Trichacis panamana 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: 30

publication ID 10.5281/zenodo.281325

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scientific name

Trichacis panamana Arias-Penna & Masner

new species

Trichacis panamana Arias-Penna & Masner  , new species

Figures 14View FIGURE 14 A – 14 E; 21 D

Female. Body length: 1.80 mm (holotype).

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

Head, in dorsal view, 2.1 times as wide as long; EH < IOS; interocellar area finely coriaceous making weakly transverse striae; OOL <LOL; antenna clava 3 -segmented; A 1 not reaching vertex dorsal margin; A 2 –A 4, A 10 longer than wide; A 5 –A 6, A 8 as long as wide; A 7 –A 9 wider than long; base of mandible smooth; frons above torulus with four transverse striae and coriaceous sculpture; interantennal process with reticulate striae, surpassing ventral border of torulus; clypeus exposed; clypeal margin truncate; gena smooth; anterior region of vertex with faint, transverse, slightly curved striae; lateral region of vertex between posterior ocellus and hyperoccipital carina coriaceous, with 3–4 transverse striae reaching external margin of posterior ocellus; lateral region of vertex between hyperoccipital carina and occipital carina coriaceous but without striae; temple projection absent; hyperoccipital carina almost complete: 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 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; inter-notaular area coriaceous in its basal 1 / 3 and smooth in its posterior 2 / 3; posteromedial region of inter-notaular area convex; 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 = 0.26); fore wing slightly 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; T 3 –T 6 wider than long; anteromedial area of T 2 smooth and flattened; T 3 densely covered by shallow punctuation; T 4 –T 6 densely covered by deep punctuation; T 6 subtriangular.

Male. Body length: 1.90 mm (allotype); 1.80 mm (paratype); mean length ± SD = 1.85 ± 0.07 mm.

Similar to female except the following: hind leg yellow except tibial apex and tarsi dark brown; antenna filiform; A 1 –A 3 yellow; A 4 –A 10 brown; A 3 as long as wide; A 5 –A 9 longer than wide; T 1 shorter than wide; T 3 smooth along its posterior margin and T 4 –T 6 covered by deeply and dense punctuation.

Etymology. Named after the country of the type locality.

Diagnosis. Both Trichacis panamana  and T. mexicana  have: T 1 shorter than wide; clypeus exposed, and clypeal margin truncate. However, T. panamana  has EH < IOS, OOL <LOL and distance between posterior ocellus and hyperoccipital carina longer than posterior ocellus diameter.

Material examined. Holotype: 1 Ƥ, PANAMA, Veraguas, 8 km W Santa Fe, Forest, 8 º 30 ´ 26 ´´N 81 º06´ 49 ´´W, 870 m, January 1–4 2001, YPT, L. Masner ( CNCI); allotype: 1 3, with the same data as holotype ( CNCI); paratype: 1 3, with the same data as holotype ( ICN).

Holotype is deposited in CNCI.


Institute of Oceanographic Sciences


Canadian National Collection Insects


Instituto de Ciencias Naturales, Museo de Historia Natural