Kingdom Animalia Class Cephalopoda Order Discosorida Rank Genus | Phylum Mollusca Subclass Nautiloidea Family Westonoceratidae | |
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Clarkesvillia is a genus of Upper Ordovician westonocerids the differs from Faberoceras in having a more flattened venter and from the later Glyptodendron in having a more ventrally located siphuncle.
References
Clarkesvillia Wikipedia(Text) CC BY-SA