Paleocene chimaeroid fishes (Chondrichthyes: Holocephali) from the eastern United States, including two new species of Callorhinchus
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Paleocene chimaeroid fishes (Chondrichthyes: Holocephali) from the eastern United States, including two new species of Callorhinchus

  • Author(s): Cicimurri, David J.
  • Ebersole, Jun A.
  • et al.
Abstract

Isolated tooth plates collected from Paleocene deposits of Alabama, Arkansas, Illinois, Maryland, Mississippi, New Jersey, South Carolina, Texas, and Virginia represent four genera of chimaeroid fishes. Callorhinchus is reported in the fossil record of North America for the first time and is represented by material from the Danian (early Paleocene) of Mississippi and the Thanetian (late Paleocene) of Maryland and Virginia. Specimens from both locations are identified as new species, the Danian C. phillipsi n. sp. and the Thanetian C. alfordi n. sp. New Paleocene Elasmodus records from North America include two partial mandibulars belonging to E. hunteri from the Thanetian of Maryland, and a nearly complete mandibular from the Danian of New Jersey, tentatively assigned to cf. Elasmodus sp. Two species of Ischyodus are recognized, I. dolloi (Danian and Thanetian) and I. williamsae (Danian), but the two species have not been found in the same lithostratigraphic deposits. Edaphodon mirificus is known from the Danian of New Jersey and Mississippi, and the genus also occurs in the Thanetian of Virginia.

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