First Cretaceous Specimens of the Beryciform Fish Hoplopteryx from North America and their Bearing on Acanthopterygian Evolution
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Hoplopteryx lewesiensis (Beryciformes: Trachichthyidae) is reported from North America for the first time. More than a dozen individuals, including several complete fishes, expand the geographic range of this Late Cretaceous fish. This acanthopterygian, characterized by an unchanging morphology across a long geologic interval and broad geographic area, indicates that the epeiric seas of the northern seaway were relatively homogeneous environments. It appears also that the beryciforms as well as the perciforms developed outside of these seas.
Contents: Abstract -- Introductions -- Abbreviations -- Acknowledgments -- Geology and Paleoecology -- Systematic Paleontology -- Discussion -- Upper Creataceous Acanthopterygans -- Literature Cited