Trichacis depressa 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 : 17-19

publication ID

https://doi.org/ 10.5281/zenodo.281325

DOI

https://doi.org/10.5281/zenodo.6166430

persistent identifier

https://treatment.plazi.org/id/038EFC5F-7C51-D457-FF7B-F94FBB59FCFB

treatment provided by

Plazi

scientific name

Trichacis depressa Arias-Penna & Masner
status

sp. nov.

Trichacis depressa Arias-Penna & Masner , new species

Figures 7 View FIGURE 7 E, 7F; 8A, 8B

Female. Body length: 2.40 mm (holotype); 1.90–2.70 mm (paratypes, n=4); mean length ± SD = 2.22 ± 0.33 mm. Black; A1–A10 dark brown; mandible yellow with apex brown; fore leg yellow; mid leg with trochanter, femur and base of tibia yellow, otherwise brown; hind leg dark brown; mid coxa yellow; hind coxa brown; fore wing infuscate.

Head, in dorsal view, 2.1 times wider than long; EH> IOS; interocellar area with fine coriaceous sculpture; OOL> LOL; antennal clava 3-segmented; A1 distinctly surpassing vertex dorsal margin; A2–A10 longer than wide; base of mandible smooth; frons between external margin of torulus and inner margin of eye medially covered by delicate coriaceous sculpture; interantennal process truncate, smooth and reaching, but not surpassing, ventral border of torulus; clypeus exposed; clypeal margin truncate; gena smooth; vertex laterally coriaceous and medially smooth; 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 shorter 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 broadly convex; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped, moderately elevated, with a rather broad tuft of hairs; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.12); fore wing not surpassing apex of metasoma.

Metasoma distinctly elongate and depressed dorsoventrally; combined length of T3–T6> T2; T1–T2 longer than wide; T3–T6 wider than long; anteromedial area of T2 smooth and flattened; T3–T5 with some parts smooth and densely covered by shallow punctuation; T6 densely covered by shallow punctuation along its anterior margin and rest smooth; T6 subtriangular.

Male. Unknown.

Etymology. The name of the species refers to its depressed metasoma.

Diagnosis. Trichacis depressa and T. acarinata have combined length of T3–T6> T2. T. depressa is hitherto the only Neotropical species with a depressed metasoma and with EH> IOS.

Material examined. Holotype: 1 Ƥ, COSTA RICA, San José, Cerro de la Muerte, 19 km S, 3 km W Empalme, 2600 m, April–July 1992, MT, P. Hanson ( CNCI); paratypes: 3 Ƥ, with same data as holotype, (2 at CNCI and 1 at ICN); 1 Ƥ S.J. Cerro de la Muerte. November 1992, 2600 m, MT, P. Hanson ( CNCI).

Holotype is deposited in CNCI.

CNCI

Canadian National Collection Insects

ICN

Instituto de Ciencias Naturales, Museo de Historia Natural

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Platygastridae

Genus

Trichacis

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