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List of ichthyosauromorph genera

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Summary

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This list of ichthyosauromorphs is a comprehensive listing of all genera that have ever been included in the clade Ichthyosauromorpha, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that are no longer considered ichthyopterygian. Non-ichthyosaur ichthyopterygians shall be noted as such. This list contains **** genera.

Scope and terminology

There is no official, canonical list of ichthyosauromorph genera but one of the most thorough attempts can be found at the "Ichthyosauromorpha" section of Mikko Haaramo's Phylogeny Archive.

Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include:

Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
Nomen nudum (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. Nomina nuda (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a nomen nudum and will be italicized on this list. Often, the formally published name will differ from any nomina nuda that describe the same specimen. In this case, these nomina nuda will be deleted from this list in favor of the published name.
Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
Nomen dubium (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation, this term is not used on this list.

The list

Genus	Authors	Year	Status	Age	Location	Notes	Images
author=Fischer,V.	author2=Maisch, M.W.	author3=Naish, D.	author4=Kosma, R.	author5=Liston, J.	author6=Joger, U.	author7=Krüger, F.J.	author8=Pérez,J.P.	author9=Tainsh, J.	author10=Appleby, R.M.	year=2012	title=New Ophthalmosaurid Ichthyosaurs from the European Lower Cretaceous Demonstrate Extensive Ichthyosaur Survival across the Jurassic–Cretaceous Boundary	journal=PLOS ONE	volume=7	issue=1	article-number=e29234	doi=10.1371/journal.pone.0029234	pmid=22235274	pmc=3250416	bibcode=2012PLoSO...729234F	doi-access=free }}	Fischer et al.	2012	Valid	Early Cretaceous	Germany
United Kingdom
(England)	Possessed an unusually rigid trunk, which would make the extent of its lateral locomotion very limited	[[File:Acamptonectes NT.jpg	200px]]
Actiosaurus	Sauvage	1883	Dubious	Late Triassic	France	While originally described as a dinosaur and later reinterpreted as an ichthyosaur, it may actually represent a choristodere	[[File:Actiosaurus.jpg	200px]]
author1=Jair Israel Barrientos Lara	author2=Jesús Alvarado Ortega	author3=Marta S.Fernández	year=2020	title=Acuetzpalin carranzai gen et sp. nov. A new ophthalmosauridae (Ichthyosauria) from the Upper Jurassic of Durango, North Mexico	journal=Journal of South American Earth Sciences	volume=98	article-number=102456	doi=10.1016/j.jsames.2019.102456	bibcode=2020JSAES..9802456B	s2cid=213102661 }}	Barrientos-Lara & Alvarado-Ortega	2020	Valid	Late Jurassic	Mexico	Known from a partial limbless skeleton with a well-preserved skull
last1 = Bardet	first1 = N	last2 = Fernández	first2 = M	year = 2000	title = A new ichthyosaur from the Upper Jurassic lithographic limestones of Bavaria	journal = Journal of Paleontology	volume = 74	issue = 3	pages = 503–511	doi=10.1666/0022-3360(2000)0742.0.co;2	s2cid = 131190803	url = http://doc.rero.ch/record/14941/files/PAL_E2088.pdf }}	Bardet & Fernández	2000	Valid	Late Jurassic to Early Cretaceous	France
Germany	Four of its caudal vertebrae made its tail to bend roughly 45° downwards	[[File:Unnamed ichthyosaur Blumenberg.jpg	200px]]
Anhuisaurus	Chen	1985	Jr. synonym	N/A	N/A	Preoccupied by lizard genus Anhuisaurus (Hou, 1974). Junior synonym of Chaohusaurus
last1=Miedema	first1=Feiko	last2=Bastiaans	first2=Dylan	last3=Scheyer	first3=Torsten M.	last4=Klug	first4=Christian	last5=Maxwell	first5=Erin E.	date=2024-03-16	title=A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria	journal=BMC Ecology and Evolution	volume=24	issue=1	page=34	doi=10.1186/s12862-024-02208-3	pmid=38493100	doi-access=free	issn=2730-7182	pmc=10944604 }}	Miedema et al.	2024	Valid	Middle Jurassic	Switzerland	May have preserved traumatic injuries based on abnormalities in its skeleton	[[File:Argovisaurus Life Restoration.png	200px]]
