Pseudogonatopus nudus Perkins, 1912: 12.
Pseudogonatopus sarawaki Móczár, 1979: 77; synonymized by Olmi (1992 b). Pseudogonatopus ponomarenkoi Móczár, 1979: 80; synonymized by Olmi (1984). Gonatopus australis Xu & He, in Xu, He & Yang, 1997: 153; synonymized by Olmi (1998 d). Gonatopus oryzaetorae Xu & He, in Xu, He & Yang, 1997: 154; synonymized by Olmi (1998 d).
Material examined. Lectotype of Pseudogonatopus nudus (designated by Olmi 1982): Ƥ, Indonesia, Java, Pekalongan [BPBM]. China: Guangdong: Nankunshan Provincial Nature Reserve, on grass, parasitized host collected 3.VII. 2005, dryinid cocooning 4.VII. 2005, M. Olmi reared from adult of unidentified Delphacidae, 1 Ƥ [MOLC].
Hosts. Guglielmino & Olmi (1997, 2006) list in many countries (India, Indonesia, Malaysia, Philippines, China, Sri Lanka, Thailand) the following hosts belonging to Delphacidae: Nilaparvata lugens (Stål), Nilaparvata bakeri (Muir), Sogatella furcifera (Horváth), Toya attenuata Distant, Dicranotropis sp., Stenocranus sp.
Distribution. Oriental. China: Zhejiang, Hainan, Guangxi (Xu et al. 1997; He & Xu 2002), Guangdong (new record); Sri Lanka (Ponomarenko 1981), Philippines, India, Indonesia, Malaysia, Thailand (Olmi 1984; Olmi 1998 d).