Genre
Valide Éteint

Plesiosaurus

de la Beche and Conybeare 1821

Plesiosaurus est un genre fossile de grand reptiles aquatiques du super-ordre des Sauropterygia. Le Plesiosaurus vivait au début du Jurassique et est connu pour les squelettes presque complets retrouvés dans le Lias d'Angleterre et d'Allemagne. Il se distingue par une petite tête, un cou long et mince, un corps ressemblant à celui des tortues, une queue courte et deux paires de grandes nageoires. Il prête son nom à l'ordre des Plesiosauria, dont il est l'un des premiers et typiques membres. Selon Paleobiology Database en 2025, ce genre a pour espèce type Plesiosaurus dolichodeirus, et a aussi vingt-et-une espèces référencées.

Plage temporelle
Trias
Jurassique
Crétacé
Paléogène
Néogène
252 201 145 66 0 Ma
Occurrences PBDB
55
Groupe
Sauroptérygiens
Carnivore aquatic, depth=surface Marin
Plesiosaurus
cliquer pour agrandir
Mary Anning's plesiosaur: Plesiosaurus dolichodeirus Lower Jurassic Lyme Regis, England, UK © the paleobear · CC BY 2.0 · Wikimedia

Légende en anglais — traduction française non disponible.

PBDB Wikipedia
Classification
Sauropterygia Sous-ordre
Plesiosauria Ordre
Plesiosauroidea Superfamille
Plesiosaurus Genre
Mesures
Longueur
3,5 m
Sites de découverte 55 sites géolocalisés
Répartition
Principaux pays
🇬🇧 Royaume-Uni
33
🇫🇷 France
10
🇺🇸 États-Unis
3
🇧🇪 Belgique
2
🇨🇱 Chili
1
🇲🇽 Mexique
1
🇿🇦 Afrique du Sud
1
🇦🇺 Australie
1
🇷🇺 Russie
1
🇯🇵 Japon
1
Formations géologiques
Westbury
3
Charmouth Mudstone
3
Grès de Mortinsart
2
Argiles de Châtillon
2
Blue Lias
1
Braunjura alpha & Braunjura beta
1
Cerritos Bayos
1
Portland Stone
1
"Franciscan-Knoxville shales"
1
Distribution temporelle
Campanien (83.6–72.2 Ma)
3
Santonien (85.7–83.6 Ma)
1
Turonien (93.9–89.8 Ma)
2
Albien (113.2–100.5 Ma)
3
Hauterivien (132.6–125.77 Ma)
2
Valanginien (137.05–132.6 Ma)
1
Tithonien (149.2–143.1 Ma)
2
Kimméridgien (154.8–149.2 Ma)
12
Callovien (165.3–161.5 Ma)
1
Toarcien (184.2–174.7 Ma)
2
Pliensbachien (192.9–184.2 Ma)
9
Sinémurien (199.5–192.9 Ma)
6
Hettangien (201.4–199.5 Ma)
4
Rhétien (205.7–201.4 Ma)
7
Espèces (26)
Plesiosaurus bavaricus
Plesiosaurus bitractensis 206 Ma
Plesiosaurus brachycephalus subjective synonym of Plesiosaurus macrocephalus 201 Ma
Plesiosaurus carinatus 155 Ma
Plesiosaurus cliduchus 201 Ma
Plesiosaurus coelospondylus 184 Ma
Plesiosaurus costatus 206 Ma
Plesiosaurus dolichodeirus 201 Ma
Plesiosaurus elasmosaurus nomen nudum, species not entered Plesiosaurus
Plesiosaurus exarsostinus
Plesiosaurus grandis 155 Ma
Plesiosaurus hesternus 149 Ma
Plesiosaurus homei subjective synonym of Plesiosaurus dolichodeirus 201 Ma
Plesiosaurus houzeaui
Plesiosaurus macrocephalus 201 Ma
Plesiosaurus macrodeirus 155 Ma
Plesiosaurus macromus subjective synonym of Plesiosaurus dolichodeirus 201 Ma
Plesiosaurus mexicanus 139 Ma
Plesiosaurus nitidus 155 Ma
Plesiosaurus platydeirus 201 Ma
Plesiosaurus priscus nomen dubium, species not entered Plesiosaurus
Plesiosaurus rostratus 200 Ma
Plesiosaurus subconcavus 162 Ma
Plesiosaurus subtrigonus 201 Ma
Plesiosaurus tessarestarsostinus
Plesiosaurus trigonus
Synonymes (2)
Plesiosaurus elasmosaurus nomen nudum, species not entered Plesiosaurus
Plesiosaurus priscus nomen dubium, species not entered Plesiosaurus
Images 1
Bibliographie
Description originale
