◆エリプティキウス・アメリカヌス (絶滅) †Eriptychius americanus Walcott 1892
syn.Eryptichius americanus (Walcott 1892) ※スペルミス。 *1892『Preliminary Notes on the Discovery of a Vertebrate Fauna in Silurian, Ordovician Strata, Description of Ichthyic Fauna:Charles Doolittle Walcott』。 *1902『Bibliography and Catalogue of the Fossil Vertebrata of North America 1901:Oliver Perry Hay』。 *2005『Late Ordovician Vertebrates from the Bighorn Mountains of Wyoming, USA:Ivan James Sansom
& Michael Paul Smith』。
◆エリプティキウス・オルウィギ (絶滅) †Eriptychius orvigi Denison 1967 *1967『Ordovician Vertebrates from Western United States:Robert Howland Denison』。