Genus
Valid Extinct

Ichthyosaurus

Koenig 1818
Etymology Lézard à corps de poisson

Ichthyosaurus is an extinct genus of ichthyosaurs from the Early Jurassic of Europe. Some specimens of the ichthyosaurid Protoichthyosaurus from England and Switzerland have been erroneously referred to this genus in the past. It is among the best known ichthyosaur genera, as it is the type genus of the order Ichthyosauria.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
101
Group
Ichtyosaures
Carnivore nektonic Marine
Ichthyosaurus
click to enlarge
Ichthyosaurus communis, Early Jurassic of England. Digital. © Nobu Tamura (http://spinops.blogspot.com) · CC BY 3.0 · Wikimedia
Ichthyosaurus
Ichthyosaurus
PBDB ↗ Wikipedia ↗
Classification
Ichthyosauria Unranked clade
›
Parvipelvia Unranked clade
›
Neoichthyosauria Unranked clade
›
Thunnosauria Unranked clade
›
Ichthyosauridae Family
›
Ichthyosaurus Genus
Measurements
Length
3 m ⓘ
Fossil sites 101 geolocated sites
Distribution
Top countries
🇬🇧 United Kingdom
59
🇫🇷 France
13
🇨🇱 Chile
8
🇺🇸 United States
6
🇩🇪 Germany
4
🇧🇪 Belgium
4
🇨🇭 Switzerland
2
🇨🇦 Canada
1
🇬🇱 Greenland
1
🇦🇷 Argentina
1
Geological formations
Blue Lias
15
White Lias
7
Alum Shale
4
Luning
3
Westbury
3
Oxford Clay
3
Exter
2
Lias
2
Luxembourg
2
Charmouth Mudstone
2
Temporal distribution
Albian (113.2–100.5 Ma)
1
Aptian (121.4–113.2 Ma)
1
Hauterivian (132.6–125.77 Ma)
2
Berriasian (143.1–137.05 Ma)
1
Tithonian (149.2–143.1 Ma)
8
Kimmeridgian (154.8–149.2 Ma)
8
Oxfordian (161.5–154.8 Ma)
2
Callovian (165.3–161.5 Ma)
6
Bajocian (170.9–168.2 Ma)
1
Aalenian (174.7–170.9 Ma)
1
Toarcian (184.2–174.7 Ma)
8
Pliensbachian (192.9–184.2 Ma)
10
Sinemurian (199.5–192.9 Ma)
14
Hettangian (201.4–199.5 Ma)
18
Rhaetian (205.7–201.4 Ma)
16
Norian (227.3–205.7 Ma)
4
Species (81)
Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus aduncus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus advena nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus aequalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus amalthei nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus angustidens nomen nudum, species not entered Ichthyosaurus 106 Ma
Ichthyosaurus anningae 193 Ma
Ichthyosaurus arietis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bambergensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus biscissus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bodenbenderi nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bonneyi nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus brachyspondylus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus breviceps 200 Ma
Ichthyosaurus californicus nomen dubium, species not entered Ichthyosaurus 149 Ma
Ichthyosaurus ceramensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus chalarodeirus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus chiroparamekostinus subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus chiropolyostinus subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus chirostrongulostinus subjective synonym of Ichthyosaurus tenuirostris 206 Ma
Ichthyosaurus communis 206 Ma
Ichthyosaurus coniformis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus conybeari 200 Ma
Ichthyosaurus crassicostatus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus crassimanus subjective synonym of Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus cuvieri nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus dilatatus nomen dubium, species not entered Ichthyosaurus 165 Ma
Ichthyosaurus entheciodon 149 Ma
Ichthyosaurus enthekiodon 152 Ma
Ichthyosaurus extremus
Ichthyosaurus fortimanus subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus franciscanus nomen dubium, species not entered Ichthyosaurus 193 Ma
Ichthyosaurus giganteus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus grandipes subjective synonym of Ichthyosaurus tenuirostris 206 Ma
Ichthyosaurus hectori nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus hexagonus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus hildesiensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus hygrodeirus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus immanis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus indicus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus intermedius subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus kokeni nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus lacunosae nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus larkini 201 Ma
Ichthyosaurus latifrons nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus latimanus subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus leucopetraeus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus longifrons subjective synonym of Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus longimanus
Ichthyosaurus longipennis subjective synonym of Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus longipes 184 Ma
Ichthyosaurus microdon subjective synonym of Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus nasimowii nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus normanniae nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus numismalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus ovalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus paramecostinus replaced by Ichthyosaurus somersetensis 201 Ma
Ichthyosaurus planartus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus platymerus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus polyostinus subjective synonym of Ichthyosaurus communis 206 Ma
