22134 - Cut & Polished 5.50 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Nileus See also Antunes 1964

See also Antunes 1964

The formula of the admixture of the three most common endmembers is written as Ca10(PO4)6(OH

history: Meteoritical Bulletin:   MB 90   (2006)   L4-6 MB 102   (2013)   L3-6 Recommended:   L3-6    [explanation]

These specimens are preserved as internal molds

22134 - Cut & Polished 5.50 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Nileus See also Antunes 1964Cleoniceras 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