Review of the leafhopper genus Thaia Ghauri and related genera (Hemiptera: Cicadellidae: Typhlocybinae: Erythroneurini) Author Cao, Yanghui 0000-0002-0515-0767 Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Entomological Museum, Northwest A & F University, Yangling, Shaanxi 712100, P. R. China & Illinois Nature History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S Oak St., Champaign, IL 61820, USA & caoyh @ illinois. edu; https: // orcid. org / 0000 - 0002 - 0515 - 0767 caoyh@illinois.edu Author Dmitriev, Dmitry A. 0000-0002-3293-4794 Illinois Nature History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S Oak St., Champaign, IL 61820, USA & arboridia @ gmail. com; https: // orcid. org / 0000 - 0002 - 3293 - 4794 arboridia@gmail.com Author Dietrich, Christopher H. 0000-0003-4005-4305 Illinois Nature History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 1816 S Oak St., Champaign, IL 61820, USA & chdietri @ illinois. edu; https: // orcid. org / 0000 - 0003 - 4005 - 4305 chdietri@illinois.edu Author Zhang, Yalin Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Entomological Museum, Northwest A & F University, Yangling, Shaanxi 712100, P. R. China text Zootaxa 2020 2020-10-28 4868 3 331 367 journal article 8891 10.11646/zootaxa.4868.3.2 03a9be04-f633-4adc-8397-058c282f216b 1175-5326 4417761 256D29E7-5148-415C-AD06-5F1F6D986887 Pseudothaia caudata Song & Li, 2013 Pseudothaia caudata Song & Li, 2013: 223 , Figs 1–3 , 4–13 Remarks. This species is similar to some species of Thaia Ghauri and Etmaria gen. n. in the shape of the subgenital plate, style and aedeagus. However, its pygofer lobe is very narrow and tapering apically, which differs from Thaia and Etmaria . The pygofer lobe and the small ventral process of P. caudata looks like the pygofer ventral appendage of P. striata , but the other structures are very different. This species is here treated as Incertae sedis within Erythroneurini . Thaia ( Nlunga ) leishanensis ( Song & Li, 2007 ) Parathaia leishanensis Song & Li, 2007: 64 , Figs 1–11 Thaia ( Nlunga ) leishanensis : Song & Li, 2014: 185 Remarks. This species was originally placed in Parathaia Kuoh , then transferred to Thaia ( Nlunga ) . Most of the Oriental species of Thaia ( Nlunga ) are now transferred to Etmaria gen. n. , however, this species lacks all the key characters of the new genus. Therefore, it is here treated as incertae sedis within Erythroneurini .