Arthropterygius	Maxwell	2010	Valid	Late Jurassic to Early Cretaceous?	Argentina
Canada
Norway
Russia	Its rostrum was relatively short and robust	[[File:Arthropterygius Scale.svg	200px]]
Athabascasaurus	Druckenmiller & Maxwell	2010	Valid	Early Cretaceous	Canada	The holotype was discovered at an oilsand mine	[[File:Athabascasaurus bitumineus holotype.jpg	200px]]
last1=Zverkov	first1=N.G.	last2=Grivoriev	first2=D.V.	last3=Wolnievicz	first3=A.S.	last4=Konstantinov	first4=A.G.	last5=Sobolev	first5=E.S.	year=2021	title=Ichthyosaurs from the Upper Triassic (Carnian–Norian) of the New Siberian Islands, Russian Arctic, and their implications for the evolution of the ichthyosaurian basicranium and vertebral column	journal= Earth and Environmental Science Transactions of the Royal Society of Edinburgh	volume=113	pages=51–74	doi=10.1017/S1755691021000372	s2cid=245153589 }}	Zverkov et al.	2021	Valid	Late Triassic	Russia	Suggested to be a small-bodied animal although its exact ontogenetic stage is uncertain due to fragmentary remains
last1=Ren	first1=Jicheng	last2=Jiang	first2=Haishui	last3=Xiang	first3=Kunpeng	last4=Sullivan	first4=Corwin	last5=He	first5=Yongzhong	last6=Cheng	first6=Long	last7=Han	first7=Fenglu	date=2022-04-07	title=A new basal ichthyosauromorph from the Lower Triassic (Olenekian) of Zhebao, Guangxi Autonomous Region, South China	journal=PeerJ	language=en	volume=10	article-number=e13209	doi=10.7717/peerj.13209	issn=2167-8359	pmc=8995025	pmid=35415016	doi-access=free }}	Ren et al.	2022	Valid	Early Triassic	China	Very similar to Utatsusaurus	[[File:Baisesaurus (holotype, CUGW VH107).png	200px]]
Baptanodon	Marsh	1880	Valid	Late Jurassic	United States	Formerly erroneously thought to have been toothless	[[File:Gilmore Notes on Osteology of Baptanodon Plate XXXVI.png	200px]]
Barracudasauroides	Maisch	2010	Valid	Middle Triassic	China	Only known from a partial skeleton originally referred to Mixosaurus	[[File:Barracudasauroides NT.jpg	200px]]
Barracudasaurus	Jiang et al.	2005	Dubious	Middle Triassic	China	Its premaxillary teeth were rounded in cross-section
Besanosaurus	Dal Sasso & Pinna	1996	Valid	Middle Triassic	Italy
Switzerland	May have had strong jaw muscles as indicated by its skull bones	[[File:BesanosaurusDB15.jpg	200px]]
last = Sepkoski	first = Jack	title = A compendium of fossil marine animal genera (entry on Reptilia)	journal = Bulletins of American Paleontology	volume = 364	page=560	year = 2002	url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=663&rank=class	access-date = 2008-09-28}}	von Huene	1922	Valid	Late Jurassic	United Kingdom
(England)	Closely related to Platypterygius and Caypullisaurus	[[File:Brachypterygius NT small.jpg	200px]]
Californosaurus	Kuhn	1934	Valid	Middle Triassic to Late Triassic	Germany
United States	Originally named as a species of Shastasaurus	[[File:Californosaurus2 NT small.jpg	200px]]
Callawayia	Maische & Matzke	2000	Valid	Late Triassic	Canada	The morphology of its scapulae was more similar to those of Jurassic ichthyosaurs than to other Triassic taxa	[[File:Callawayia SW.png	200px]]
Cartorhynchus	Motani et al.	2014	Valid	Early Triassic	China	Represents a sudden diversification of marine reptiles that occurred shortly after the Permian-Triassic extinction event	[[File:Cartorhynchus NT.jpg	200px]]
Catutosaurus	Fernández et al.	2021	Valid	Late Jurassic	Argentina	Represented by at least three fragmentary specimens
Caypullisaurus	Fernández	1997	Valid	Late Jurassic to Early Cretaceous	Argentina	Each of its forelimbs contained ten digits	[[File:Caypullisaurus Dak1.jpg	200px]]
last = Haaramo	first = Mikko	title = Euichthyosauria	work = Mikko's Phylogeny Archive	date=11 March 2004	url = http://www.helsinki.fi/~mhaaramo/metazoa/deuterostoma/chordata/reptilia/ichthyosauromorpha/euichthyosauria.html	access-date = 9 October 2008}}	Fernández	1994	Valid	Middle Jurassic	Argentina	Inconsistent in phylogenetic placement	[[File:Chacaicosaurus_SW.png	200px]]
Chaohusaurus	Young & Dong	1972	Valid	Early Triassic	China	One specimen preserves the remains of two embryos and a neonate	[[File:Chaohusaurus BW.jpg	200px]]
Chensaurus	Mazin et al.	1991	Jr. synonym	N/A	N/A	Junior synonym of Chaohusaurus
