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
Dinosaurs "Coelosaurus" antiquus Ornithomimidae indet. Hadrosauridae indet.
Plesiosaurs Cimoliasaurus magnus
Mosasaurs Halisaurus platyspondylus Prognathodon rapax Mosasaurus hoffmanni Mosasaurus sp. cf. Mosasaurus conodon Mosasauridae indet.
Crocodylomorphs Deinosuchus rugosus Thoracosaurus neocesariensis Alligatorinae indet.
Turtles Peritresius ornatus Osteopygis emarginatus Trionyx priscus Toxochelyidae indet.
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
List of dinosaur-bearing rock formations List of stratigraphic units with few dinosaur genera
Footnotes
References Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. .