20313 - Cut & Polished 2.53 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Weltonia Enchodus subaequilateralis

Enchodus subaequilateralis

They were obligate encrusters and attached themselves to inorganic or biologic hard substrates (frequently hardgrounds or brachiopods)

It is exceptionally perfect

it is known that both the Abelisauridae and the Dromaeosauridae are present there

which is usually the only thing that is preserved

20313 - Cut & Polished 2.53 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Weltonia Enchodus subaequilateralisCleoniceras sp, Parona and Bonarelli 1897 (ammonite) Cephalopoda Ammonitida Cleoniceratidae Cleoniceras is a rather involute, high whorled hoplitid from the Lower to basal Middle Albian of Europe, Madagascar, and Transcaspian region. The shell has a generally small umbilicus, arched to acute venter, and typically at some growth stage, falcoid ribs that spring in pairs from umbilical tubercles, usually disappearing on the outer whorls. These ammonites