Ichthyosaurus posthumus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus pottsi nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus psilonoti nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus quenstedti nomen dubium, species not entered Ichthyosaurus 165 Ma
Ichthyosaurus saladensis nomen dubium, species not entered Ichthyosaurus 162 Ma
Ichthyosaurus sanjuanensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus sinuatus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus somersetensis 201 Ma
Ichthyosaurus steleodon nomen dubium, species not entered Ichthyosaurus 133 Ma
Ichthyosaurus tenuirostris 206 Ma
Ichthyosaurus thyreospondylus nomen dubium, species not entered Ichthyosaurus 149 Ma
Ichthyosaurus torrei nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus torulosi nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus trigonodon
Ichthyosaurus trigonus nomen dubium, species not entered Ichthyosaurus 149 Ma
Ichthyosaurus triscissus
Ichthyosaurus walkeri nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus zetlandicus subjective synonym of Ichthyosaurus acutirostris 184 Ma
Ichthyosaurus zollerianus nomen dubium, species not entered Ichthyosaurus
Protoichthyosaurus prosostealis nomen dubium, species not entered Ichthyosaurus 201 Ma
Tibetosaurus tingjiensis nomen dubium, species not entered Ichthyosaurus
Synonyms (55)
Eurypterygius subjective synonym of Ichthyosaurus
Gryphus subjective synonym of Ichthyosaurus
Ichthyosaurus aduncus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus advena nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus aequalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus amalthei nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus angustidens nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus arietis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bambergensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus biscissus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bodenbenderi nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus bonneyi nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus brachyspondylus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus californicus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus ceramensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus chalarodeirus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus coniformis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus crassicostatus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus cuvieri nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus dilatatus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus franciscanus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus giganteus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus hectori nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus hexagonus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus hildesiensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus hygrodeirus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus immanis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus indicus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus kokeni nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus lacunosae nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus latifrons nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus leucopetraeus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus nasimowii nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus normanniae nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus numismalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus ovalis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus planartus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus platymerus nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus posthumus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus pottsi nomen nudum, species not entered Ichthyosaurus
Ichthyosaurus psilonoti nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus quenstedti nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus saladensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus sanjuanensis nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus sinuatus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus steleodon nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus thyreospondylus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus torrei nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus torulosi nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus trigonus nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus walkeri nomen dubium, species not entered Ichthyosaurus
Ichthyosaurus zollerianus nomen dubium, species not entered Ichthyosaurus
Protoichthyosaurus prosostealis nomen dubium, species not entered Ichthyosaurus
Tibetosaurus nomen dubium Ichthyosaurus
Tibetosaurus tingjiensis nomen dubium, species not entered Ichthyosaurus
News 1
On le croyait roi des océans au Jurassique : une vertèbre percée raconte un combat d’une violence extrême
He was believed to be king of the oceans in the Jurassic: a pierced vertebra recounts a fight of extreme violence
bone tooth vertebra hunting museum +6
Forgotten for more than a century in the drawers of a museum, a fossil has now resurfaced and recounts a scene of extreme violence in the Jurassic oceans. An ichthyosaur vertebra, marked by the impact of a broken tooth, perhaps reveals the attack of one of the most formidable...