Chonespondylus	Leidy	1868	Jr. synonym	N/A	N/A	Junior synonym of Cymbospondylus
last1 = Maisch	last2 = Matzke	first2 = A. T.	year = 2000	title = The mixosaurid ichthyosaur Contectopalatus from the Middle Triassic of the German Basin	journal = Lethaia	volume = 33	issue = 2	pages = 71–74	doi=10.1080/00241160050150186	bibcode = 2000Letha..33...71M }}	Maische & Matzke	1998	Jr. synonym?	N/A	N/A	Possibly a junior synonym of Phalarodon
author=Patrick S. Druckenmiller	author2=Jørn H. Hurum	author3=Espen M. Knutsen	author4=Hans Arne Nakrem	name-list-style=amp	year=2012	title=Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway	journal=Norwegian Journal of Geology	volume=92	issue=2–3	pages=311–339	url=https://njg.geologi.no/images/NJG_articles/NJG_2_3_2012_17_Druckenmiller_etal_Pr.pdf }}	Druckenmiller et al.	2012	Jr. synonym	N/A	N/A	Junior synonym of Undorosaurus
Cymbospondylus	Leidy	1868	Valid	Early Triassic to Middle Triassic	Switzerland
United States	Lacked a dorsal fin and fluked tail, which would suggest it probably swam by wriggling its body from side to side like a modern sea snake	[[File:Cymbospondylus youngorum reconstruction 2023.jpg	200px]]
Dearcmhara	Brusatte et al.	2015	Valid	Early Jurassic to Middle Jurassic	United Kingdom
(Scotland)	The first ichthyosaur discovered in Scotland
Delphinosaurus	Eichwald	1853	Dubious	Early Cretaceous to Late Cretaceous	Russia	Originally mistakenly believed to be an amphibian
Eretmorhipis	Chen et al.	2015	Valid	Early Triassic	China	Exhibited a suite of unusual features, such as relatively small eyes, a platypus-like snout, and plates on its back similar to those of stegosaurs	[[File:Eretmorhipis complete.jpg	200px]]
Eternauta	Campos et al.	2025	Valid	Late Jurassic	Argentina	May have relied on deep-diving while hunting its prey as suggested by its preserved scleral ring	[[File:Skull of Eternauta patagonica.jpg	200px]]
Eurhinosaurus	Abel	1909	Valid	Early Jurassic	Belgium
France
Germany
Luxembourg
Netherlands
Switzerland
United Kingdom
(England)	Its upper jaw was twice as long as the lower jaw, convergent with billfish	[[File:Eurhinosaurus BW.jpg	200px]]
Eurypterygius	Jaekel	1904	Jr. synonym	N/A	N/A	Junior synonym of Ichthyosaurus
Excalibosaurus	McGowan	1986	Valid	Early Jurassic	United Kingdom
(England)	May have been a rare component of its environment as only two skeletons are known	[[File:Excalibosaurus_BW.jpg	200px]]
last1=Massare	first1=Judy A.	last2=Edmunds	first2=Murray	last3=Morris	first3=Robert J.	last4=Poulton	first4=Terence P.	last5=En Pan	first5=Shyong	last6=Mallon	first6=Jordan C.	date=June 2025	title=The most complete Early Jurassic ichthyosaur from North America	journal=Paludicola	publisher=Rochester Institute of Vertebrate Paleontology	volume=15	issue=2	pages=86–99	language=en	url=https://www.researchgate.net/publication/392596228}}	Massare et al.	2025	Valid	Early Jurassic	Canada	The most complete ichthyosaur known from the Early Jurassic of North America
last1=Pratas e Sousa	first1=Joao	last2=Roldão	first2=Isabel	last3=Rios-Ibanez	first3=Maria	last4=Puertólas-Pascual	first4=Eduardo	date=2025	title=A new ichthyosaur from the Lower Jurassic of Portugal (Iberian Peninsula)	url=https://www.app.pan.pl/article/item/app011992024.html	journal=Acta Palaeontologica Polonica	volume=70	issue=1	pages=179–192	doi=10.4202/app.01199.2024	doi-access=free	hdl=10362/187789	hdl-access=free }}	Pratas e Souza et al.	2025	Valid	Early Jurassic	Portugal	Although the majority of the cranial sutures are completely fused, which is often seen in adult ichthyosaurs, the midline suture is not fused, which would indicate the holotype belonged to either a juvenile or subadult individual	[[File:Gadusaurus (holotype, ML 2750).png	200px]]
Gengasaurus	Paparella et al.	2017	Valid	Late Jurassic	Italy	Before its formal description, it had been nicknamed the "Genga ichthyosaur"
Grendelius	McGowan	1976	Valid	Late Jurassic	Russia
United Kingdom
(England)	Once considered to be synonymous with Brachypterygius	[[File:Otshevia2DB.jpg	200px]]
Grippia	Wiman	1930	Valid	Early Triassic	Canada
China
Greenland
Japan
Norway	Members of this genus may have swum by moving their tails laterally, similar to an eel	[[File:Grippia1DB.jpg	200px]]
