Phoenixville Tunnel: Norian, Pennsylvania

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Mastodonsaurus durus n. sp. Cope 1866
1 specimen
nomen dubium belonging to Metoposauridae
AMNH 3927, fragment of skull roof
see common names

Country:United States State/province:Pennsylvania County:Chester
Coordinates: 40.1° North, 75.5° West (view map)
Paleocoordinates:14.6° North, 20.4° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Period:Triassic Epoch:Late/Upper Triassic
Stage:Norian 10 m.y. bin:Triassic 4
Key time interval:Norian
Age range of interval:228.00000 - 208.50000 m.y. ago
Geological group:Chatham Formation:Lockatong
Stratigraphic resolution:group of beds
Stratigraphy comments: From the Lower Lockatong Formation according to Olsen (1988). Two fossiliferous beds, about 500 ft apart.
Lithology and environment
Primary lithology: "shale"
Includes fossils?Y
Environment:terrestrial indet.
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:salvage,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:AMNH
Database number:107421
Authorizer:R. Butler Enterer:R. Butler
Modifier:M. Carrano Research group:vertebrate
Created:2011-04-07 22:16:28 Last modified:2014-10-20 16:47:24
Access level:the public Released:2011-04-07 22:16:28
Creative Commons license:CC BY
Reference information

Primary reference:

15618.ETE E. D. Cope. 1866. [A few observations on some of the extinct vertebrates of the Mesozoic Red Sandstone]. Proceedings of the Academy of Natural Sciences of Philadelphia 18:249-250 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

31017 D. Baird. 1986. Some Upper Triassic reptiles, footprints and an amphibian from New Jersey. The Mosasaur 3:125-153 [R. Butler/R. Butler/M. Carrano]
35756 E. H. Colbert and J. Imbrie. 1956. Triassic metoposaurid amphibians. Bulletin of the American Museum of Natural History 110:399-452 [R. Butler/R. Butler]
53039 B. S. Lyman. 1895. Report on the New Red in Bucks and Montgomery counties. Pennsylvania State Geological Summary Final Report 3(2):2589-2638 [M. Carrano/M. Carrano]