area of the mesoscutellum.

Material examined. Holotype: 1 Ƥ, MEXICO, Chis. 7200 ft, S. Crist., Las Casas, July 1–12 1969, MT ( CNCI).

Holotype is deposited in CNCI.


Institute of Oceanographic Sciences


Canadian National Collection Insects