Severn Formation
| Severn Formation | |
|---|---|
Stratigraphic range: | |
| 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.[1]
Paleofauna[edit]
Dinosaurs[edit]
- "Coelosaurus" antiquus[2]
- Ornithomimidae indet.[3]
- Hadrosauridae indet.[2][3]
Plesiosaurs[edit]
Mosasaurs[edit]
- Halisaurus platyspondylus[4][2]
- Prognathodon rapax[2]
- Mosasaurus hoffmanni[2]
- Mosasaurus sp.[3]
- cf. Mosasaurus conodon[2]
- Mosasauridae indet.[2]
Crocodylomorphs[edit]
Turtles[edit]
Chondrichthyans[edit]
- Carcharias holmdelensis[3]
- Carcharias samhammeri[3]
- Chiloscyllium greeni[3]
- Cretalamana appendiculata[3]
- Dasyatis sp.[3]
- Tomewingia problematica[3]
- Galeorhinus garadoti[3]
- Ginglymostoma sp.[3]
- Heterodontus sp.[3]
- Hybodus sp.[3]
- Ischyrhiza cf. avonicola[3]
- Ischyrhiza mira[3]
- Myliobatis sp.[3]
- Odontaspis aculeatus[3]
- Plicatoscyllium antiquum[3]
- Plicatoscyllium derameei[3]
- Pseudohypolophus mcnultyi[3]
- Ptychotrygon vermiculata[3]
- Raja farishi[3]
- Rhinobatos sp.[3]
- Rhombodus binkhorsti[3]
- Serratolamna serrata[3]
- Squalicorax kaupi[3]
- Squalicorax pristodontus[3]
- Squatina hassei[3]
- Ischyodus sp.[3]
Osteichthyans[edit]
- Albuidae indet.[3]
- Anomoedus cf. haseolus[3]
- Cylinadracanthus sp.[3]
- Egertonia sp.[3]
- Enchodus ferox[3]
- Hadrodus sp.[3]
- Lepidosteus sp.[3]
- Paralbula casei[3]
See also[edit]
Footnotes[edit]
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ a b c d e f g h i j k l m Baird, Donald (1986). "Upper Cretaceous Reptiles from the Severn Formation of Maryland". The Mosasaur. 3: 63–85.
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap 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[edit]
- 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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