Genus Platyorthis Schuchert & Cooper, 1931

Type species: Orthis planoconvexa Hall, 1859 .

Stratigraphic distribution: Pridolian to Eifelian (Upper Siluriann to lower Middle Devonian). Geographic distribution: cosmopolitan.

MIN 0001440.1-3

Platyorthis circularis (Sowerby, 1842)

Locality: Stadtfeld, Eifel region, Germany Stratigraphy: Stadtfeld beds, Lower Emsian, upper Lower Devonian Platyorthis circularis (Sowerby, 1842)

Locality: Engelpfad, Koblenz, Middle Rhine area, Germany

Stratigraphy: Emsquarzit, lower Upper Emsian, lower Upper Emsian, upper Lower Devonian MIN 0001629

Platyorthis circularis taunica (Fuchs, 1915)

Locality: Menzenberg, Bad Honnef, Middle Rhine area, Germany Stratigraphy: Taunusquarzit Formation, Upper Pragian, middle Lower Devonian