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Parent taxon: Acastidae according to B
Either way it is a very interesting specimen
about 515-520 Ma ago) of Laurentia and are among the oldest known fossils of echinoderms
vanadinite crystals from Midelt
20868 - Nice Agatized & Polished 3.96 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar Mosasaur pathologically deformed Parent taxon: Acastidae according toCleoniceras 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
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