Temporal range: Ordovician
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Rostroconchia
Order: Ribeirioida
Genus: Pinnocaris
Etheridge, 1878
Further information: Tusk_shell § Fossil_record

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]


  1. 1 2 3 Peel, J.S. (2004). "Pinnocaris and the origin of scaphopods.". Acta Palaeontologica Polonica. 49 (4): 543–550.
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