17/06/2026 futura-terre ⚙ Auto-translated
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 (50)
D. R. Lomax and J. A. Massare. 2017. Two new species of Ichthyosaurus from the lowermost Jurassic (Hettangian) of Somerset, England. Papers in Palaeontology 3(1):1-20 DOI ↗
V. Fischer. 2016. Taxonomy of Platypterygius campylodon and the diversity of the last ichthyosaurs. PeerJ 4:e2604 DOI ↗
S. L. Brusatte, M. T. Young, and T. J. Challands, N. D. L. Clark, V. Fischer, N. C. Fraser, J. J. Liston, C. C. J. MacFayden, D. A. Ross, S. Walsh, M. Wilkinson. 2015. Ichthyosaurs from the Jurassic of Skye, Scotland. Scottish Journal of Geology DOI ↗
D. R. Lomax and J. A. Massare. 2015. A new species of Ichthyosaurus from the Lower Jurassic of west Dorset, England, U.K. Journal of Vertebrate Paleontology e903260:1-14 DOI ↗
J. A. Massare and D. R. Lomax. 2013. An Ichthyosaurus breviceps collected by Mary Anning: new information on the species. Geological magazine DOI ↗
S. P. Bennett, P. M. Barrett, and M. E. Collinson, S. Moore-Fay, P. G. Davis, C. P. Palmer. 2012. A new specimen of Ichthyosaurus communis from Dorset, UK, and its bearing on the stratigraphical range of the species. Proceedings of the Geologists' Association 123:146-154 DOI ↗
D. R. Lomax. 2010. An Ichthyosaurus (Reptilia, Ichthyosauria) with gastric contents from Charmouth, England: first report of the genus from the Pliensbachian. Paludicola 8(1):22-36
R. Moscoso, C. Mpodozis, and C. Nasi, L. Ribba, C. Arévalo. 2010. Moscoso, R.; Mpodozis, C.; Nasi, C.; Ribba, L.; Arévalo, C. (compilador) 2010. Geología de la Hoja El Tránsito, Región de Atacama. Servicio Nacional de Geología y Minería, Carta Geológica de Chile, Serie Preliminar 7: 3 anexos, 1 mapa escala 1:250.000. Santiago.
M. W. Maisch, A. G. Reisdorf, and R. Schlatter, A. Wetzel. 2008. A large skull of Ichthyosaurus (Reptilia: Ichthyosauria) from the Lower Sinemurian (Lower Jurassic) of Frick (NW Switzerland). Swiss Journal of Geoscience 101:617-627 DOI ↗
M. W. Maisch. 2008. Revision der gattung Stenopterygius Jaekel, 1904 emend. von Huene, 1922 (Reptilia: Ichthyosauria) aus dem unteren Jura Westeuropas. Palaeodiversity 1:227-271
A. S. Smith and J. D. Radley. 2007. A marine reptile fauna from the Early Jurassic Saltford Shale (Blue Lias Formation) of Central England. Proceedings of the Yorkshire Geological Society 56(4):253-260 DOI ↗
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
M. J. Benton and P. S. Spencer. 1995. Fossil Reptiles of Great Britain. Chapman & Hall, London DOI ↗
P. Godefroit. 1995. Un crâne d'Ichthyosaurus communis (Reptilia, Ichthyosauria) du Sinémurien supérieur de Lorraine belge. Bulletin de Société belge de Géologie 104(1-2):77-89
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
M. Suárez and C. M. Bell. 1992. The oldest South American ichthyosaur from the late Triassic of northern Chile. Geological Magazine 129(2):247-249 DOI ↗
S. S. Dennison, P. L. Smith, and H. W. Tipper. 1990. An Early Jurassic ichthyosaur from the Sandilands Formation, Queen Charlotte Islands, British Columbia. Journal of Paleontology 64(5):850-853 DOI ↗
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
M. J. Benton and M. A. Taylor. 1984. Marine reptiles from the Upper Lias (Lower Toarcian, Lower Jurassic) of the Yorkshire coast. Proceedings of the Yorkshire Geological Society 44(4):399-429 DOI ↗
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
W. Pockrandt. 1982. Aufgelassene Tongruben der Unterkreide im Norden Hannovers. Arbeitskreis Paläontologie Hannover 10(5):6-15
R. M. Appleby. 1979. The affinities of Liassic and later ichthyosaurs. Palaeontology 22(4):921-946
G. D. Stanley, Jr. 1979. Paleoecology, structure, and distribution of Triassic coral buildups in western North America. The University of Kansas Paleontological Contributions 65:1-68
