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Temporal range: Cret L & M Albian
Cleoniceras besairiei Collignon Alb inf Madagascar.JPG
Cleoniceras besairiei, Madagascar
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Hoplitaceae
Family: Hoplitidae
Genus: Cleoniceras
Parona & Bonnarelli 1895

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.

Cleoniceras is included in the subfamily Cleoniceratinae.


This genus contains the species C. cleon and C. besairiei.


  • Treatise on Invertebrate Paleontology, Part L (Ammonoidea). R.C. Moore (ed). Geological Soc of America and Univ. Kansas Press (1957), p L394