Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico Author Huber, John T. Author Read, Jennifer D. Author Triapitsyn, Serguei V. text Zootaxa 2020 2020-05-12 4773 3 1 411 journal article 22231 10.11646/zootaxa.4773.1.1 d1ca4b58-0fd8-4bcb-8f81-12fc2c106b55 1175-5326 3821373 B1D8D67C-4FDC-477E-872F-E8BCD4D027FB OMYOMYMAR Schauff, 1983 ( Figs 677–714 ) Omyomymar Schauff, 1983: 544 . Type species: Paranaphoidea silvana Ogloblin, 1935 , by original designation. Caenomymar Yoshimoto, 1990: 49–50 . Type species: Caenomymar howdeni Yoshimoto , by monotypy. Synonymy by Aquino et al. , 2016: 588 . Diagnosis . Body length 495–950 μm. Clava 2-segmented, the apical segment usually with a nipple-like projection ( Fig. 684 ); mandibles minute stubs with apices not overlapping or extending to each other when closed ( Fig. 678 ) ovipositor long and usually distinctly exserted posterior to apex of gaster ( Figs 677 , 689 , 690 ). Males are distinguished by the scape with inner surface covered in spine-like projections ( Fig. 685 ). Discussion . The head is strongly sexual dimorphic in Omyomymar , unlike the remaining three genera with fe- male clava 2-segmented [ Anaphes ( Patasson ) , Schizophragma , Platystethynium ( Platypatasson ) ] but like Krokella , in which the male head, especially the gena, is relatively enlarged ( Figs 680 , 683 ) compared to the female ( Figs 678 , 682 ) and this difference even applies to the pronotum where the female pronotum ( Fig. 686 ) is much shorter than the male pronotum ( Fig. 691 ), though it is not certain that the two specimens are conspecific. The male eye is relatively much smaller than the female eye. The slightly indented mesophragma, light coloured base of the gaster, and apical two segments of the male flagellum widely joined suggest that Schizophragma may be the most similar genus, though the considerable difference in head size between male and female is similar to that in Krokella . Important references . Schauff (1983) , Lin & Chiappini (1996) .