| Severn Formation | |
|---|---|
Stratigraphic range: Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N | |
| Type | Geological formation |
The Severn Formation is a Mesozoic geologic formation in Maryland. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
Paleofauna
Dinosaurs
- "Coelosaurus" antiquus
- Ornithomimidae indet.
- Hadrosauridae indet.
Plesiosaurs
Mosasaurs
- Halisaurus platyspondylus
- Prognathodon rapax
- Mosasaurus hoffmanni
- Mosasaurus sp.
- cf. Mosasaurus conodon
- Mosasauridae indet.
Crocodylomorphs
Turtles
Chondrichthyans
- Carcharias holmdelensis
- Carcharias samhammeri
- Chiloscyllium greeni
- Cretalamana appendiculata
- Dasyatis sp.
- Tomewingia problematica
- Galeorhinus garadoti
- Ginglymostoma sp.
- Heterodontus sp.
- Hybodus sp.
- Ischyrhiza cf. avonicola
- Ischyrhiza mira
- Myliobatis sp.
- Odontaspis aculeatus
- Plicatoscyllium antiquum
- Plicatoscyllium derameei
- Pseudohypolophus mcnultyi
- Ptychotrygon vermiculata
- Raja farishi
- Rhinobatos sp.
- Rhombodus binkhorsti
- Serratolamna serrata
- Squalicorax kaupi
- Squalicorax pristodontus
- Squatina hassei
- Ischyodus sp.
Osteichthyans
- Albuidae indet.
- Anomoedus cf. haseolus
- Cylinadracanthus sp.
- Egertonia sp.
- Enchodus ferox
- Hadrodus sp.
- Lepidosteus sp.
- Paralbula casei
See also
Footnotes
- Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ Baird, Donald (1986). "Upper Cretaceous Reptiles from the Severn Formation of Maryland". The Mosasaur. 3: 63–85.
- ^ Hartstien, Eugene F; Decina, Lawrence E; Keil, Ronald F (1999). "A Late Cretaceous (Severn Formation) Vertebrate Assemblage from Bowie, Maryland". The Mosasaur. 6: 17–23.
- Holmes, Robert B.; Sues, Hans-Dieter (2000). "A Partial Skeleton of the Basal Mosasaur Halisaurus platyspondylus from the Severn Formation (Upper Cretaceous: Maastrichtian) of Maryland". Journal of Paleontology. 74 (2): 309–316. JSTOR 1306908.
References
- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.
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