Severn Formation Locality C (Hampton Mall Shopping Center): Maastrichtian, Maryland
collected by G. C. Fonger, R. Johnson, T. A. Miller, & M. Smigaj

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Ornithomimus antiquus (Leidy 1865)
1 specimen
nomen dubium belonging to Ornithomimosauria
Miller coll.
Thoracosaurus neocesariensis (De Kay 1842)
Reptilia - Testudines
cf. Trionyx priscus Cope 1869
1 specimen
nomen dubium belonging to Pantrionychidae
Smigaj coll.
Peritresius ornatus (Leidy 1856)
4 specimens
Miller, Fonger & Smigaj collns., MAPS A1203a
cf. Osteopygis emarginatus Cope 1868
1 specimen
Miller coll.
Reptilia - Mosasauridae
Mosasauridae indet. Gervais 1852
1 specimen
caudal
Halisaurus platyspondylus (Marsh 1869)
1 specimen
Smigaj coll., cast PU 23627
cf. Mosasaurus dekayi Bronn 1838
1 specimen
MAPS A1229a
Mosasaurus maximus Cope 1869
1 specimen
synonym of Mosasaurus hoffmannii
MAPS A1202c
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 - Late/Upper 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:G. C. Fonger, R. Johnson, T. A. Miller, & M. Smigaj
Metadata
Also known as:Loc. 3a of Brouwers and Hazel
Database number:27564
Authorizer:J. Alroy, M. Carrano Enterer:J. Alroy, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2002-12-11 15:26:58 Last modified:2008-08-18 11:28:40
Access level:the public Released:2002-12-11 15:26:58
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:

18120 J. Alroy. 2006. Synonymies and reidentifications of North American fossil vertebrates. [J. Alroy/J. Alroy/J. Alroy]