Trichacis fernandezi 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: 21

publication ID 10.5281/zenodo.281325

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scientific name

Trichacis fernandezi Arias-Penna & Masner

new species

Trichacis fernandezi Arias-Penna & Masner  , new species

Figures 9View FIGURE 9 B – 9 F; 21 E

Female. Body length: 1.60 mm (holotype).

Black; A 1 –A 5 yellow; A 6 –A 10 brown; mandible yellow with base and apex brown; fore and mid legs yellow; hind leg with tarsi and apical ½ of femur and tibia brown, otherwise yellow; fore wing infuscate.

Head, in dorsal view, two 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 3, A 10 longer than wide; A 4, A 6 as long as wide; A 5, A 7 –A 9 wider than long; base of mandible striate; frons above torulus with three transverse striae and coriaceous sculpture; interantennal process with reticulate striae, surpassing ventral border of torulus; clypeus hidden by interantennal process; clypeal margin truncate; gena striate; lateral region of vertex, between external margin of posterior ocellus and eye inner margin, coriaceous, with 2–4 curved transverse striae; lateral region of vertex between hyperoccipital carina and occipital carina markedly coriaceous and longitudinally striate; temple projection absent; hyperoccipital carina incomplete but curving up and merging with stria running along the eye inner 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 with anterior 1 / 3 coriaceous and smooth in its posterior 2 / 3; posteromedial region of inter-notaular area narrow and convex; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped; median projection of specialized area of mesoscutellum subrectangular; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.45); 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 wider than long; anteromedial area of T 2 slightly concave and longitudinally striate; T 3 smooth along its anterior margin and rest with shallow punctuation; T 4 –T 6 densely covered by deep punctuation; T 6 subtriangular.

Male. Unknown.

Etymology. The species is named in honor of the entomologist Fernando Fernández.

Diagnosis. T. fernandezi  and T. pecki  have an incomplete hyperoccipital carina of similar shape. Trichacis fernandezi  has OOL <LOL, a slightly concave and longitudinally striate anteromedial area of T 2, and an internotaular area that is narrow and convex posteriorly.

Material examined. Holotype: 1 Ƥ, ECUADOR, Sucumbios, Sacha Lodge, 0º 30 ´S 76 º 30 ´W, July 3–13 1994, MT, Peter Hibbs ( CNCI).

Holotype is deposited in CNCI.


Institute of Oceanographic Sciences


Canadian National Collection Insects