Revision of the New World leafhopper genus Neozygina Dietrich & Dmitriev (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini) Author Dietrich, C. H. Author Dmitriev, D. A. text Zootaxa 2007 2007-05-17 1475 27 42 journal article 1175­5334 94D58D6A-8BB6-428F-BB98-91FA42CF1614 Neozygina Dietrich & Dmitriev, 2006 Diagnosis. Crown weakly to moderately produced medially, with pair of large brown or black preapical spots; mesonotum with basal triangles usually dark brown, contrasting with remainder of sclerite; forewing lacking distinct spots or oblique patterns, inner apical cell with base oblique; male pygofer with dorsal appendage well developed (except N. obsoleta , n. sp. ), immovably fused to pygofer margin; one or more macrosetae present basad of dorsal appendage; ventral appendage present, usually elongate. Style apex truncate, footlike, with only two points, preapical lobe well developed. Connective U-shaped, without median anterior lobe, arms short. Aedeagus with dorsal apodeme well developed, usually T-shaped in posterior view, without sclerotized connection to dorsal pygofer appendage or anal tube; shaft often with paired or unpaired basal or distal processes, or both; unpaired basal process, when present, closely appressed to shaft. Distribution. Western United States south to Argentina . Notes. Phylogenetic analysis of morphological data recovered Neozygina as the monophyletic sister group to a clade comprising the New World genera Mexigina , Hepzygina , and Zyginama ( Dietrich & Dmitriev 2006 ) . The genus previously included 10 described species, 1 of which is here treated as a junior synonym. An additional 16 species discovered during this study are described below. The following key will separate adult males; females of most species may only be reliably identified through their association with males.