ecofactbook
/
species
/
Animalia
/
Mollusca
/
Cephalopoda
/
Ammonoidea
/
Trachyceratidae
/
Eoprotrachyceras
/
Eoprotrachyceras americanum
Eoprotrachyceras dunni
Eoprotrachyceras lahontanum
Eoprotrachyceras meeki
Eoprotrachyceras subasperum
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