Trichacis hansoni 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 : 21-23

Trichacis hansoni Arias-Penna & Masner , new species

Figures 9 G, 9H; 10A–10E

Female. Body length: 2.20 mm (holotype); 1.85–2.60 mm (paratypes, n=37); mean length ± SD = 2.22 ± 0.17 mm. Black; A1 yellow; A2–A10 brown; mandible yellow with base and apex brown; leg yellow; fore wing infuscate.

Head, in dorsal view, 2.1 times as wide as long; EH <IOS; interocellar area finely coriaceous; OOL> LOL; antennal clava 3-segmented; A1 not reaching vertex dorsal margin; A2–A6, A8, A10 longer than wide; A7 as long as wide; A9 wider than long; base of mandible smooth; frons above interantennal process and torulus with four transverse striae; interantennal process with transverse striae and reaching, but not surpassing, ventral border of torulus; clypeus exposed; clypeal margin weakly convex; 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 slightly arched; antero-admedian line weakly marked; notaulus almost percurrent; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area with basal 1/3 coriaceous, and posterior 2/3 smooth; posteromedial region of inter-notaular area convex; parapsidal line present; area of the pronotum between epomiae smooth; specialized area of mesoscutellum heart-shaped, moderately elevated; median projection of specialized area of mesoscutellum rectangular, borded laterally by a broad tuft of hairs; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.25); fore wing slightly surpassing apex of metasoma.

Metasoma elongate; combined length of T3–T6 <T2; T1, T2 as long as wide; T3–T6 wider than long; T2 anteromedial area smooth and flattened; T3 smooth along its margin anterior and rest densely covered by shallow punctuation; T4–T6 densely covered by deep punctuation; T6 subtriangular.

Male. Body length: 2.20 mm (allotype); 2–2.30 mm (paratypes, n=6); mean length ± SD = 2.17 ± 0.10 mm. Similar to female except the following: antenna filiform, A1–A10 brown, fore and mid legs, including coxae, yellow; hind leg with coxa dark brown, trochanter and femur yellow, tibia and tarsi brown; A7–A9 longer than wide.

Etymology. Named after Paul E. Hanson, the collector of numerous specimens of this species, including the holotype and the allotype.

Diagnosis. Trichacis hansoni is the single species with the combined characters: T1 and T2 as long as wide; specialized area of mesoscutellum heart-shaped, moderately elevated, with a rectangular median projection bordered laterally by a broad tuft of hairs, distance between posterior ocellus and hyperoccipital carina shorter than posterior ocellus diameter.

Material examined. Holotype: 1 Ƥ, COSTA RICA, San José, Zurqui de Moravia, 1600 m, April 1995, MT, P. Hanson ( CNCI); allotype: 1 3. Punt. San Vito, Biol. Sta Las Alturas, 2050 m, September–November 1992, P. Hanson ( CNCI); paratypes: 2 Ƥ, with same data as holotype ( CNCI); 1 Ƥ, with same data as holotype but captured in September 1996 ( CNCI); 1 Ƥ, with same data as holotype but caught in October 1995 ( ICN); 9 Ƥ, Heredia, Porrosati, 10º05´34´´N 84º06´41´´W, 1900 m, August 22 1988, YPT, L. Masner ( CNCI); 3 Ƥ, Heredia, Río Ceruelas, 10º05´41´´N 84º06´41´´W, 1600 m, August 22–30 1988, YPT, creek, L. Masner ( CNCI); 10 Ƥ, with same data as allotype ( CNCI); 2 Ƥ, Cartago, La Congrega, 1950 m, June–July 1992, P. Hanson ( CNCI); 1 Ƥ, Cartago, Cangreja, 1950 m, July 1991, MT, P. Hanson ( CNCI); 1 3, Guan. GCA. Est Pitilla, 700 m, February 12–27 1996, J. S. Noyes. MT/YPT ( CNCI); 3 Ƥ, San Vito de C.B., Las Cruces, 1200 m, July 9–August 7 1982 ( CNCI); 1 Ƥ, BRAZIL: Est. Rio de Janeiro, Silva Jardim, August 1974. F.M. Oliveira ( CNCI); 1 3, NICARAGUA: 50 km E Matagalpa, El Coyolar, 800 m, June 1991, at light, S. Hue ( CNCI); 3 3, 1 Ƥ, PANAMA: Chiriquí, 6 km NE Boquete, 1650 m, June 1996, FIT, J. Ashe & Brooks ( CNCI); 1 Ƥ, Chiriquí, La Fortuna, Hydro trail, 1450 m, May 23–June 9 1996, FIT, J. Ashe & Brooks ( CNCI); 1 Ƥ, Chiriquí, Prov. 2 km W Cerro Punta, 1700 m, May 19 –June 1977, Peck & Howden ( CNCI); 1 3, Cerro Campana, 825 m, June 1–5 1995, FIT, J. Ashe & Brooks ( CNCI); 1 Ƥ, Chiriquí Cerro Pando, 8°54´N 82°47´W, 1875 m, July 17–18 1996, FIT, J. Ashe & Brooks ( CNCI).

Holotype is deposited in CNCI.

Figures

FIGURE 9. Bright field images of Trichacis species. A: Trichacis dianae Arias-Penna & Masner, n. sp., 3 (Allotype), head, mesosoma and anterior metasoma, lateral view. B – F: Trichacis fernandezi Arias-Penna & Masner, n. sp., Ƥ (holotype). B, head and ventral mesosoma, anterior view; C, habitus, dorsal view; D, habitus, lateral view; E, head, dorsal view; F, head, mesosoma and anterior metasoma, dorsal view. G, H: Trichacis hansoni Arias-Penna & Masner, n. sp., Ƥ (holotype). G, head, anterior view; H, habitus, dorsal view.