T. H. de la Beche and W. D. Conybeare. 1821. Notice of the discovery of a new Fossil Animal, forming a link between the Ichthyosaurus and the Crocodile, together with general remarks on the Osteology of the Ichthyosaurus. Transactions of the Geological Society of London, series 1 5:559-594
Bibliographie (37)
V.-H. Reynoso. 2006. Research on fossil amphibians and reptiles in Mexico, from 1869 to early 2004 (including marine forms but excluding pterosaurs, dinosaurs, and obviously, birds). Studies on Mexican Paleontology 24:209-231
P. J. Hopley. 2001. Plesiosaur spinal pathology: the first fossil occurrence of Schmorl's nodes. Journal of Vertebrate Paleontology 21(2):253-260 DOI ↗
F. Papier. 2001. Die Gundershoffener Klamm. Fossilien 6/01:368-374
P. J. Hopley. 2000. A new plesiosauroid specimen from the Sinemurian, Lower Jurassic, of southern England. Proceedings of the Dorset Archaeological and Natural History Society 122:129-138
G. W. Storrs. 1997. Morphological and taxonomic clarification of the genus Plesiosaurus. Ancient Marine Reptiles DOI ↗
G. W. Storrs. 1995. A juvenile specimen of ? Plesiosaurus sp. from the Lias (Lower Jurassic, Pliensbachian) near Charmouth, Dorset, England. Proceedings of the Dorsal Archaelogical and Natural History Society 116:71-76
J. B. Delair. 1993. Reptilia from the Portland Stone (Upper Jurassic) of England: a preliminary survey of the material and the literature. Modern Geology 18:331-348
A. Vadet and J. M. Rose. 1986. Catalogue commente des types et figures de dinosauriens, ichthyosauriens, sauropterygiens, pterosauriens et cheloninens du Musée d'Histoire Naturelle de Boulogne-sur-Mer [Annotated catalogue of the type and figured specimens of dinosaurs, ichthyosaurs, sauropterygians, pterosaurs, and turtles from the Musée d'Histoire Naturelle of Boulogne-sur-Mer]. In E. Buffetaut, J. M. Rose, & A. Vadet (eds.), Vértébrés Fossiles du Boulonnais. Mémoires de la Société Académique du Boulonnais 1(2):85-97
C. J. Duffin, P. Coupatez, and J. C. Lepage, G. Wouters. 1983. Rhaetian (Upper Triassic) marine faunas from "Le Golfe du Luxembourg" in Belgium (preliminary note). Bulletin de la Société Belge de Géologie 92(4):311-315
A. C. Hoffman. 1966. A gigantic plesiosaur from the South African Cretaceous. South African Journal of Science 62(5):138-140
W. Biese. 1961. El Jurásico de Cerritos Bayos [The Jurassic of Cerritos Bayos]. Universidad de Chile, Facultad de Ciencias Fisicas y Matematicas, Instituto de Geología, Publicación 19:1-61
J. B. Delair. 1960. The Mesozoic reptiles of Dorset. Part two. Proceedings of the Dorset Natural History and Archaeological Society 80:52-90
S. P. Welles. 1953. Jurassic plesiosaur vertebrae from California. Journal of Paleontology 27(5):743-744
K. P. Oakley. 1947. Fossil and sub-fossil vertebrates. Transactions of the Hertfordshire Natural History Society 22(5):239-246
S. Tokunaga and S. Shimizu. 1926. The Cretaceous Formation of Futaba in Iwaki and its fossils. Journal of Faculty of Science, Imperial University of Tokyo, Section 2 1:181-212 DOI ↗
M. G. Corroy. 1922. Les reptiles néocomiens et albiens du Bassin de Paris. Comptes rendus hebdomadaires des Séances de l'Académie des Sciences 174:1192-1194
T. Codrington. 1908. Note on the fossil remains of a Plesiosaurus from Savernake. Wiltshire Archaeological and Natural History Magazine 35:114-114
