Etmaria Cao & Dmitriev, 2020

Cao, Yanghui, Dmitriev, Dmitry A., Dietrich, Christopher H. & Zhang, Yalin, 2020, Review of the leafhopper genus Thaia Ghauri and related genera (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini), Zootaxa 4868 (3), pp. 331-367 : 335-337

Etmaria Cao & Dmitriev gen. nov.

Type species: Parathaia infumata Kuoh, 1982 , here designated.

Description. Body robust, ground color pale grey to black, sometimes dark orange, usually without patches. Head narrower than pronotum, crown fore margin subparallel to hind margin, usually with distinct coronal suture. Face convex in profile, anteclypeus oval, short to long, lorum large. Pronotum with pair of large triangular impressions. Forewing with third apical cell widest, fourth apical cell not reached apex of wing, slightly shorter than third apical cell. Hind wing venation usual for Erythroneurini, RA vein absent.

Male abdominal apodemes 2S very small, not extended to hind margin of sternite III. Anal tube well sclerotized, with solid, long appendages usually extended from distal half, slightly curved ventro-cephalad, additional pair of short appendages sometimes present near base of the anal tube, rarely with basal appendages only.

Pygofer lobe well sclerotized in basal half, distal lobe membranous, rounded or truncate apically, usually with clear boundary between basal and distal lobes, setosity rudimentary; dorsal appendage absent; ventral appendage articulated with pygofer lobe at boundary between basal sclerite and apical membrane, tubular or lamellate, basal part enlarged, with numerous small tubercles or rigid setae basally. Subgenital plate surpassing hind margin of pygofer lobe, wide basally and narrowing towards apex, distal disc usually expanded vertically; with row of 2–5 macrosetae near outer margin and row of rigid setae along lateral margin from subbase to apex. Style with apical part slender, short to long, preapical lobe greatly expanded, nearly triangular. Connective lamellate, manubrium narrow to broad, with distinct central ridge, central lobe well developed. Aedeagal shaft tubular, usually with papillae apically, atrium well developed, elongated or widened; dorsal apodeme rudimentary to large; preatrium long, with or without pair of preatrial processes, process usually present in species with widened atrium; gonopore terminal.

Etymology. The new generic name is an arbitrary combination of letters; the gender is feminine.

Diagnosis. This new genus resembles Thaia Ghauri in external morphology and its male genitalia are most similar to Nlunga Dworakowska , but it can be distinguished from both genera by the pygofer ventral appendage articulated to the lobe and with small tubercles or setae basally. Compared to Nlunga , species of Etmaria gen. n. lack the foveate sculpture on the pronotum, have the base of the pygofer ventral appendage expanded and have 0-1 pair of preatrial processes on the aedeagus. The new genus differs from Thaia (Thaia) in the position of the anal tube appendage (usually on ventral margin of distal half in Etmaria , basal in Thaia , sometimes even separate from the 1 st segment of the anal tube), the texture of the pygofer lobe (sclerotized basally and membranous apically in Etmaria , entirely sclerotized in Thaia or only membranous at the area between the lobe and the ventral appendage), the position of the pygofer ventral appendage (extended from the middle of the ventral margin in Etmaria , extended from the distal angle of the ventral margin in Thaia ) and the length of the aedeagus shaft (usually much longer in Thaia ).