Tropaeum
Appearance
Tropaeum Temporal range: Early Cretaceous
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Tropaeum imperator | |
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Genus: | Tropaeum Sowerby, 1837
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Tropaeum ("Trophy") is an extinct genus of ammonites found throughout the oceans of the world during the Early Cretaceous. As with many other members of the family Ancyloceratidae, there was a trend among species within this genus to uncoil somewhat, in a very similar manner to the genus Lytoceras. The largest species, T. imperator of Australia, had a shell a little over one meter in diameter.