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
H.-E. Sauvage. 1900. Les Poissons et les Reptiles du Jurassique supérieur de Fumel (Lot-et-Garonne) [The fishes and reptiles from the Upper Jurassic of Fumel (Lot-et-Garonne)]. Bulletin de la Société Géologique de France, 3e série 28:496-499
R. L. Jack and R., Jr. Etheridge. 1892. The Geology and Palaeontology of Queensland and New Guinea. Publications of the Geological Survey of Queensland 92:1-768 DOI ↗
R. Lydekker. 1889. Catalogue of the Fossil Reptilia and Amphibia, Part II. Containing the orders Ichthyopterygia and Sauropterygia DOI ↗
H. Schröder. 1885. Saurierreste aus der baltischen oberen Kreide [Saurian remains from the Baltic Upper Cretaceous]. Jahrbuch der Königlich Preussischen geologischen Landesanstalt und Bergakademie zu Berlin 1884:293-333
H.-E. Sauvage. 1883. Recherches sur les reptiles trouvés dans l'étage rhétien des environs d'Autun [Research on the reptiles found in the Rhaetian stage of the environs of Autun]. Annales des Sciences Géologiques 14(3):1-44
J. Prestwich. 1880. Note on the occurrence of a new species of Iguanodon in a brick-pit of the Kimmeridge Clay at Cumnor Hurst, three miles W.S.W. of Oxford. Quarterly Journal of the Geological Society of London 36:430-432 DOI ↗
J. Hector. 1874. On the fossil Reptilia of New Zealand. Transactions and Proceedings of the Royal Society of New Zealand 6:333-358
J. Phillips. 1871. Geology of Oxford and the Valley of the Thames. Clarendon Press, Oxford DOI ↗
H. G. Seeley. 1869. Index to the Fossil Remains of Aves, Ornithosauria, and Reptilia, from the Secondary System of Strata, Arranged in the Woodwardian Museum of the University of Cambridge. Deighton, Bell, and Co, Cambridge DOI ↗
R. Owen. 1865. Part I. Sauropterygia. Monographs on the fossil Reptilia of the Liassic formations 17(75):1-40
H. G. Seeley. 1865. On two new plesiosaurs, from the Lias. Annals and Magazine of Natural History, series 3 16:352-359 DOI ↗
T. Wright. 1860. On the Zone of Avicula contorta, and the Lower Lias of the South of England. Quarterly Journal of the Geological Society 16:374-411 DOI ↗
O. Terquem. 1855. Paléontologie de l’étage inférieur de la Formation Liasique de la Province de Luxembourg (Grand-Duché) et de Hettange, Département de la Moselle [Paleontology of the lower stage of the Liassic Formation of the Province of Luxembourg (Grand Duchy) and Hettange, Moselle Department]. Mémoires de la Société Géologique de France 5(2):1-125
R. Owen. 1854. Descriptive catalogue of the Fossil organic remains of Reptilia and Pisces contained in the Museum of the Royal College of Surgeons of England. London
R. Owen. 1850. Descriptions of the fossils of the Chalk Formation. Description of the fossil reptiles of the Chalk Formation. The Geology and Fossils of the Tertiary and Cretaceous Formations of Sussex
P. Duff. 1842. Sketch of the Geology of Moray
R. Owen. 1840. Report on British fossil reptiles. Report of the British Association for the Advancement of Science 8:43-126
W. D. Conybeare. 1824. On the discovery of an almost perfect skeleton of the Plesiosaurus. Transactions of the Geological Society of London, series 2 1:381-389 DOI ↗
R. Harland. 1824. Notice of the Plesiosaurus, and other fossil Reliquiae, form the State of New Jersey. Journal of the Academy of Natural Sciences of Philadelphia 4(1):232-236