Linoprotonia Ferguson, 1971

Carniti, Alessandro P., Porta, Giovanna Della, Banks, Vanessa J., Stephenson, Michael H. & Angiolini, Lucia, 2022, Brachiopod fauna from uppermost Visean (Mississippian) mud mounds in Derbyshire, UK, Acta Palaeontologica Polonica 67 (4), pp. 865-915 : 896

Genus Linoprotonia Ferguson, 1971

Type species: Productus hemisphaericus Sowerby, 1822 , from the Asbian , upper Visean, of Somerset, England , and Wales.

Remarks.—The genus was erected by Ferguson (1971) for Mississippian linoproductoid species formerly attributed to Linoproductus Chao, 1927 , but differing from the upper Carboniferous–Permian species assigned to the latter in having internal characters similar to those of Gigantoproductus Prentice, 1950 . Externally, Linoprotonia species differ from those of Gigantoproductus in being smaller, in having a shorter cardinal margin and less developed ears, a more enrolled umbo, thinner shell substance, finer radial ornamentation and in commonly lacking plicae on trail.