Echioceratidae

== Translingual == === Etymology === Echioceras +‎ -idae === Proper noun === †Echioceratidae A taxonomic family within the order Ammonitida – ammonites with serpenticone shells with keel, that lived in the Sinemurian stage of the Jurassic. === References === Echioceratidae on Wikipedia.Wikipedia Psiloceratoidea on Wikispecies.Wikispecies Category:Psiloceratoidea on Wikimedia Commons.Wikimedia Commons “Echioceratidae”, in Paleobiology Database, 2026