Ribeiria

Ribeiria Temporal range: Mid Cambrian–Silurian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	†Rostroconchia
Order:	†Ribeirioida
Genus:	†Ribeiria Sharpe, 1853
Species
R. junior Runnegar, 1996

Ribeiria is a genus of rostroconch mollusc with a pegma, once interpreted as an intermediate between helcionellids (such as Anabarella and Latouchella) and primitive scaphopods (such as Pinnocaris).^[2]