Amphibians and Nonmarine Turtles from the Miocene Calvert Formation of Delaware, Maryland, and Virginia (USA)

  title={Amphibians and Nonmarine Turtles from the Miocene Calvert Formation of Delaware, Maryland, and Virginia (USA)},
  author={Robert E. Weems and Reed A. George},
  booktitle={Journal of Paleontology},
Abstract Two amphibian taxa are reported for the first time from the lower to middle Miocene shallow-marine Calvert Formation. These are Batrachosauroides aff. B. dissimulans (a large proteoid salamander) and cf. Notophthalmus robustus (a small newt). Four kinds of identifiable nonmarine turtles were reported previously from this formation. These are Bairdemys miocenica (a pleurodire), Kinosternon sp. (a musk turtle), Hesperotestudo ducateli and Hesperotestudo wilsoni (tortoises). Four… 
New mud turtles (Kinosternidae, Kinosternon) from the middle—late Miocene of the United States
Abstract. Kinosternon Spix, 1824, was widespread in xeric to savanna associated paleowetlands across North America during the middle—late Miocene and steadily diversified following its first
A Review of the Fossil Record of Turtles of the Clade Pan-Kinosternoidea
Turtles of the total clade Pan-Kinosternoidea have a relatively poor fossil record that extends back to the Late Cretaceous, and a taxonomic review of the group concludes that of 42 named taxa, 27 are nomina valida, including two species of the controversial taxon Planetochelys.
New finds of remarkable coprolites (fossilized feces) are here reported from the famous Miocene marine sediments of the Chesapeake Group exposed along Calvert Cliffs (Maryland, U.S.A.). Although
Fossil Musk Turtles (Kinosternidae, Sternotherus) from the Late Miocene—Early Pliocene (Hemphillian) of Tennessee and Florida
Sternotherus was diverse and moderately well distributed geographically by its first known fossil occurrences and support previous hypotheses that the Sternotherus minor complex evolved in the Gulf coastal plain and dispersed throughout that region since at least the latest Miocene-earliest Pliocene.
A Borophagine canid (Carnivora: Canidae: Borophaginae) from the middle Miocene Chesapeake Group of eastern North America
Abstract. A tooth recovered from the middle Miocene Choptank Formation (Chesapeake Group) of Maryland is identified as a new cynarctin borophagine (Canidae: Borophaginae: Cynarctina), here called
The geologically youngest remains of Trachyaspis lardyi Meyer, 1843 (Testudines, Cheloniidae): a new specimen from the late Pliocene of the Stirone River (Northern Italy)
A new specimen of the marine turtle Trachyaspis lardyi Meyer, 1843 collected from Piacenzian sediments cropping out in the bed of the Stirone River (Northern Italy) is herein described. The
The Lapara Creek Fauna: Early Clarendonian of south Texas, USA
  • S. May
  • Environmental Science, Geology
    Palaeontologia Electronica
  • 2019
The Lapara Creek Fauna includes a large collection of fossil vertebrates obtained by the State-Wide Paleontologic-Mineralogic Survey in Texas (1939–1941) under the direction of the Bureau of Economic
A new slider turtle (Testudines: Emydidae: Deirochelyinae: Trachemys) from the late Hemphillian (late Miocene/early Pliocene) of eastern Tennessee and the evolution of the deirochelyines
The new taxon, Trachemys haugrudi, is described, and currently represents the most thoroughly described fossil emydid species known, and a phylogenetic analysis is performed that includes the new fossil species, along with numerous other modern and fossil deirochelyine species, representing the first phylogenetics analysis published that includes several fossil deIROchelyines.
A Review of the Fossil Record of New World Turtles of the Clade Pan-Trionychidae
Turtles of the clade Pan-Trionychidae have a rich, but fragmentary fossil record in the New World, ranging from the Late Cretaceous to the Holocene, but the placement of most fossil taxa remains poorly resolved relative to these two primary clades.
Miocene stratigraphy and paleoenvironments of the Calvert Cliffs, Maryland
Miocene strata exposed in the Calvert Cliffs, along the western shore of the Chesapeake Bay, Maryland, have a long history of study owing to their rich fossil record, including a series of


A recently discovered vertebrate fossil-bearing locality in the Fleming Formation of easternmost Texas has revealed a highly diverse fauna that contains a minimum of 44 early Miocene vertebrate taxa, document the rare preservation of a forested subtropical to tropical coastal lowland paleoenvironment and provide evidence to imply that separation into mid-continent and coastal plain paleobiogeographic provinces had not yet occurred.
New early Barstovian (middle Miocene) vertebrates from the upper Torreya Formation, eastern Florida panhandle
  • J. Bryant
  • Environmental Science, Geography
  • 1991
The WCF is the first well documented early Barstovian fauna in the southeastern U.S., thus filling a large gap in the temporal distribution of vertebrate taxa, from marine, freshwater, and terrestrial environments.
A New Species of Bairdemys (Pelomedusoides: Podocnemididae) from the Oligocene (Early Chattian) Chandler Bridge Formation of South Carolina, USA, and Its Paleobiogeographic Implications for the Genus
In the Oligocene and Miocene, North and South America were separated by broad expanses of salt water, so Bairdemys probably was salt-water tolerant and reached North America by “island hopping” from South America across the Caribbean Sea.
Fossil sea turtles (Chelonii, Dermochelyidae and Cheloniidae) from the Miocene of Pietra Leccese (late Burdigalian-early Messinian), Southern Italy
The presence of chelonian remains in the Miocene Pietra Leccese sediments (Lecce, Italy) is known since the 19th century. Two chelonian species have been recognized: Testudo varicosa Costa, 1851, and
Late Pleistocene Cold-Blooded Vertebrate Faunas from the Mid-Continental United States. I. Reptilia; Testudines, Crocodilia. Claude W. Hibbard Memorial Volume VI
Local faunas containing fossils of turtles and alligators and located principally in the Great Plains and Central Lowlands physiographic provinces (Ferneman, 1931) are reviewed. A temporal sequence
A New Species of Emydoidea (Reptilia: Testudines) from the Late Barstovian (Medial Miocene) of Cherry County, Nebraska
A new species, Emydoidea hutchisoni, of the heretofore monotypic genus Emy doidea is described from the Late Barstovian Land Mammal Age (Medial Miocene) of the West Valentine Quarry, Cherry County, north-central Nebraska.
Paleocene turtle remains from South Carolina
THE TURTLE FAUNA FROM the Williamsburg Formation of the Paleocene of South Carolina is the most diverse yet known from the Paleocene of eastern North America, although this may reflect the mixed
Hesperotestudo (Testudines: Testudinidae) from the Pleistocene of Bermuda, with comments on the phylogenetic position of the genus
A review of the phylogenetic relationships of the better known genera of the Testudinidae suggests that the affinities of Hesperotestudo lie with other North American tortoises ( Gopherus ) and not with Geochelone or other testudinines; thus, HesperOTestudo is reassigned to the Xerobatinae.
Morphology and Evolution of Turtles
The unquestioned unity of the Chelonia provides a necessary basis for establishing their interrelationships and determining the evolutionary history within the group, and recent studies of the genetic and molecular aspects of the development of the carapace and plastron imply unique patterns of evolutionary change that cannot be recognized in any of the other amniote lineages.
The Miocene Climatic Optimum: evidence from ectothermic vertebrates of Central Europe
  • M. Böhme
  • Geography, Environmental Science
  • 2003