Superfamily †Helcionelloidea | Order †Helcionelliformes Rank Genus | |
Protowenella is a genus of helcionellid from the Middle Cambrian of Australia. It has a strongly spiralled, smooth shell with concentric ridges that have low relief. Other than its tighter coiling, it is very similar to Tichkaella.
References
Protowenella Wikipedia(Text) CC BY-SA