Taxonomic study of the genus Aoyuanus Ding & Chen, with descriptions of two new species (Hemiptera, Fulgoromorpha, Delphacidae) Author Zhou, Zheng-Xiang Author Yang, Lin Author Chen, Xiang-Sheng text ZooKeys 2019 822 53 65 http://dx.doi.org/10.3897/zookeys.822.26929 journal article http://dx.doi.org/10.3897/zookeys.822.26929 1313-2970-822-53 6197AA2E1BE943C99535F8EF2C886FFF Aoyuanus Ding & Chen, 2001 Aoyuanus Ding & Chen, 2001: 328; Ding, 2006: 358. Type species. Aoyuanus furcatus Ding & Chen, 2001, by original designation. Diagnosis. Small sized. Frons with median carina forked at base (Figs 5, 24, 44). Pygofer asymmetrical in posterior view (Figs 12, 31, 51). Aedeagus forked at base (Figs 15, 16, 34, 35, 54, 55). Parameres simple, asymmetrical (Figs 17, 18, 36-38, 56-59). Description. Coloration. General color yellow to black (Figs 1, 2, 20, 21, 40, 41). Head with vertex, frons, face and antennae yellow to dark brown (Figs 4-6, 23-25, 43-45). Postclypeus paler than frontoclypeus (Figs 5, 24, 44). Pronotum and mesonotum yellow to yellowish brown (Figs 4, 23, 43). Forewings hyaline, with dark marking at apex (Figs 4, 23, 43). Legs yellow to yellowish brown (Figs 1, 2, 21, 22, 40, 41). Abdomen black, with yellow marking at lateral margins (Figs 1, 2, 21, 22, 40, 41). Structure. Head including eyes narrower than pronotum (Figs 4, 23, 43). Vertex subquadrate, apically arched or truncate, keeled carinae project or not, narrower at apex than at base, submedian carinae not uniting at apex (Figs 4, 23, 43). Frons with median carina forked between eyes, longer at middle line than wide at widest part , widest at top of ocelli, lateral carinae distinctly narrowed dorsally between eyes (Figs 4, 5, 23, 24, 43, 44). Antennae cylindrical, with basal segment shorter than second, reaching postclypeus suture (Figs 5, 24, 44). Pronotum with lateral carinae almost attaining hind margin (Figs 4, 23, 43). Posttibial spur with approximately 12-20 teeth. Male genitalia. Pygofer in profile distinctly wider ventrally than dorsally, asymmetrical in caudal view. Medioventral process at ventral margin of pygofer opening (Figs 10-12, 29-31, 49-51). Diaphragm broad, with dorsal margin incised, V-shaped (Figs 12, 31, 51). Aedeagus forked at base (Figs 15, 16, 34, 35, 54, 55). Parameres simple, asymmetrical (Figs 17, 18, 36-38, 56-59). Suspensorium present, Y-shaped, relative length between anal segment and aedeagus (Figs 19, 39, 60). Anal segment with a pair of processes or none (Figs 13, 14, 32, 33, 52, 53). Distribution. Oriental region (China). Remarks. This genus is extremely similar to Indozuriel Fennah, 1973 in appearance and is similar to Javesella Fennah, 1963 in shaped of aedeagus, but can be easily distinguished from the latter by the pygofer asymmetrical in caudal view (pygofer symmetrical in caudal view in Indozuriel and Javesella ); parameres asymmetrical (parameres symmetrical in Indozuriel and Javesella ). Key to species of genus Aoyuanus (males)

121314	A. furcatus
315132335253	2
313233	A. spathulus sp. n.
515253	A. varius sp. n.