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First report of a concavicarid interior (Crustacea : Thylacocephala) from the Devonian of North America


, : First report of a concavicarid interior (Crustacea : Thylacocephala) from the Devonian of North America. Northeastern Geology and Environmental Sciences 29(2): 102-106

The first Devonian concavicarid specimen from North America with internal structures preserved is described and referred to Concavicaris? sp. indet. Preserved morphology closely resembles contemporaneous concavicarids previously described from the Gogo Formation of western Australia (Briggs and Rolfe 1983). This new description of interior abdominal structures augments morphological data from previous collections of isolated concavicarid carapaces from contemporaneous strata in North America. This specimen was collected from the tidal to estuarine deposits of the Oneonta Formation of New York State, USA and may also represent the oldest thylacocephalan fossil recorded from brackish water deposits.

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