Guanlingsaurus	Yin et al.	2000	Valid	Late Triassic	China	Has been suggested to be an Asian species of Shastasaurus	[[File:Guanlingsaurus restoration.jpg	200px]]
Guizhouichthyosaurus	Cao & Luo	2000	Valid	Middle Triassic to Late Triassic	China	Two morphotypes of skulls and limbs are known, which could be an indication of sexual dimorphism	[[File:Guizhouichthyosaurus SW.png	200px]]
author=Robin S. Cuthbertson	author2=Anthony P. Russell	author3=Jason S. Anderson	name-list-style=amp	year=2013	title=Cranial morphology and relationships of a new grippidian (Ichthyopterygia) from the Vega-Phroso Siltstone Member (Lower Triassic) of British Columbia, Canada	journal=Journal of Vertebrate Paleontology	volume=33	issue=4	pages=831–847	doi=10.1080/02724634.2013.755989	bibcode=2013JVPal..33..831C	s2cid=131501541 }}	Cuthbertson et al.	2013	Valid	Early Triassic	Canada	Originally thought to belong to either Grippia or Parvinatator
Hauffiopteryx	Maisch	2008	Valid	Early Jurassic	Germany
Luxembourg
Switzerland
United Kingdom
(England)	Distinguished by its short, very thin snout	[[File:Hauffiopteryx SW 1.png	200px]]
Himalayasaurus	Dong	1972	Valid	Late Triassic	China	Similarly to Thalattoarchon, its teeth possessed distinctive cutting edges	[[File:Himalayasaurus.png	200px]]
Hudsonelpidia	McGowan	1995	Valid	Late Triassic	Canada	The holotype specimen is almost complete	[[File:Hudsonelpidia.jpg	200px]]
last = Haaramo	first = Mikko	title = Ichthyosauromorpha	work = Mikko's Phylogeny Archive	date=14 July 2004	url = http://www.helsinki.fi/~mhaaramo/metazoa/deuterostoma/chordata/reptilia/ichthyosauromorpha/ichthyosauromorpha.html	access-date = 9 October 2008}}	Young	1972	Valid	Early Triassic	China	last1=Motani	first1=Ryosuke	last2=Pyenson	first2=Nicholas D.	last3=Jiang	first3=Da-yong	year=2025	title=Was Hupehsuchus a baleen whale-style filter feeder in the Early Triassic? A re-examination of the evidence	journal=PeerJ	volume=13	article-number=e19666	doi=10.7717/peerj.19666	doi-access=free	pmc=12232927}}	[[File:Hupehsuchus.jpg	200px]]
Ichthyosaurus	De la Beche & Conybeare	1821	Valid	Early Jurassic	Belgium
Germany
Portugal
United Kingdom
(England)	The first ichthyosaur genus to be validly named and described	[[File:Ichthyosaurus BW.jpg	200px]]
last1=Lomax	first1=D. R.	last2=de la Salle	first2=P.	last3=Perillo	first3=M.	last4=Reynolds	first4=J.	last5=Reynolds	first5=R.	last6=Waldron	first6=J. F.	title=The last giants: New evidence for giant Late Triassic (Rhaetian) ichthyosaurs from the UK	year=2024	journal=PLOS ONE	volume=19	issue=4	at=e0300289	doi=10.1371/journal.pone.0300289	doi-access=free	pmid=38630678	pmc=11023487	bibcode=2024PLoSO..1900289L }}	Lomax et al.	2024	Valid	Late Triassic	United Kingdom
(England)	The largest ichthyosaur and marine reptile currently known	[[File:Ichthyotitan severnensis speculative restoration.png	200px]]
Isfjordosaurus	Motani	1999	Valid	Early Triassic	Norway	Named as a species of Pessopteryx before being assigned to its own genus
Jabalisaurus	Barrientos-Lara & Alvarado-Ortega	2021	Valid	Late Jurassic	Mexico	Originally believed to be a specimen of Ophthalmosaurus
author=Aubrey Jane Roberts	author2=Patrick Scott Druckenmiller	author3=Glenn-Peter Sætre	author4=Jørn Harald Hurum	name-list-style=amp	year=2014	title=A New Upper Jurassic Ophthalmosaurid Ichthyosaur from the Slottsmøya Member, Agardhfjellet Formation of Central Spitsbergen	journal=PLOS ONE	volume=9	issue=8	article-number=e103152	doi=10.1371/journal.pone.0103152	pmid=25084533	pmc=4118863	bibcode=2014PLoSO...9j3152R	doi-access=free }}	Roberts et al.	2014	Valid	Late Jurassic	Norway	last1=Delsett	first1=L. L.	last2=Roberts	first2=A. J.	last3=Druckenmiller	first3=P. S.	last4=Hurum	first4=J. H.	year=2019	title=Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)	journal=Acta Palaeontologica Polonica	volume=64	issue=4	pages=717–743	doi=10.4202/app.00571.2018	s2cid=210294877	doi-access=free	hdl=10852/76089	hdl-access=free}}	[[File:Janusaurus.png	200px]]
