Gastropoda - Euomphalina - Palaeotrochidae
Alternative combination: Floydia concentrica
Invalid subtaxa: Floyda concentrica multisinuata Fenton 1918, Floyda depressa Webster 1906, Floyda gigantea Hall and Whitfield 1873 [replaced name], Floyda multisinuata Fenton 1918, Floydia gigantea Hall and Whitfield 1873 [replaced name], Floydia magnifica Webster 1905, Naticopsis gigantea Hall and Whitfield 1873 [replaced name], Naticopsis gigantea depressa Webster 1906, Naticopsis magnifica Webster 1905, Platyceras (Platyostoma) gigantea Hall and Whitfield 1873 [replaced name]
Full reference: C. L. Webster. 1905. Description of a new gastropod genus (Westerna) from the Hackberry group of Iowa. Iowa Naturalist 1:54-55
Belongs to Floyda according to P. J. Wagner 2023
See also Bass and Northrop 1963, Day 1987, Fenton 1918, Fenton and Fenton 1924, Hall and Whitfield 1873, Kindle 1909, Webster 1905, Webster 1905, Webster 1906 and Webster 1909
Sister taxon: Floyda obliqua
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of United States (10: Colorado, Iowa collections)
Total: 10 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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