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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]
 | This article relies largely or entirely on a single source. (October 2017) |
| Pinnocaris Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | †Rostroconchia |
| Order: | †Ribeirioida |
| Genus: | †Pinnocaris Etheridge, 1878 |
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