last1=Болатовна	first1=Якупова Джамиля	last2=Максутович	first2=Ахмеденов Кажмурат	date=2021	title=НОВЫЙ ВИД KAZAKHSTANOSAURUS EFIMOVI YAKUPOVA ET AKHMEDENOV SP. NOV. (ICHTHYOSAURIA, UNDOROSAURIDAE) ИЗ ВЕРХНЕЮРСКИХ ОТЛОЖЕНИЙ СРЕДНЕГО ПОВОЛЖЬЯ РОССИИ	url=https://cyberleninka.ru/article/n/novyy-vid-kazakhstanosaurus-efimovi-yakupova-et-akhmedenov-sp-nov-ichthyosauria-undorosauridae-iz-verhneyurskih-otlozheniy-srednego	journal=Ученые записки Казанского университета. Серия Естественные науки	volume=163	issue=2	pages=251–263	issn=2542-064X}}	Bolatovna & Makustovich	2021	Valid	Late Jurassic	Kazakhstan
Russia	Two species are known
Keilhauia	Delsett et al.	2017	Valid	Early Cretaceous	Norway	Can be distinguished from other ophthalmosaurids by the wide top end of the ilium and exceptionally short ischiopubis compared to the femur	[[File:Keilhauia Scale.svg	200px]]
last1=Cortés	first1=D.	last2=Maxwell	first2=E.E.	last3=Larsson	first3=H.C.E.	year=2021	title=Re-appearance of hypercarnivore ichthyosaurs in the Cretaceous with differentiated dentition: revision of 'Platypterygius' sachicarum (Reptilia:Ichthyosauria, Ophthalmosauridae) from Colombia	journal=Journal of Systematic Palaeontology	volume=19	issue=14	pages=969–1002	doi= 10.1080/14772019.2021.1989507	bibcode=2021JSPal..19..969C	s2cid=244512087	doi-access=free }}	Cortés et al.	2021	Valid	Early Cretaceous	Colombia	Formerly thought to represent a species of Platypterygius, but it was assigned to its own genus due to morphological differences	[[File:Kyhytysuka sachicarum FINAL.png	200px]]
author=Valentin Fischer	author2=Maxim S. Arkhangelsky	author3=Gleb N. Uspensky	author4=Ilya M. Stenshin	author5=Pascal Godefroit	author5-link=Pascal Godefroit	name-list-style=amp	year=2013	title=A new Lower Cretaceous ichthyosaur from Russia reveals skull shape conservatism within Ophthalmosaurinae	journal=Geological Magazine	volume=151	issue=1	pages=60–70	doi=10.1017/S0016756812000994	bibcode=2014GeoM..151...60F	doi-access=free }}	Fischer et al.	2013	Valid	Early Cretaceous	Russia	One of the latest-surviving ophthalmosaurines
last1=Qiao	first1=Y.	last2=Iijima	first2=M.	last3=Liu	first3=J.	title=A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China	journal=Journal of Systematic Palaeontology	year=2025	volume=23	article-number=2560884	doi=10.1080/14772019.2025.2560884 }}	Qiao, Iijima & Liu	2025	Valid	Early Triassic	China	Possessed unusually wide autopodia compared to other hupehsuchians	[[File:Lentamanusuchus (holotype, HFUT YZSB-19-100).png	200px]]
Leptocheirus	Merriam	1903	Jr. synonym	N/A	N/A	Junior synonym of Toretocnemus
Leptonectes	McGowan	1996	Valid	Late Triassic to Early Jurassic	Belgium
Germany
Spain
United Kingdom
(England)	One referred specimen reported from Switzerland has been found to actually belong to the related Hauffiopteryx	[[File:Leptonectes SW 1.png	200px]]
	Huene	1929	Jr. synonym	N/A	N/A	Junior synonym of Leptonectes
Macgowania	Motani	1999	Valid	Late Triassic	Canada	Originally misidentified as a species of Ichthyosaurus	[[File:Macgowania janiceps holotype (cropped).jpg	200px]]
Macropterygius	von Huene	1922	Dubious	Late Jurassic	United Kingdom
(England)	Several specimens have been assigned to this genus, but only the type, a single vertebra, can confidently be referred to it
last1=W. Maisch	first1=Michael	last2=T. Matzke	first2=Andreas	title=Magnipterygius huenei n. gen. n. sp., a new small stenopterygiid (Reptilia: Ichthyosauria) from the Posidonienschiefer Formation of SW Germany	journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen	date=2022	volume=303	issue=2	pages=169–201	doi=10.1127/njgpa/2022/1042	s2cid=246797718	url=https://www.researchgate.net/publication/358495106	access-date=10 February 2022}}	Maisch & Matzke	2022	Valid	Early Jurassic	Germany	Shares some features with Stenopterygius	[[File:Magnipterygius_huenei.png	200px]]
Maiaspondylus	Maxwell & Caldwell	2006	Valid	Early Cretaceous to Late Cretaceous	Canada
Russia
United Kingdom
(England)	One particular specimen proves this genus, just like other ichthyosaurs, was viviparous	[[File:Maiaspondylus.png	200px]]
