The Paleontology of North America
Introduction
Time and Space
Fossil Gallery
Other Molluscs from North America
See images from the:
Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian
Tentaculites
From the Devonian in West Virginia
© 2003 Thomas Kammer
Shelbyoceras robustum
From the Cambrian in Missouri
© 2005 Nicholas Angeli