Tropaeum

For the ancient Greek or Roman victory monument, see Tropaion. For the city in Scythia Minor, see Civitas Tropaensium.

Tropaeum 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.

Tropaeum Temporal range: Early Cretaceous
Tropaeum imperator
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Suborder:	†Ancyloceratina
Family:	†Ancyloceratidae
Genus:	†Tropaeum Sowerby, 1837
Species
T. imperator T. undatum T. bowerbanki T. rasgradensis T. australis T. loegteri

The name "Tropaeum" was applied by paleontologist James De Carle Sowerby, in 1837.