Protocycloceras abnorme (FOSSIL) Ulrich & al., 1944 †
Protocycloceras arkansasense (FOSSIL) Ulrich & al., 1944 †
Protocycloceras becki (FOSSIL) (Billings, 1859 †)
Ectocycloceras cataline (FOSSIL) (Billings, 1865 †)
Ectocycloceras cato (FOSSIL) (Billings, 1865 †)
Protocycloceras catulus (FOSSIL) (Billings, 1865 †)
Protocycloceras chikunense (FOSSIL) T. Kobayashi, 1927 †
Catoraphiceras colon (FOSSIL) (White, 1874 †)
Catoraphiceras cushingi (FOSSIL) Ulrich & al., 1944 †
Protocycloceras deprati (FOSSIL) Reed, 1928 †
Protocycloceras doniphonense (FOSSIL) Ulrich & al., 1944 †
Catoraphiceras foerstei (FOSSIL) (Butts, 1926 †)
Protocycloceras furtivum (FOSSIL) (Billings, 1865 †)
Protocycloceras gangshanense (FOSSIL) Zou, 1988 †
Protocycloceras geronticum (FOSSIL) Ulrich & al., 1944 †
Endocycloceras gracile (FOSSIL) Flower, 1964 †
Catoraphiceras ibexense (FOSSIL) Hook & Flower, 1977 †
Kyminoceras kottlowskii (FOSSIL) Hook & Flower, 1977 †
Protocycloceras lamarcki (FOSSIL) (Billings, 1856 †)
Protocycloceras laswelli (FOSSIL) Hook & Flower, 1977 †
Endocycloceras legorense (FOSSIL) Ulrich & al., 1944 †
Protocycloceras levisense (FOSSIL) Ulrich & al., 1944 †
Catoraphiceras lobatum (FOSSIL) Ulrich & Foerste, 1936 †
Protocycloceras manitouense (FOSSIL) Ulrich & al., 1944 †
Protocycloceras mendax (FOSSIL) (Salter & Murchison,1859 †)
Protocycloceras odenvillense (FOSSIL) Ulrich & al., 1944 †
Protocycloceras ordinatum (FOSSIL) (Billings, 1865 †)
Catoraphiceras osagense (FOSSIL) Ulrich & al., 1944 †
Catoraphiceras pearsonae (FOSSIL) Hook & Flower, 1977 †
Endocycloceras perannulatum (FOSSIL) Ulrich & al., 1944 †
Protocycloceras philipsburgense (FOSSIL) Ulrich & al., 1944 †
Catoraphiceras resseri (FOSSIL) Ulrich & al., 1944 †
Protocycloceras rushense (FOSSIL) (McChesney, 1859 †)
Catoraphiceras sinuatum (FOSSIL) Hook & Flower, 1977 †
Protocycloceras smithvillense (FOSSIL) Ulrich & al., 1944 †