C. McGowan. 1974. A revision of the latipinnate ichthyosaurs of the Lower Jurassic of England (Reptilia: Ichthyosauria). Life Sciences Contribution Royal Ontario Museum 100:1-30 DOI ↗
J. E. Pollard. 1968. The gastric contents of an ichthyosaur from the Lower Lias of Lyme Regis, Dorset. Palaeontology 11(3):376-388
C. L. Camp and J. G. Koch. 1966. Late Jurassic ichthyosaur from coastal Oregon. Journal of Paleontology 40(1):204-205
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
C. Rusconi. 1948. Ictiosaurios del Jurásico de Mendoza (Argentina) [Ichthyosaurs from the Jurassic of Mendoza (Argentina)]. Revista del Museo de Historia Natural de Mendoza 2:17-160
C. L. Camp. 1942. Ichthyosaur rostra from central California. Journal of Paleontology 16(3):362-371
G. Corroy. 1934. Les poissons et les reptiles du Muschelkalk et du Rhetien de Basse-Provence. Bulletin de la Societe geologique de France 3, serie 5(5-6):475-483
B. Peyer and E. Koechlin. 1934. Ein Saurierwirbel aus dem Terrain à chailles von Grellingen (Berner Jura); (A sauromorph vertebra from Terrain à chailles of Grellingen (Berner Jura)). Verhandlungen der naturforschenden Gesellschaft in Basel 45:68-75
A. Rosenkrantz. 1934. The Lower Jurassic Rocks of East Greenland Part 1. Meddelelser Om Gronland 110(1):4-122
F. v. Huene. 1933. Zur Kenntnis der Württemburgischen Rhätbonebeds mit Zahnfunden neuer Säuger und säugerzähnlicher Reptilien. Jahreshefte des Vereins für vaterländische Naturkunde in Württemburg 1933:65-128
H.-E. Sauvage. 1914. Catalogue des Reptiles Jurassiques du Boulonnais [Catalogue of Jurassic reptiles from the Boulonnais]. Bulletin de la société Academique de l'Arrondissement de Boulogne-sur-Mer 10:253-264
N. N. Bogobulow. 1909. Sur quelques restes de deux reptiles (Cryptoclidus simbirskensis n. sp. et Ichthyosaurus steleodon n. sp.), trouvés par Mr. le Profes. A. P. Pavlow sur les bords de la Volga dans les couches mésozoïques de Simbirsk. Annuaire géologique et minéralogique de la Russie 11(1-3):42-64
L. Dollo. 1909. The fossil vertebrates of Belgium. Annals of the New York Academy of Science 19(4):99-119 DOI ↗
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
E. Fraas. 1896. Die Schwäbischen Trias-Saurier nach dem Material der Kgl. Naturalien-Sammlung in Stuttgart zusammengestellt [Swabian Triassic dinosaurs based on the material in the Royal Natural History Collection compiled in Stuttgart]. Festgabe des Königlichen Naturalien-Cabinets In Stuttgart zur 42 Versammlung der Deutschen geologischen Gesellschaft in Stuttgart, August 1896. E. Schweizerbart'sche Verlag-handlung (E. Koch), Stuttgart
R. Lydekker. 1888. Catalogue of the Fossil Reptilia and Amphibia in the British Museum (Natural History). Part I. Containing the Orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria. British Museum (Natural History), London DOI ↗
H.-E. Sauvage. 1888. Sur les Reptiles trouvés dans le Portlandien supérieur de Boulogne-sur-Mer [On the reptiles found in the upper Portlandian of Boulogne-sur-Mer]. Bulletin de la Société Géologique de France, 3e série 16:623-632
R. Owen. 1884. A History of British Fossil Reptiles, Part III.
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 ↗
M. J. Henry. 1876. L'Infralias dans la Franche-Comté [The Lower Lias of Franche-Comté]. Mémoires de la Société d'Émulation du Doubs, 4e série 10:287-486
J. W. Hulke. 1871. Note on an ichthyosaurus (I. enthekiodon) from Kimmeridge Bay, Dorset. Quarterly Journal of the Geological Society 27:440-441 DOI ↗
J. Phillips. 1871. Geology of Oxford and the Valley of the Thames. Clarendon Press, Oxford 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 ↗
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
T. Hawkins. 1834. Memoirs of Ichthyosauri and Plesiosauri, Extinct Monsters of the Ancient Earth
B. Geslin. 1833. [Une vertèrbre de Megalosaurus] [A vertebra of Megalosaurus]. Bulletin de la Société Géologique de France 3:281