Ammocoetus Duméril [A. M. C.] (ex d'Hallois) 1812:16 Masc. Petromyzon branchialis Linnaeus 1758. Type by subsequent designation. If above is first appearance, then type is Petromyzon rouge Lacepède, the only species mentioned. Type as branchialis designated by Jordan & Gilbert 1883:9 [ref. 2476]. Also spelled Ammocoetes (dating to Duméril in Cuvier 1816). Also appeared as new (sensu Gesner) in Billberg 1833:50 [ref. 34146]; see Kullander 2016:106 [ref. 34147]. •Synonym of Petromyzon Linnaeus 1758. Current status: Synonym of Petromyzon Linnaeus 1758. Petromyzontidae.