Английская Википедия:Clarkesvillia
Материал из Онлайн справочника
Clarkesvillia is a genus of Upper Ordovician westonocerids that differs from Faberoceras in having a more flattened venter and from the later Glyptodendron in having a more ventrally located siphuncle.
References
- Teichert, C. 1964. Nautiloidea -Discosorida. Treatise on Invertebrate Paleontology Part K Teichert and Moore, eds.
- Clarkesvillia-Paleobiology DB