Severn Formation
{{Short description|Geological Formation in Maryland}}
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| name = Severn Formation
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| type = Geological formation
| period = Maastrichtian
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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.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
Paleofauna
= [[Dinosaur]]s =
- "Coelosaurus" antiquus{{Cite journal |last=Baird |first=Donald |date=1986 |title=Upper Cretaceous Reptiles from the Severn Formation of Maryland |url=https://archive.org/details/baird-1986-severn-formation/ |journal=The Mosasaur |volume=3 |pages=63–85}}
- Ornithomimidae indet.{{Cite journal |last=Hartstien |first=Eugene F |last2=Decina |first2=Lawrence E |last3=Keil |first3=Ronald F |date=1999 |title=A Late Cretaceous (Severn Formation) Vertebrate Assemblage from Bowie, Maryland |url=https://archive.org/details/hartstein-et-al-1999-severn-fm |journal=The Mosasaur |volume=6 |pages=17–23}}
- Hadrosauridae indet.
= [[Plesiosaur]]s =
= [[Mosasaur]]s =
- Halisaurus platyspondylus{{cite journal|last1=Holmes|first1=Robert B.|last2=Sues|first2=Hans-Dieter|title=A Partial Skeleton of the Basal Mosasaur Halisaurus platyspondylus from the Severn Formation (Upper Cretaceous: Maastrichtian) of Maryland|journal=Journal of Paleontology|date=2000|volume=74|issue=2|pages=309–316|jstor=1306908}}
- Prognathodon rapax
- Mosasaurus hoffmanni
- Mosasaurus sp.
- cf. Mosasaurus conodon
- Mosasauridae indet.
= [[Crocodylomorpha|Crocodylomorphs]] =
= [[Turtle]]s =
= [[Chondrichthyes|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.
= [[Osteichthyes|Osteichthyans]] =
- Albuidae indet.
- Anomoedus cf. haseolus
- Cylinadracanthus sp.
- Egertonia sp.
- Enchodus ferox
- Hadrodus sp.
- Lepidosteus sp.
- Paralbula casei
See also
{{Portal|Earth sciences|Paleontology|Dinosaurs||}}
Footnotes
{{Reflist}}
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}}.
Category:Maastrichtian Stage of North America
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