Classification of the genus Polytryphocycloides
G. †Polytryphocycloides Smith and Paul 1982
show all | hide all
†Polytryphocycloides billingsi Wilson 1946
†Polytryphocycloides davisii Salter 1858
†Polytryphocycloides depressus Billings 1858
†Polytryphocycloides grandis Smith and Paul 1982
†Polytryphocycloides huronensis Billings 1865
†Polytryphocycloides lindstroemi Regnell 1945