Amalgamated Phosphate Company Mine: Tortonian, Florida
collected by Anton Schneider

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Tomistoma americana n. sp. Sellards 1915
Sellards 1915
synonym of Thecachampsa sericodon
Florida State Geological Survey 3657 - type (anterior portion of skull); referred specimen - 2372 (fragment of lower jaw); "Miocene" specimens collected before 1921 by the Amalgamated Phosphate Company and reposited with the AMNH, FGS, USNM, and MCZ (1 measurement)
Reptilia - Testudines - Testudinidae
Testudo hayi n. sp. Sellards 1916
Sellards 1916
nomen dubium belonging to Testudinidae
USNM 8815 (holotype), carapacial and plastral fragments (Auffenberg 1963, fig. 20)
Mammalia - Cetacea - Platanistidae
Pomatodelphis inaequalis Allen 1921
see common names

Geography
Country:United States State/province:Florida County:Polk
Coordinates: 27.8° North, 82.0° West (view map)
Paleocoordinates:27.9° North, 80.1° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period:Neogene Epoch:Miocene
Stage:Tortonian 10 m.y. bin:Cenozoic 6
Key time interval:Tortonian
Age range of interval:11.63000 - 7.24600 m.y. ago
Stratigraphy
Geological group:Hawthorn Formation:Peace River Member:Bone Valley
Stratigraphic resolution:formation
Stratigraphy comments: Bradley fauna from Bone Valley Formation; lower beds

Missimer 1999: The Peace River Formation was deposited from about 11 to 4.3 Ma. It is separated from the underlying, middle Miocene Arcadia Formation by an unconformity with a hiatus of 2 to 4 m.y. The unconformity separating the shallow marine sequence (late Miocene) from the overlying deltaic sequence (early Pliocene) has a hiatal gap of 2 to 6 m.y. depending on geographic location.
Lithology and environment
Primary lithology:pebbly,phosphatic lithified argillaceous,sandy sandstone
Includes fossils?Y
Lithology description: Clastic rcok unit consisting primarily of pebble- to sand-sized phophate in a matrix of clay and quartz sand.
Environment:lagoonal
Geology comments: Bone Valley Formation environment consists of both lagoons and bays along the coast.
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Articulated whole bodies:none
Associated major elements:none
Disassociated major elements:many
Disassociated minor elements:some
Collection methods and comments
Collection methods:salvage,field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:FLMNH,MCZ
Collectors:Anton Schneider
Metadata
Database number:45452
Authorizer:M. Uhen, J. Alroy, E. Vlachos Enterer:N. Pyenson, J. Alroy, E. Vlachos
Modifier:G. Varnham Research group:vertebrate
Created:2004-10-24 10:20:45 Last modified:2022-04-28 04:53:42
Access level:the public Released:2004-10-24 10:20:45
Creative Commons license:CC BY
Reference information

Primary reference:
2613. G. S. Morgan. 1994. Miocene and Pliocene marine mammal faunas from the Bone Valley Formation of central Florida. Contributions in Marine Mammal Paleontology Honoring Frank C. Whitmore Jr., Proceedings of the San Diego Society of Natural History 29:239-268 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

25761 C. C. Mook. 1921. Skull characters and affinities of the extinct Florida gavial Gavialosuchus americana (Sellards). Bulletin of the American Museum of Natural History 44(5):33-41 [J. Alroy/J. Alroy/J. Alroy]
46386 E. H. Sellards. 1915. A new gavial from the Late Tertiary of Florida. The American Journal of Science, series 4 40:135-138 [P. Mannion/P. Mannion/M. Carrano]
64799 E. H. Sellards. 1916. A new tortoise and a supplementary note on the gavial, Tomistoma americana. American Journal of Science 42:235-240 [E. Vlachos/E. Vlachos]