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Rare, 1.5" Spathacalymene Trilobite - Indiana
This is an 1.5" long specimen of a rare Silurian trilobite from the Osgood Formation in Indiana, Spathacalymene nasuta. This trilobite has a distinctive snout projection off the front of the glabella that may have been used to stir up sediment for feeding. These trilobites are very hard to find complete. This one was found ventrally on the surface of the rock, flipped over and remounted.
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.
SPECIES
Spathacalymene nasuta
AGE
LOCATION
Ripley County, Indiana
FORMATION
Osgood Formation
SIZE
1.5" long
CATEGORY
SUB CATEGORY
ITEM
#162112
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