Gastropods from North America

See images from the:

		Quaternary
		Tertiary
		Cretaceous
		Jurassic
		Triassic
		Permian
		Carboniferous
		Devonian
		Silurian
		Ordovician
		Cambrian
		Precambrian

Ecphora quadricostata
From the Tertiary in Florida
© 2000 Harley Means

Salpinogostoma and Calymene callicephala
From the Ordovician in Ohio
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Platyceras
From the Silurian in Indiana
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Worthenia sp.
From the Carboniferous in Texas
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Valvata scabrida
From the Jurassic in Colorado
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Goniobasis chrysalis
From the Cretaceous in Wyoming
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Turitella sp.
From the Tertiary in Idaho
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Turritella andersoni
From the Tertiary in California
© 2004 UCMP

Bellerophon hilli
From the Permian in California
© 2004 UCMP