Classification of Oraspold 1959

†Platystrophia lutkevichi Alikhova 1951
show all | hide all
Subg. †Dinorthis (Plaesiomys) Hall and Clarke 1892
show all | hide all
Or. †Protremata Beecher 1891
show all | hide all
Superfm. †Orthacea Woodward and Schuchert 1852
hide
Fm. †Orthidae Woodward 1852
hide
G. †Barbarorthis Opik 1934
+
†Barbarorthis porkuniensis Oraspold 1959
G. †Boreadorthis Opik 1934
+
G. †Hesperorthis Schuchert and Cooper 1931
+
†Hesperorthis mucronata Oraspold 1959
G. †Nicolella Reed 1917
G. †Orthis Dalman 1828
Fm. †Plectorthidae Schuchert and Le Vene 1929
hide
G. †Platystrophia King 1850
+
†Platystrophia orbiculata Oraspold 1959
Invalid names: Dinorthidae Schuchert and Cooper 1931 [empty]