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]

References

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


Allikas: Https://en.wikipedia.org/wiki/Pinnocaris
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