author=Valentin Fischer	author2=Robert M. Appleby	author3=Darren Naish	author4=Jeff Liston	author5=James B. Riding	author6=Stephen Brindley	author7=Pascal Godefroit	name-list-style=amp	year=2013	title=A basal thunnosaurian from Iraq reveals disparate phylogenetic origins for Cretaceous ichthyosaurs	journal=Biology Letters	volume=9	issue=4	article-number=20130021	doi=10.1098/rsbl.2013.0021	pmid=23676653	pmc=3730615}}	Fischer et al.	2013	Valid	Early Cretaceous	Iraq	Relatively basal compared to other Cretaceous ichthyosaur taxa	[[File:Malawania.jpg	200px]]
Merriamia	Boulenger	1904	Jr. synonym	N/A	N/A	Junior synonym of Toretocnemus
Metashastasaurus	Nicholls & Manabe	2001	Jr. synonym	N/A	N/A	Junior synonym of Callawayia
last = Haaramo	first = Mikko	title = Ichthyosauria	work = Mikko's Phylogeny Archive	date=11 March 2008	url = http://www.helsinki.fi/~mhaaramo/metazoa/deuterostoma/chordata/reptilia/ichthyosauromorpha/ichthyosauria.html	access-date = 9 October 2008}}	Maisch & Matzke	1997	Jr. synonym	N/A	N/A	Junior synonym of Besanosaurus
Mixosaurus	Baur	1887	Valid	Middle Triassic	China
Italy
Switzerland	Various species have been named, but most have been considered doubtful or assigned to new genera	[[File:Mixosaurus cornalianus SW 1.png	200px]]
Mollesaurus	Fernández	1999	Valid	Middle Jurassic	Argentina	The oldest known ophthalmosaurid
Muiscasaurus	Maxwell et al.	2015	Valid	Early Cretaceous	Colombia	May have been a specialized predator that fed on small, soft prey
Myobradypterygius	von Huene	1927	Valid	Early Cretaceous	Argentina
Chile?	Once thought to be a species of Platypterygius
Myopterygius	von Huene	1922	Jr. synonym	N/A	N/A	Junior synonym of Platypterygius
Nanchangosaurus	Wang	1959	Valid	Middle Triassic	China	Its back carried bony scutes, not unlike an alligator	[[File:Nanchangosaurus.png	200px]]
Nannopterygius	von Huene	1922	Valid	Middle Jurassic to Early Cretaceous	Kazakhstan
Norway
Russia
United Kingdom
(England)	Similar to Ophthalmosaurus but with smaller flippers. Six species are recognized	[[File:Yasikovia2.jpg	200px]]
Omphalosaurus	Merriam	1906	Valid	Early Triassic to Middle Triassic	Austria
Norway
Poland
United States	Its bones were relatively fast-growing as evidenced by the presence of woven-fibered bone tissue	[[File:Omphalosaurus10DB.jpg	200px]]
last = Haaramo	first = Mikko	title = Ophthalmosauria	work = Mikko's Phylogeny Archive	date=11 March 2008	url = http://www.helsinki.fi/~mhaaramo/metazoa/deuterostoma/chordata/reptilia/ichthyosauromorpha/ophthalmosauria.html	access-date = 9 October 2008}}	Seeley	1874	Valid	Middle Jurassic to Late Jurassic	United Kingdom
(England)	Noted for its proportionally large eyes, which could measure between 22 - in diameter	[[File:Ophthalmosaurus icenicus updated reconstruction.png	200px]]
Otschevia	Efimov	1998	Jr. synonym	N/A	N/A	Junior synonym of Grendelius
Pachygonosaurus	von Huene	1916	Dubious	Middle Triassic	Poland	Only definitively known from two vertebrae	[[File:Pachygonosaurus vertebrae.png	200px]]
Palvennia	Druckenmiller et al.	2012	Valid	Late Jurassic	Norway	One study considered it to be a junior synonym of Arthropterygius, but this was not supported by later research
Panjiangsaurus	Chen & Chang	2003	Jr. synonym	N/A	N/A	author1=Shang Qing-Hua	author2=Li Chun	year=2009	title=On the occurrence of the ichthyosaur Shastasaurus in the Guanling Biota (Late Triassic), Guizhou, China	journal=Vertebrata PalAsiatica	volume=47	issue=3	pages=178–193	url=http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200909/P020090917531791680790.pdf}}
Parahupehsuchus	Chen et al.	2014	Valid	Early Triassic	China	Unlike other hupehsuchians, it possessed flat, wide ribs	[[File:Parahupehsuchus.png	200px]]
Paraophthalmosaurus	Arkhangelsky	1997	Jr. synonym	N/A	N/A	Junior synonym of Nannopterygius
Parrassaurus	Barrientos-Lara & Alvarado-Ortega	2021	Valid	Late Jurassic	Mexico	Relatively large for an ophthalmosaurid	[[File:Parrassaurus 01.jpg	200px]]
Parvinatator	Nicholls & Brinkman	1995	Valid	Early Triassic to Middle Triassic	Canada	The only known specimen has a badly damaged skull	[[File:Parvinatator reconstruction.png	200px]]
Pessopteryx	Wiman	1910	Valid	Early Triassic	Norway	Originally known from four species, but only the type can confidently be assigned to the genus
Pessosaurus	Wiman	1910	Valid	Middle Triassic	Norway	Two species have been described
Phalarodon	Merriam	1910	Valid	Middle Triassic	Canada
China
Germany
Norway
Switzerland?
