1.12" Iridescent Sublunduloceras Ammonite Fossil - Russia

This is a beautifully preserved Sublunduloceras lonsdalli ammonite from the Mikhailov quarry in the Ryazan region of Russia. It's Upper Jurassic (Middle Callovian Stage) in age, or approximately 161-164 million years old. You can feel that it's internally pyritized due to it's density and it has a naturally iridescent shell.

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
Sublunduloceras lonsdalli
LOCATION
Mikhailov quarry, Ryazan region, Russia
SIZE
1.12" wide
CATEGORY
SUB CATEGORY
ITEM
#34601
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