Oridorsalis ecuadorensis
(Galloway & Morrey, 1929)
type specimen   holotype
Paleogene
Northwestern South America

Oridorsalis plummerae
(Cushman, 1948)
identified by scientist   
Paleogene
North Africa

Oridorsalis praemegastomus
(Mjatliuk, 1953)
identified by scientist   
Cretaceous
North European Plain

Oridorsalis stellatus
(Silvestri, 1898)
identified by scientist   
Neogene
Mediterranean

Oridorsalis umbonatus
(Reuss, 1851)
identified by scientist   
Quaternary
Patagonia and off

Oridorsalis umbonatus
(Reuss, 1851)
identified by M. Hesemann   
Quaternary
Greenland Sea

Oridorsalis westi
Andersen, 1961
identified by scientist   
Quaternary
off Brazil