Kingdom Animalia Class †Helcionelloida Superfamily †Helcionelloidea | Phylum Mollusca Order †Helcionelliformes Rank Genus | |
Oelandia is an extinct genus of basal molluscs of the family helcionellid from the Middle Cambrian of Sweden, China and North America. It has a small, upwards-pointing anterior snorkel with a closed end. It bears pronounced concentric ribbing around its strongly coiled exogastric shell.
References
Oelandia Wikipedia(Text) CC BY-SA