United States	Mostly known from specimens consisting of cranial remains	[[File:Contectopalatus atavus.png	200px]]
Phantomosaurus	Maisch & Matzke	2000	Valid	Middle Triassic	Germany	Although it was closely related to Cymbospondylus, its braincase resembled more that of other diapsids than other ichthyosaurs	[[File:Phantomosaurus cf neubigi 3.jpg	200px]]
Platypterygius	von Huene	1922	Valid	Early Cretaceous to Late Cretaceous	Australia
Colombia
Germany
United States	Several species have been named, but most may not be diagnostic or belong to this genus	[[File:Platypterigius longmani DB.jpg	200px]]
Plutoniosaurus	Efimov	1997	Dubious?	Early Cretaceous	Russia	May be identical to Simbirskiasaurus
Proteosaurus	Home	1819	Jr. synonym	N/A	N/A	Junior synonym of Ichthyosaurus
Protoichthyosaurus	Appleby	1979	Valid	Early Jurassic	Switzerland?
United Kingdom
(England)	last1=Lomax	first1=D.R.	author-link=Dean Lomax	last2=Massare	first2=J.A.	last3=Mistry	first3=R.T.	name-list-style=amp	year=2017	title=The taxonomic utility of forefin morphology in Lower Jurassic ichthyosaurs: Protoichthyosaurus and Ichthyosaurus	journal=Journal of Vertebrate Paleontology	volume=37	issue=5	article-number=e1361433	doi=10.1080/02724634.2017.1361433	s2cid=90238537	url=https://www.research.manchester.ac.uk/portal/en/publications/the-taxonomic-utility-of-forefin-morphology-in-lower-jurassic-ichthyosaurs-protoichthyosaurus-and-ichthyosaurus(ff48fdc1-8ea2-4b7e-9d28-e6f55825130b).html}}	[[File:Protoichthyosaurus NT.png	200px]]
Qianichthyosaurus	Li	1999	Valid	Late Triassic	China	A relatively common component of its habitat, known from remains of both juvenile and pregnant individuals	[[File:Qianichthyosaurus.jpg	200px]]
Quasianosteosaurus	Maisch & Matzke	2003	Valid	Early Triassic	Norway	Had the largest skull of any Early Triassic ichthyosaur
Rachitrema	Sauvage	1883	Dubious	Late Triassic	France	Initially believed to be a dinosaur	[[File:Rachitrema.jpg	200px]]
Sangiorgiosaurus	Brinkmann	1998	Jr. synonym	N/A	N/A	Junior synonym of Mixosaurus
Sclerocormus	Jiang et al.	2016	Valid	Early Triassic	China	Unusually proportioned with a heavily built trunk, long tail, and small head	[[File:Sclerocormus_small.jpg	200px]]
Shastasaurus	Merriam	1895	Valid	Late Triassic	Canada?
China?
United States	A referred species, which was one of the largest marine reptiles, estimated at 21 m long, has been suggested by several analyses to belong to either this genus or Shonisaurus	[[File:Shastasaurus pacificus restoration.jpg	200px]]
Shonisaurus	Camp	1976	Valid	Late Triassic	United States	One of the largest ichthyosaurs yet known. State fossil of Nevada	[[File:Shonisaurus popularisDB.jpg	200px]]
Simbirskia	Otschev & Efimov	1985	Jr. synonym	N/A	N/A	Junior synonym of Platypterygius
Simbirskiasaurus	Otschev & Efimov	1985	Valid	Early Cretaceous	Russia	Closely related to Platypterygius
author=Valentin Fischer	author2=Nathalie Bardet	author3=Myette Guiomar	author4=Pascal Godefroit	name-list-style=amp	year=2014	title=High Diversity in Cretaceous Ichthyosaurs from Europe Prior to Their Extinction	journal=PLOS ONE	volume=9	issue=1	article-number=e84709	doi=10.1371/journal.pone.0084709	pmid=24465427	pmc=3897400	bibcode=2014PLoSO...984709F	doi-access=free }}	Fischer et al.	2014	Valid	Early Cretaceous	France
United Kingdom
(England)	Its discovery suggests a greater diversity of ichthyosaurs from Early Cretaceous Europe than previously thought	[[File:Sisteronia.png	200px]]
Stenopterygius	Jaekel	1904	Valid	Early Jurassic to Middle Jurassic	France
Germany
Luxembourg
Switzerland
United Kingdom
(England)	One well-known specimen proves that ichthyosaur infants were born tail-first, just like cetaceans, to prevent them from drowning before fully clearing the birth canal	[[File:Stenopterygius Horn Final.jpg	200px]]
Suevoleviathan	Maisch	1998	Valid	Early Jurassic	Germany	Had uniquely large forefins compared to other ichthyosaurs	[[File:Suevoleviathan SW 1.png	200px]]
Sumpalla	Campos et al.	2021	Valid	Late Jurassic	Argentina	Originally thought to be a specimen of Aegirosaurus	[[File:Artistic reconstruction of Sumpalla argentina.jpg	200px]]
Svalbardosaurus	Mazin	1981	Dubious	Early Triassic	Norway	Although initially described as an ichthyosaur, it was later suggested to be an amphibian
Sveltonectes	Fischer et al.	2011	Valid	Early Cretaceous	Russia	Its teeth have an unusual morphology
Temnodontosaurus	Lydekker	1889	Valid	Early Jurassic	Belgium
Chile?
