Agatized Ammonite (Promicroceras) Fossils - Lyme Regis

These are two very beautiful Promicroceras planicosta ammonite fossils which have been agatized, collected from the Lyme Regis region of England. They're almost translucent and have been nicely prepared so that they display very well on the limestone slab. Comes with an acrylic display stand.

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 ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

Promicroceras planicosta
Lyme Regis, Dorset, England
Lower Lias, Obtusum Zone
Largest Ammonite .83" wide, Rock 4.9 x 3.3"
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