20868 - Nice Agatized & Polished 3.96 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar Mosasaur pathologically deformed finding the structure of the

finding the structure of the jaw with teeth in its natural position is extremely rare

Either way it is a very interesting specimen

They were extracted during the construction of a highway near Ben Slimane

Next you can find a link to the scientific paper: Zarafasaura Oceanis

about 515-520 Ma ago) of Laurentia and are among the oldest known fossils of echinoderms

20868 - Nice Agatized & Polished 3.96 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar Mosasaur pathologically deformed finding the structure of theCleoniceras 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