France
Germany
Italy
Luxembourg
Switzerland
United Kingdom
(England)	Possibly had the largest eyes of any known animal, rivaling those of a colossal squid in size	[[File:Temnodontosaurus_BW.jpg	200px]]
Thaisaurus	Mazin et al.	1991	Valid	Early Triassic	Thailand	The first and fifth metacarpals are identical in size	[[File:Thaisaurus chonglakmanii 5.JPG	200px]]
author1=Megan L. Jacobs	author2=David M. Martill	year=2020	title=A new ophthalmosaurid ichthyosaur from the Upper Jurassic (Early Tithonian) Kimmeridge Clay of Dorset, UK, with implications for Late Jurassic ichthyosaur diversity	journal=PLOS ONE	volume=15	issue=12	article-number=e0241700	doi=10.1371/journal.pone.0241700	pmid=33296370	pmc=7725355	bibcode=2020PLoSO..1541700J	doi-access=free }}	Jacobs & Martill	2020	Valid	Late Jurassic	United Kingdom
(England)	May be closely related to Nannopterygius	[[File:Thalassodraco Scale.svg	200px]]
author=Nadia B. Fröbisch	author2=Jörg Fröbisch	author3=P. Martin Sander	author4=Lars Schmitz	author5=Olivier Rieppel	name-list-style=amp	year=2013	title=Macropredatory ichthyosaur from the Middle Triassic and the origin of modern trophic networks	journal=Proceedings of the National Academy of Sciences of the United States of America	volume= 110	issue= 4	doi=10.1073/pnas.1216750110	pages=1393–1397	pmid=23297200	pmc=3557033	bibcode=2013PNAS..110.1393F	doi-access=free }}	Fröbisch et al.	2013	Valid	Middle Triassic	United States	The apex predator of its ecosystem, filling an ecological role similar to orcas	[[File:Thalattoarchon saurophagis.jpg	200px]]
Tholodus	von Meyer	1851	Valid	Middle Triassic	China?
Germany
Italy
Mainly known from teeth and fragments of jaws	[[File:Tholodus schmidi mandible.jpg	200px]]
Toretocnemus	Merriam	1903	Valid	Late Triassic	Mexico
United States	Had very large eye sockets and narrow jugals	[[File:Toretocnemus NT.png	200px]]
Typicusichthyosaurus	Yin et al.	2000	Jr. synonym?	N/A	N/A	last1=Maisch	first1=M. W.	last2=Pan	first2=X. R.	last3=Sun	first3=Z. Y.	last4=Cai	first4=T.	last5=Zhang	first5=D. P.	last6=Xie	first6=J. L.	year=2006	title=Cranial osteology of Guizhouichthyosaurus tangae (Reptilia: Ichthyosauria) from the Upper Triassic of China	journal=Journal of Vertebrate Paleontology	volume=26	issue=3	pages=588–597	doi=10.1671/0272-4634(2006)26[588:COOGTR]2.0.CO;2	s2cid=129117115 }}
Undorosaurus	Efimov	1999	Valid	Late Jurassic	Norway
Poland
Russia	Can be distinguished from Ophthalmosaurus by characters of its ischiopubis and teeth	[[File:Ундорозавр (Ихтиозавр (Ichthyopterygia)) Музей палеонтологии. Ундоры. Ульяновская обл. Ноябрь 2013 - panoramio.jpg	200px]]
Utatsusaurus	Shikama et al.	1978	Valid	Early Triassic	Canada
Japan	The earliest known ichthyopterygian	[[File:Utatsusaurus_NT_new.png	200px]]
Wahlisaurus	Lomax	2016	Valid	Early Jurassic	United Kingdom
(England)	Its shoulder girdle is markedly different from that of Eurhinosaurus	[[File:Wahlisaurus NT small.jpg	200px]]
Wimanius	Maisch & Matzke	1998	Valid	Middle Triassic	Switzerland	Has been recovered in a variety of phylogenetic positions within the Hueneosauria	[[File:Wimanius Holotype.jpg	200px]]
Xinminosaurus	Jiang et al.	2008	Valid	Middle Triassic	China	Has been suggested to be synonymous with Tholodus
last1=Lomax	first1=Dean R.	last2=Massare	first2=Judy A.	last3=Maxwell	first3=Erin E.	date=2025-10-09	title=A new long and narrow-snouted ichthyosaur illuminates a complex faunal turnover during an undersampled Early Jurassic (Pliensbachian) interval	journal=Papers in Palaeontology	language=en	volume=11	issue=5	article-number=e70038	doi=10.1002/spp2.70038	issn=2056-2802	doi-access=free}}	Lomax, Massare & Maxwell	2025	Valid	Early Jurassic	United Kingdom
(England)	Probably closely related to Hauffiopteryx	[[File:Xiphodracon (holotype, ROM VP52596).jpg	200px]]
Yasykovia	Efimov	1999	Jr. synonym	N/A	N/A	Junior synonym of Nannopterygius

|- |}

References

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