Etmaria triquetra Cao & Zhang, 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 : 347

15. Etmaria triquetra Cao & Zhang sp. nov.

Figs 10 , 19 m–p

Description. Vertex, face and mesonotum pale yellow with orange tint, vertex with pair of dark patches on transition to face, midline of frontoclypeal area and anteclypeus dark, eyes black. Pronotum dark orange. Basal triangles on mesonotum orange brown. Forewing light brown. Crown fore margin rounded apically, coronal suture distinct basally, anteclypeus long.

Anal tube very short, appendage extended from base, broad, slightly serrated on cephalic margin.

Boundary between basal and distal pygofer lobes oblique and rounded; ventral appendage tubular, slightly sinuated, directed caudad, surpassing hind margin of lobe, without rigid setae at base. Subgenital plate with large distal disc, with about 3 macrosetae. Style with apical part thick and long, straight in dorsal view, apex pointed and curved in lateral view. Connective with manubrium long and narrow, margin of central lobe almost straight. Aedeagal shaft short and very slim, directed dorsad, with pair of tiny triangular processes near base, atrium very long in lateral view, nearly rectangular in caudal view; dorsal apodeme well developed; preatrial processes short and straight.

Measurement. Male length 3.30 mm.

Material examined. Holotype: ♂, CHINA, Yunnan Prov., Yingjiang, Mangxian , 1089 m, 24°28'33''N, 97°45'02''E, 30 iv 2012, coll. Yanghui Cao. [ NWAFU].

Etymology. The new specific epithet is derived from Latin adjective “ triquetrus ” which means triangular, referring to the pair of basal triangular processes of the aedeagal shaft.

Diagnosis. The new species can be distinguished by the long anal tube appendage shifted basad and the presence of tiny triangular processes near the base of the aedeagal shaft.

Figures

FIGURE 10. Etmaria triquetra Cao & Zhang sp. nov. a. abdominal apodemes 2S; b. genital capsule; c. anal tube appendage, lateral view; d. pygofer ventral appendage, lateral view; e. subgenital plate, style and connective; f. subgenital plate, dorsal view; g. style, dorsal view; h. style, lateral view; i. connective; j. aedeagus, lateral view; k. aedeagus, caudal view.

FIGURE 19. a–d. Etmaria infumata (Kuoh, 1982) comb. n.; e–h. Etmaria magna Cao & Dietrich sp. nov.; i–l. Etmaria sinuata (Chiang & Knight, 1990) comb. n.; m–p. Etmaria triquetra Cao & Zhang sp. nov.; q–t. Etmaria ulterior Cao & Zhang sp. nov.; u–x. Thaia (Thaia) barbata Dworakowska, 1979