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 KROKELLA Huber, 1993 ( Figs 500–518 ) Krokella Huber, 1993: 349 . Type species: Krokella fera Huber, 1993 , by original designation. Diagnosis . Body length 385–485 μm. Face without subantennal sulci ( Fig. 501 , 513 ); clava 3-segmented ( Figs 500 , 504 ); mandible a minute stub without teeth ( Figs 501 , 513 ); ocular apodeme apparently absent but ocular ridge with anterior margin greatly thickened ( Fig. 503b ); frenum divided medially by longitudinal sulcus ( Figs 511 , 515 ); fore wing with venation extending more than half wing length. Male with mandible enormous, crocodile-like ( Figs 508 , 518 ); flagellum 9-segmented ( Fig. 509 ). FIGURE 500 . Krokella fera Huber , male paratype, habitus. USA, Florida, Dade Co., Everglades National Park, Long Pine Key, 31.viii–9.xii.1986, S. & J. Peck, pineland forest. Scale bar=500 μm. FIGURES 501–504 . Krokella sp. 501, head, anterior; 502, head, posterior; 503a, head, lateral; 503b, head lateral (internal) showing ocular apodeme (as anteriorly thick ocular ridge); 504, antenna. Scale bars=100 μm. Discussion . Only two other Nearctic genera, Neostethynium and Stethynium , have the clava 3-segmented. Krokella differs from both by having the fore wing venation extending more than half the wing length. It is similar to Neostethynium based on the very similar male mandible, and to Stethynium based on the longitudinally divided frenum. Important reference . Huber (1993) .