Pinnocaris

Pinnocaris is a genus of rostroconch mollusc known from the Cambro-Ordovician.[1] It was once considered as a possible ancestor to the scaphopods, but this no longer seems tenable.[1] Original descriptions from material in southern Scotland had the organism as a bivalved arthropod, but its univalved disposition has since become clear.[1]

Pinnocaris
Temporal range: Ordovician
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: †Rostroconchia
Order: †Ribeirioida
Genus: †Pinnocaris
Etheridge, 1878

References
  1. Peel, J.S. (2004). "Pinnocaris and the origin of scaphopods". Acta Palaeontologica Polonica. 49 (4): 543–550.


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