Abstract
The diagnostic characters of the Chinese planthopper genus Tetricodes Fennah, 1956 are redefined. Three new species of this genus, T. ansatus Chang & Chen, sp. n. (China: Guangxi), T. parvispinus Chang & Chen, sp. n. (China: Guizhou) and T. similis Chang & Chen, sp. n. (China: Guizhou) are described and illustrated. The female genitalia of the genus is described and illustrated for the first time. A checklist and key to the species of Tetricodes are given. The synonymy of Tetricodes songae Zhang & Chen, 2009 with Tetricodes polyphemus Fennah, 1956, syn. n., is proposed.
Highlights
The planthopper tribe Parahiraciini Cheng & Yang, 1991 (Hemiptera: Issidae) is a relatively small tribe distributed mainly in the Oriental region and occurring in the Palaearctic region (Bourgoin 2016)
The genus Tetricodes was established by Fennah (1956) for T. polyphemus Fennah, 1956 as the type species from China (Hubei), with generic characters mainly based on a female specimen
The main aim of this paper is to describe three new species of Tetricodes (Hemiptera: Issidae) from China (Guangxi, Guizhou), and propose a new species synonym
Summary
The planthopper tribe Parahiraciini Cheng & Yang, 1991 (Hemiptera: Issidae) is a relatively small tribe distributed mainly in the Oriental region and occurring in the Palaearctic region (Bourgoin 2016). The genus Tetricodes was established by Fennah (1956) for T. polyphemus Fennah, 1956 as the type species from China (Hubei), with generic characters mainly based on a female specimen. Zhang and Chen (2009) transferred Tetricodes from the tribe Thioniini Melichar, 1906 to Parahiraciini and were first to recorded the male genitalia of the type species and one other species, T. songae from Guizhou, China. According to the frons with or without a light median line, Gnezdilov (2015) proposed that T. polyphemus in Zhang and Chen (2009) was a new species, T. fennahi Gnezdilov, 2015; up to date, the genus includes four species
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