Revision of the strongly flattened Megaprosternum Azevedo (Hymenoptera, Bethylidae) Author Colombo, Wesley D. B9D7FDE3-BDD8-4714-A53F-640A0994E5F6 Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Av. Fernando Ferrari 514, Goiabeiras, 29.075 - 910, Vitória, ES, Brazil. wesleycolombo@gmail.com Author Azevedo, Celso O. CD98B489-7611-4A33-AF53-3016B9DA1617 Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Av. Fernando Ferrari 514, Goiabeiras, 29.075 - 910, Vitória, ES, Brazil. bethylidae@gmail.com text European Journal of Taxonomy 2024 2024-09-13 958 1 1 47 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2659/12299 journal article 10.5852/ejt.2024.958.2659 2118-9773 13758948 6FFE3969-D8EF-4082-9107-F98187116C28 Megaprosternum kariri sp. nov. urn:lsid:zoobank.org:act: FA0E9696-2136-4328-AD56-2714EB9623DE Fig. 6 Differential diagnosis The females of this species are morphologically similar to those of M. bayaka sp. nov. as aforementioned in its section of the differential diagnosis. Etymology The epithet kariri is derived from the Kariri, the main family of indigenous languages in the hinterlands of Northeast Brazil , including the first indigenous settlement with officially demarcated territory in Piauí . Material examined Holotype BRAZIL – Piauí • ♀ ; “ Pi [auí], Guaribas , 515m , PAR[que] NA[cional] Serra das Confusões, Andorinha, 09°08’27.8’’S 43°33’42.1’W, suspensa dupla ( 20m ), 01–10.ix.2013 , J.A. Rafael , F. Limeira-de-Oliveira & T.T.A. Silva , cols.”; CZMA . Fig. 6. Megaprosternum kariri sp. nov. , holotype, ♀ (CZMA). A–B . Habitus. A . Lateral view. B . Dorsal view. C . Head, dorsal view. D–E . Mesosoma. D . Dorsal view. E . Ventral view. Scale bars: A–B = 500 μm; C–E = 125 μm. Description Female MEASUREMENTS (mm). Body length 2.50; LH 0.57; WH 0.40; WF 0.26; WOT 0.16; surface of median clypeal lobe 0.05; HE 0.20; OOL 0.25; LFW 1.33. COLOR ( Fig. 6A–B ). Head, mesosoma and metasoma dark castaneous. HEAD ( Fig. 6C ). Rectangular, in lateral view; sides almost parallel, in dorsal view; malar space 0.3× HE; median clypeal lobe straight, longer than lateral ones, without pair of lateral carinae, lobe delimitation indistinct; mandible with four apical teeth; hypostoma almost straight medially; antenna with 10 flagellomeres, pedicel longer than flagellomere I; eye glabrous, contour protruding; frons coriaceous; ocellar triangle with anterior angle obtuse, postocellar line shorter than DAO. MESOSOMA ( Fig. 6D–E ). Pronotal flange polished, with posterior margin at least 1.6× as wide as anterior one; dorsal pronotal area coriaceous, posterior margin almost straight; probasisternum large, anterior margin weakly angulated, posterior margin curved; epicnemium with anterior margin almost straight; mesoscutum longer than mesoscutellum medially; parapsidal signum absent; transscutal fissure conspicuous; mesoscuto-scutellar suture absent; mesopleuron with mesepimeral lobe evident, anterior mesopleural fovea absent, mesopleural epicoxal lobe evident, mesopleural pit absent, upper mesopleural fovea absent; metapectal-propodeal disc longer than wide medially, without evident constriction at propodeal spiracle; transverse anterior carina present; lateral marginal carina absent; paraspiracular sulcus absent; paraspiracular carina absent; metapostnotal median carina absent; propodeal spiracle circular, on lateral surface of the metapectal-propodeal complex; metadiscrimen absent; metafurcal pit absent; forewing with prestigmal abscissa of radial 1 oval, 3.0× as long as pterostigma, 3.0 ×as wide as Sc+R vein, prestigmal flexion line absent, pterostigma small and circular; hind wing slender with three equidistant distal hamuli. METASOMA . S2aa with anterior margin straight; S2pa longer than wide medially, widening posterad; second abdominal spiracle circular; third abdominal sternum with anterior margin incurved; abdominal tergum narrowing apicad. Male Unknown. Host Unknown. Distribution Brazil ( Piauí ).