20871 - Cut & Polished 2.57 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Spinosaurus This piece has a very

This piece has a very special position within our dinosaur bones collection

REFERENCES

Homalonotidae is a family of trilobites that lived from the Ordovician to the Devonian

a straight mesial margin and a curved lingual margin

20871 - Cut & Polished 2.57 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Spinosaurus This piece has a veryCleoniceras 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