2.3" Cretaceous Fossil Ammonite (Calycoceras) - Texas

This is a 2.3" fossil ammonite (Calycoceras tarrantense) from Dallas County, Texas.

Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. Ammonites appeared in the fossil record about 240 million years. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

DETAILS
SPECIES
Calycoceras tarrantense
LOCATION
Dallas County, Texas
FORMATION
Woodbine Group
SIZE
2.3" wide
CATEGORY
ITEM
#162641
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