Biostratigraphy of vertebrate footprints in the Late Triassic section of the Newark basin, Pennsylvania: reassessmant of stratigraphic ranges
Abstract--The discovery of the youngest Brachychirotherium, the youngest Gwynneddichnium and two new ichnotaxa, as well as documentation of other known ichnofauna from the youngest continuous stratigraphic section in the Jacksonwald syncline necessitate redefinition of previous vertebrate stratigraphic ranges and vertebrate diversity for the last seven million years of the Late Triassic (including the Rhaetian of some workers). This period has thus far been poorly prospected worldwide (Olsen and Sues, 1986). These new ichnological finds help reconstruct faunal diversity and turnover near the Triassic-Jurasic boundary.

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