Protowenella

Protowenella is a genus of hyolith from the Middle Cambrian of Australia and Greenland, previously thought to be a helcionelloid.^[1] It has a strongly spiralled, smooth shell with concentric ridges that have low relief. Other than its tighter coiling, it closely resembles Tichkaella.^[2]

Protowenella Temporal range: Mid Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Class:	†Hyolitha
Order:	†Orthothecida
Genus:	†Protowenella