Severn Formation Locality B (Landover): Maastrichtian, Maryland
collected by D. J. Bohaska, L. Decina, G. C. Fonger, E. F. Hartstein, P. M. Kranz, & E. M. Lauginiger
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
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Peritresius ornatus
(Leidy 1856)
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3 specimens | |||||||||
| USNM 336479, 336470, 336474 | ||||||||||
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Reptilia
- Testudines
- Toxochelyidae
|
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Toxochelyidae indet.
Baur 1895
|
1 specimen | |||||||||
| USNM 336471; "possibly Peritresius" | ||||||||||
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Reptilia
- Testudines
|
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cf. Trionyx priscus
Cope 1869
|
2 specimens | |||||||||
| nomen dubium belonging to Pantrionychidae | ||||||||||
| USNM 387367, 336475 | ||||||||||
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Osteopygis emarginatus
Cope 1868
|
1 specimen | |||||||||
| USNM 336472 | ||||||||||
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Reptilia
- Mosasauridae
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Mosasauridae indet.
Gervais 1852
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5 specimens | |||||||||
| USNM 336473; Lauginiger coll. | ||||||||||
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Halisaurus platyspondylus
(Marsh 1869)
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1 specimen | |||||||||
| USNM 336476 | ||||||||||
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cf. Mosasaurus conodon
(Cope 1881)
|
2 specimens | |||||||||
| USNM 336480, 336473 | ||||||||||
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Mosasaurus maximus
Cope 1869
|
1 specimen | |||||||||
| synonym of Mosasaurus hoffmannii | ||||||||||
| Hartstein coll., tooth | ||||||||||
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Prognathodon rapax
(Hay 1902)
|
1 specimen | |||||||||
| USNM 336477 | ||||||||||
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Reptilia
|
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Thoracosaurus neocesariensis
(De Kay 1842)
|
4 specimens | |||||||||
| USNM 336478, 387368; Foniger coll. | ||||||||||
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Reptilia
- Plesiosauria
- Elasmosauridae
|
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cf. Cimoliasaurus magnus
(Leidy 1851)
|
1 specimen | |||||||||
| original and current combination Cimoliosaurus magnus | ||||||||||
| Decina coll, cast PU 23625 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Maryland | County: | Prince George's |
| Coordinates: | 38.9° North, 76.8° West (view map) | ||||
| Paleocoordinates: | 39.8° North, 52.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
| *International age/stage: | Middle Maastrichtian | ||
| Key time interval: | Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Severn |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | not reported |
| Lithology description: none given | |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collectors: | D. J. Bohaska, L. Decina, G. C. Fonger, E. F. Hartstein, P. M. Kranz, & E. M. Lauginiger |
Metadata
| Also known as: | McCormick, Inglewood | ||
| Database number: | 27563 | ||
| Authorizer: | J. Alroy, M. Carrano | Enterer: | J. Alroy, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-12-11 15:08:01 | Last modified: | 2015-04-01 15:56:05 |
| Access level: | the public | Released: | 2002-12-11 15:08:01 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 773. | D. Baird. 1986. Upper Cretaceous reptiles from the Severn Formation of Maryland. The Mosasaur 3:63-85 [J. Alroy/M. Sommers/M. Uhen] |
Secondary references:
| 54671 | W. B. Gallagher. 1993. The Cretaceous/Tertiary mass extinction event in the North Atlantic coastal plain. The Mosasaur 5:75-154 [M. Carrano/M. Carrano] |