22133 - Cut & Polished 4.85 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Edmontosaurus Donald (1986): Halisaurus and Prognathodon

Donald (1986): Halisaurus and Prognathodon

Native copper occurs rarely as isometric cubic and octahedral crystals

and therefore it is more valued

with remarks on African Caudata" Tannina Alloul et al

Source: Alethopteris: Fossilworks - Paleobiology Database

22133 - Cut & Polished 4.85 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Edmontosaurus Donald (1986): Halisaurus and PrognathodonCleoniceras 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