Vertebrata - Cotylosauria

Alternative combinations: Sauroidichnites baileyi, Triaenopus baileyi

Synonyms: Sauroidichnites emmonsii Hitchcock 1841, Triaenopus emmonsianus Hitchcock 1841, Triaenopus leptodactylus Hitchcock 1858

Belongs to Triaenopus according to R. S. Lull 1904

Sister taxon: Triaenopus lulli

Type specimens:

• Triaenopus baileyanus: AC 31/27, a footprint. Its type locality is Wethersfield tracksite, which is in a Hettangian/Sinemurian fluvial-lacustrine shale/sandstone in the Portland Formation of Connecticut.
• Triaenopus emmonsianus: Its type locality is Wethersfield tracksite, which is in a Hettangian/Sinemurian fluvial-lacustrine shale/sandstone in the Portland Formation of Connecticut.
• Triaenopus leptodactylus: