Monotretus Troschel [F. H.] (ex Bibron) 1856:88 Masc. Tetrodon cutcutia Hamilton 1822. Appeared first as Monotréte Bibron in Duméril 1855:280 [ref. 297]; latinized by Troschel 1856 as above, also by Hollard 1857:319 [ref. 2186] as Monotreta. Kottelat regards Monotréte Bibron as Latinized and available, and we tentatively follow him. First addition of species not researched; type above as given by Jordan 1919:263 [ref. 2410] for Monotretus. •Valid as Monotretus Troschel 1856 -- (Tyler 1980:341 [ref. 4477]). •Synonym of Tetraodon Linnaeus 1758 -- (Fraser-Brunner 1943:14 [ref. 1495], Arai 1983:207 [ref. 14249] as Monotreta, Ebert 2001:91 [ref. 25494]). •Synonym of Leiodon Swainson 1839 -- (Kottelat 2013:478 [ref. 32989]). Current status: Synonym of Leiodon Swainson 1839. Tetraodontidae.