Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species Author Arias-Penna, Tania Milena Author Masner, Lubomir Author Delsinne, Thibaut text Zootaxa 2012 3337 1 56 journal article 10.5281/zenodo.281325 706d7536-7046-48ee-a586-a7bd417b58eb 1175-5326 281325 Key to Neotropical Species of Trichacis 1 Vertex and occiput smooth.............................................................................. 2 - Vertex and/or occiput at least partially coriaceous or coriaceous with striae........................................ 4 2 (1) Hyperoccipital carina absent ( Fig. 21 A), Costa Rica .................................... Trichacis acarinata n. sp. Ƥ - Hyperoccipital carina present............................................................................ 3 3 (2) OOL longer than LOL, T1 shorter than wide, Costa Rica ............................... Trichacis proximata n. sp. Ƥ - OOL slightly shorter than LOL, T1 as wide as long, Brazil .......................... Trichacis meridionalis (Brues) Ƥ 4 (1) Hyperoccipital carina absent ( Figs 17 C, 17D); Brazil ................................... Trichacis punctata n. sp. Ƥ - Hyperoccipital carina present ( Figs 21 B – 21E)............................................................... 5 5 (4) Hyperoccipital carina incomplete or discontinuous, but not reaching eye margin ( Figs 21 C – 21E)...................... 6 - Hyperoccipital carina complete, reaching eye margin ( Fig. 21 B).............................................. 22 6 (5) In dorsal view, hyperoccipital carina fading before or until reaching level of imaginary line connecting eye inner margin to posterior cephalic margin ( Fig. 21 C)...................................................................... 7 - In dorsal view, hyperoccipital carina surpassing level of imaginary line connecting eye inner margin to posterior cephalic margin ( Figs 21 D, 21E)................................................................................ 11 7 (6) Temple projection present ( Figs 2 B, 3A, 3B)............................................................... 8 - Temple projection absent............................................................................... 9 8 (7) Area of lateral vertex between posterior ocellus and hyperoccipital carina coriaceous ( Fig. 2 B); and between hyperoccipital carina and occipital carina coriaceous with longitudinal striae ( Fig. 1 H); Bolivia .......... Trichacis acuminata n. sp. Ƥ3 - Lateral vertex coriaceous, without striae; Colombia ........................................ Trichacis acuta n. sp. Ƥ 9 (7) Inter-notaular area entirely coriaceous ( Fig. 17 G); Mexico ............................. Trichacis sculpturata n. sp. Ƥ - Inter-notaular area with only anterior 1/3 coriaceous, other 2/3 smooth.......................................... 10 10 (9) Combined length of T3–T6 less than length of T2 ( Figs 12 A, 12E); specialized area of mesoscutellum with cone-like elevation ( Fig. 12 B); metasoma not depressed dorsoventrally; Mexico ........................... Trichacis magnifica n. sp. Ƥ3 - Combined length of T3–T6 greater than length of T2 ( Fig. 7 F); specialized area of mesoscutellum heart-shaped, moderately elevated; metasoma depressed dorsoventrally ( Fig. 8 A); Costa Rica ......................... Trichacis depressa n. sp. Ƥ 11 (6) Mesopleural carina complete ( Fig. 9 A); vertex laterally coriaceous, and with well-marked longitudinal striae between hyperoccipital carina and occipital carina ( Fig. 8 D); Colombia , Ecuador , Venezuela ............ Trichacis dianae n. sp. Ƥ3 - Mesopleural carina incomplete ( Fig. 18 E)................................................................. 12 12 (11) Hyperoccipital carina curving up and merging with stria running along the eye inner margin ( Fig. 21 E)................ 13 - Hyperoccipital carina not curving up and not merging with other stria ( Fig. 21 D).................................. 15 13 (12) Anteromedial area of T2 (i.e. area situated between anterior pits) slightly concave and with longitudinal striae ( Fig. 9 F); Ecuador ...................................................................... Trichacis fernandezi n. sp. Ƥ - T2 anteromedially (between pits) flattened and smooth....................................................... 