New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae) Author Reynoso-Velasco, Daniel text Zootaxa 2017 2017-09-25 4323 4 503 518 journal article 32005 10.11646/zootaxa.4323.4.4 cafdc21f-367c-4abc-b93c-bf4338483003 1175-5326 995854 5641Cb17-Fb71-4Ebc-B178-0891C31B6Abb Genus Ambrysus Stål Ambrysus is distinguished from other members of Ambrysini ( Table 1 ) by the following suite of attributes: deep convexity of the posterior margin of the head; sternum continuously covered by a fine hair pile in both sexes; narrow lateral glabrous band on the abdominal venter in both sexes; and males with variously sized and shaped pseudoparameres of tergum VIII, symmetrical parameres, ventral lobes of the phallosoma with or without teeth, and accessory genitalic process of tergum VI usually present. Ambrysus has been organized into five subgenera ( La Rivers 1965 , Nieser et al . 1999 ). Most species are in the nominate subgenus; Melloiella comprises two species in Brazil; Syncollus includes 11 species and recently was reviewed by Reynoso-Velasco et al. (2016); Acyttarus is monotypic and occurs in Death Valley, California ( La Rivers 1949 , Whiteman & Sites 2008 ); and Picrops is monotypic ( La Rivers 1952 ), distributed in the Neotropics, and is elevated to genus rank herein (see below).