Two Fossil Ammonites (Promicroceras) - Lyme Regis

This is 2 very beautifully agatized, Promicroceras planicosta ammonite fossils, collected from Lyme Regis, England. They are almost translucent and have been nicely prepared to display very well on the limestone slab.

Comes with an acrylic stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Promicroceras planicosta
LOCATION
Lyme Regis, Dorset, England
FORMATION
Lower Lias, Obtusum Zone
SIZE
.8" larger , .6" smaller, 5.5 x 4.5" rock
ITEM
#110686
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