14 14 (13) Lateral region of vertex between posterior ocellus and hyperoccipital carina weakly coriaceous, and with cluster of 4-6 well- marked longitudinal curved striae, which seem to emerge from hyperoccipital carina; lateral vertex area between hyperoccipital carina and occipital carina coriaceous ( Fig. 15 A); Ecuador ...................... Trichacis pecki n. sp. Ƥ - Lateral region of vertex between posterior ocellus and hyperoccipital carina markedly coriaceous, with 9-12 well-separated and irregularly curved longitudinal striae, and 2-3 curved transverse striae running between outer margin of posterior ocellus and inner margin of eye; lateral vertex area between hyperoccipital carina and occipital carina coriaceous, and with well- marked longitudinal striae ( Fig. 7 C); Costa Rica ....................................... Trichacis delsinnei n. sp. Ƥ 15 (12) Posteromedial region of inter-notaular area broadly concave ( Figs 5 E, 5G); Costa Rica ....... Trichacis concavata n. sp. Ƥ - Posteromedial region of inter-notaular area convex or blunt................................................... 16 16 (14) Inter-notaular area entirely coriaceous ( Figs 6 A, 6D); El Salvador ; Mexico ................. Trichacis corrugata n. sp. Ƥ - Inter-notaular area anterior 1/3 coriaceous, otherwise smooth................................................. 17 17 (16) T1 shorter than wide ( Figs 13 F, 14B).................................................................... 18 - T1 at least as long as wide.............................................................................. 19 18 (17) Faint, transverse, slightly curved striae present throughout the anterior region of vertex; distance between posterior ocellus and hyperoccipital carina longer than posterior ocellus diameter ( Fig. 14 D); Panama ........... Trichacis panamana n. sp. Ƥ3 - Presence of faint, transverse, slightly curved striae restricted to interocellar area; distance between posterior ocellus and hyperoccipital carina shorter than posterior ocellus diameter ( Fig. 13 C); Mexico ........... Trichacis mexicana n. sp. Ƥ3 19 (17) Length and width of T1 equal ( Fig. 5 A); all lateral vertex region coriaceous...................................... 20 - T1 longer than wide ( Fig.18 C); lateral region of vertex betweeen posterior ocellus and hyperoccipital carina coriaceous, and between hyperoccipital carina and occipital carina with well-marked longitudinal striae ( Fig. 18 E); Costa Rica ........................................................................................ Trichacis transversata n. sp. Ƥ 20 (19) Notaulus present ( Fig. 9 H)............................................................................. 21 - Notaulus absent ( Fig. 5 A); Colombia ............................................ Trichacis colombiana n. sp. Ƥ 21 (20) Vertex laterovertically striate-coriaceous; Honduras ........................................ T. laticornis Buhl 2001 - Vertex laterally coriaceous, without striae; Brazil , Costa Rica , Nicaragua , Panama ........... Trichacis hansoni n. sp. Ƥ 3 22 (5) Mesopleural carina complete ( Fig. 15 F); Mexico ........................................ Trichacis procera n. sp. Ƥ - Mesopleural carina incomplete ( Fig. 20 E)................................................................ 23 23 (22) Notaulus absent ( Fig. 11 A); Mexico .............................................. Trichacis kaulbarsi n. sp. Ƥ3 - Notaulus present..................................................................................... 24 24 (23) Clypeus fused with interantennal process, forming rounded yellow-brown projected sheet ( Fig. 4 B); Costa Rica ........................................................................................ Trichacis clypeata n. sp. Ƥ3 - Clypeus and interantennal process well-separated, not forming projecting lamella................................. 25 25 (24) Combined length of T3–T6 less than length of T2......................................................... 26 - Combined length of T3–T6 greater than length of T2; Brazil ......................... Trichacis ariaspennae Buhl 2011 26 (25) Distance between posterior ocellus and hyperoccipital carina less than diameter of posterior ocellus ( Fig. 20 C); specialized area of mesoscutellum triangular and moderately elevated ( Figs 18 H; 20E); Mexico ....... Trichacis triangulata n. sp. Ƥ3 - Distance between posterior ocellus and hyperoccipital carina greater than diameter of posterior ocellus; specialized area of mesoscutellum circular and elevated ( Fig. 6 F); Costa Rica ............................. Trichacis costaricana n. sp. Ƥ