Genus
Valid Extinct

Cimoliasaurus

Leidy 1851

Cimoliasaurus was a plesiosaur that lived during the Late Cretaceous (Maastrichtian) of the eastern United States, with fossils known from New Jersey, North Carolina, and Maryland.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
18
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
Cimoliasaurus
click to enlarge
Cimoliasaurus magnus vertebrae. © Leidy · Public domain · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Plesiosauroidea Superfamily
›
Elasmosauridae Family
›
Cimoliasaurus Genus
Measurements
Length
7,6 m ⓘ
Fossil sites 18 geolocated sites
Distribution
Top countries
🇺🇸 United States
11
🇬🇧 United Kingdom
3
🇦🇺 Australia
1
🇨🇿 Czech Republic
1
🇨🇦 Canada
1
🇨🇱 Chile
1
Geological formations
Navesink
4
Severn
3
Kimmeridge Clay
1
Wallumbilla
1
Eagle Ford
1
Bila-Hora
1
Bearpaw Shale
1
Mooreville Chalk
1
Quiriquina
1
New Egypt
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
9
Campanian (83.6–72.2 Ma)
3
Turonian (93.9–89.8 Ma)
2
Cenomanian (100.5–93.9 Ma)
2
Aptian (121.4–113.2 Ma)
1
Kimmeridgian (154.8–149.2 Ma)
1
Species (7)
Brimosaurus grandis nomen dubium, species not entered Cimoliasaurus 84 Ma
Cimoliasaurus brevior nomen dubium, species not entered Cimoliasaurus 155 Ma
Cimoliasaurus maccoyi nomen dubium, species not entered Cimoliasaurus 121 Ma
Cimoliasaurus magnus 84 Ma
Cimoliosaurus laramiensis
Cimoliosaurus magnus
Cimoliosaurus snowii
Synonyms (5)
Brimosaurus grandis nomen dubium, species not entered Cimoliasaurus
Cimoliasaurus brevior nomen dubium, species not entered Cimoliasaurus
Cimoliasaurus maccoyi nomen dubium, species not entered Cimoliasaurus
Hunosaurus subjective synonym of Cimoliasaurus
Iserosaurus subjective synonym of Cimoliasaurus
Images 1
Bibliography
Original description
J. J., Jr. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560
Bibliography (15)
W. R. Callahan, C. M. Mehling, and R. K. Denton Jr, D. C. Parris. 2014. Vertebrate Paleontology and Stratigraphy of the Late Cretaceous Holmdel Park Site, Monmouth County, New Jersey. Dakoterra 6:163-169
B. P. Kear, B. Ekrt, and J. Prokop, G. L. Georgalis. 2014. Turonian marine amniotes from the Bohemian Cretaceous Basin, Czech Republic. Geological Magazine 151(1):183-198 DOI ↗
E. F. Hartstein, L. E. Decina, and R. F. Keil. 1999. A Late Cretaceous (Severn Formation) Vertebrate Assemblage from Bowie, Maryland. The Mosasaur 6:17-23
M. J. Benton and P. S. Spencer. 1995. Fossil Reptiles of Great Britain. Chapman & Hall, London DOI ↗
W. B. Gallagher. 1993. The Cretaceous/Tertiary mass extinction event in the North Atlantic coastal plain. The Mosasaur 5:75-154
D. Baird. 1986. Upper Cretaceous reptiles from the Severn Formation of Maryland. The Mosasaur 3:63-85
W. B. Gallagher, D. C. Parris, and E. E. Spamer. 1986. Paleontology, biostratigraphy, and depositional environments of the Cretaceous-Tertiary transition in the New Jersey coastal plain. The Mosasaur 3:1-35
D. C. Parris. 1974. Additional records of plesiosaurs from the Cretaceous of New Jersey. Journal of Paleontology 48(1):32-35
D. A. Russell. 1967. Cretaceous vertebrates from the Anderson River N. W. T. Canadian Journal of Earth Sciences 4(1):21-38 DOI ↗
J. B. Delair. 1960. The Mesozoic reptiles of Dorset. Part two. Proceedings of the Dorset Natural History and Archaeological Society 80:52-90
K. Lambrecht. 1929. Neogaeornis wetzeli, n. g., n. s., der erste Kreidevogel der südlichen Hemisphäre [Neogaeornis wetzeli n. g. n. sp. the first Cretaceous bird from the Southern Hemisphere]. Paläontologische Zeitschrift 11:121-128 DOI ↗
C. H. Sternberg. 1915. Evidence proving that the Belly River beds of Alberta are equivalent with the Judith River beds of Montana. Science 42(1073):131-133 DOI ↗
R., Jr. Etheridge. 1904. A second sauropterygian converted into opal from the Upper Cretaceous of White Cliffs, New South Wales. With indications of ichthyopterygians at the same locality. Records of the Australian Museum 5(5):306-316 DOI ↗
R. T. Hill. 1901. Geography and geology of the Black and Grand Prairies, Texas. Twenty-First Annual Report of the United States Geological Survey. Part VII—Texas
E. D. Cope. 1869. Synopsis of the Extinct Batrachia, Reptilia and Aves of North America. Part I. Transactions of the American Philosophical Society, New Series 14:1-104 DOI ↗