Windmill Point: Tortonian, Maryland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Carnivora
- Phocidae
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Magnotherium johnsii n. gen., n. sp.
Rahmat et al. 2021
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1 specimen | |||||||||
| CMM-V-5350 | ||||||||||
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Homiphoca sp.
Muizon and Hendey 1980
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Hafed et al. 2024 | 1 specimen | ||||||||
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Reptilia
- Testudines
- Dermochelyidae
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Psephophorus polygonus
von Meyer 1847
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Weems 2023 | 2 specimens | ||||||||
| Dermal shield ossicles (CMM-V-5133), one with broad and rounded keel, collected by John R. Nance and Walt Johns. Juvenile femur (USNM 433264), collected by S. F. Blake | ||||||||||
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Reptilia
- Testudines
- Cheloniidae
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Trachyaspis lardyi
Meyer 1873
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Weems 2023 | 1 specimen | ||||||||
| Ninth right peripheral (CMM-V-2978), collected by Stephen J. Godfrey | ||||||||||
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Reptilia
- Testudines
- Trionychidae
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Apalone cf. ferox
(Schneider 1783)
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Weems 2023 | 2 specimens | ||||||||
| recombined as Platypeltis ferox | ||||||||||
| Fragment of anterior central region of left hyoplastron (CMM-V-3696), Proximal end of right hyoplastron (CMM-V-8752), collected by John R. Nance | ||||||||||
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Reptilia
- Testudines
- Emydidae
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"Deirochelys" carri
Jackson 1978
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Weems 2023 | 1 specimen | ||||||||
| Proximal portion of third left costal (CMM-V-8755), found by Donald J. Morgan III | ||||||||||
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Pseudemys caelata
Hay 1908
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Weems 2023 | 1 specimen | ||||||||
| Right hyoplastron (HSMC 2017-1), found by Donna Richardson | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Maryland | County: | St Marys |
| Coordinates: | 38.2° North, 76.5° West (view map) | ||||
| Paleocoordinates: | 38.3° North, 74.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
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: | Chesapeake | Formation: | St Marys | Member: | Windmill Point |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | not reported |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Calvert Marine Museum
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Metadata
| Database number: | 221449 | ||
| Authorizer: | M. Uhen, E. Vlachos | Enterer: | M. Uhen, E. Vlachos | Research group: | vertebrate |
| Created: | 2021-08-06 09:53:30 | Last modified: | 2021-08-06 09:53:30 |
| Access level: | the public | Released: | 2021-08-06 09:53:30 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 77553. | S. Rahmat, A. B. Hafed, S. J. Godfrey, J. R. Nance, and I. A. Koretsky. 2021. A new unusual Monachinae from the Neogene of the Atlantic Coastal Plain (Maryland, USA). Historical Biology [M. Uhen/M. Uhen] |
Secondary references:
| 68442 | A. B. Hafed, I. A. Kortetzky, J. R. Nance, L. Koper, and S. J. Rahmat. 2024. New Neogene fossil phocid postcranial material from the Atlantic (USA). Historical Biology 25:1-247 [S. Devincenzi/S. Devincenzi/M. Uhen] | |
| 85705 | R. E. Weems. 2023. Miocene and Pliocene Chelonians from the Calvert Cliffs and Nearby Regions. In S. J. Godfrey (ed.), The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA – Volume 2 Turtles and Toothed Whales 3-48 [E. Vlachos/E. Vlachos] |