From the album: Camille's fossils - Georgian Bay Formation
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Orthocerida
Family: Proteoceratidae
Genus: Treptoceras
Species: T. crebriseptum
Author Citation: Hall (1847) [then known as Actinoceras crebriseptum]
Eon: Phanerozoic
Era: Paleozoic
Period: Ordovician
Sub Period: None
Epoch: Late
Georgian Bay Formation
Mimico Creek
Toronto
Ontario, Canada
Field collection by Camille Martin on 09/14/2021
Comments:
Sephuncle segment compression ratio (SCR) = 1.0 EQUIAXIAL
T. crebriseptum is a species of Treptoceras found in the Georgian Bay Formation at Toronto.
See Robert C. Frey, "Middle and Upper Ordovician Nautiloid Cephalopods of the Cincinnati Arch Region of Kentucky, Indina, and Ohio" (1995) 25-26, 45.