Early Jurassic ichthyosaurs

Ichthyosaurus (derived from Greek () meaning 'fish' and () meaning 'lizard') is a genus of ichthyosaurs from the Early Jurassic (Hettangian - Pliensbachian) of Europe (Belgium, England, Germany and Portugal). 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.

Temnodontosaurus (meaning "cutting-tooth lizard") is an extinct genus of large ichthyosaurs that lived during the Lower Jurassic in what is now Europe and possibly Chile. The first known fossil is a specimen consisting of a complete skull and partial skeleton discovered on a cliff by Joseph and Mary Anning around the early 1810s in Dorset, England. The anatomy of this specimen was subsequently analyzed in a series of articles written by Sir Everard Home between 1814 and 1819, making it the very first ichthyosaur to have been scientifically described. In 1822, the specimen was assigned to the g

Stenopterygius is an extinct genus of thunnosaur ichthyosaur known from Europe (England, France, Germany, Luxembourg and Switzerland).

Eurhinosaurus (Greek for 'well-nosed lizard'; eu- meaning 'well or good', rhino- meaning 'nose' and -saurus meaning 'lizard') is an extinct genus of ichthyosaur from the Early Jurassic (Toarcian), ranging between 183 and 175 million years. Fossils of this genus have been found across Western Europe, such as in England, southern and northern Germany, the Benelux, France and Switzerland.

thumb|right|L. tenuirostris, Royal Ontario Museum thumb|right|Life restoration Leptonectes is a genus of ichthyosaur that lived in the Late Triassic to Early Jurassic (Rhaetian - Pliensbachian). Fossils have been found in Belgium, Germany, Spain and the United Kingdom. A possible specimen from Switzerland first reported in 2006, has been reclassified as that of Hauffiopteryx. The type species, L. tenuirostris, reached long, whereas L. moorei (NHMUK PV R 14370) likely reached long; the largest species, L. solei, was approximately long.

Excalibosaurus (meaning "Excalibur's lizard") is a monotypic genus of marine prehistoric reptiles (ichthyosaurs) that lived during the Sinemurian stage (approximately 199.5 ± 0.3 Ma to 192.9 ± 0.3 Ma (million years ago)) of the Early Jurassic period in what is now England. It is characterized by the extreme elongation of the rostrum, with the lower jaw about three-quarters the length of the upper jaw, giving the animal a swordfish-like look. The only known species is Excalibosaurus costini.

Ichthyosauridae is an extinct family of thunnosaur ichthyosaurs from the latest Triassic and Early Jurassic (Rhaetian to Pliensbachian stages) of Europe, and possibly also from the middle Early Cretaceous (Hauterivian or Barremian stage) of Iraq. Named by Charles Lucien Bonaparte, in 1841, it is usually thought to contain a single genus, Ichthyosaurus, which is known from several species from the Early Jurassic. In 2013, Fischer et al. named and described Malawania anachronus from the middle Early Cretaceous of Iraq. It was found to share several synapomorphies with the type species of this fa

Hauffiopteryx is an extinct genus of ichthyosaur known from Germany, Luxembourg, Switzerland and Somerset of the United Kingdom. Two species are known: H. typicus and H. altera.

Suevoleviathan is an extinct genus of primitive ichthyosaur found in the Early Jurassic (Toarcian) of Holzmaden, Germany.

Wahlisaurus is an extinct genus of leptonectid ichthyosaur from the Scunthorpe Mudstone of England.' The type species is Wahlisaurus massarae''', and two specimens have been found: the first consisting of a skull and an incomplete skeleton, and the second a single coracoid.

Protoichthyosaurus is a genus of ichthyosaur from the early Jurassic of southern England and possibly Switzerland. Two species are known, P. prostaxalis—the type species, named by Appleby in 1979—and P. applebyi. A third species, P. prosostealis, was named by Appleby, but it was removed from the genus in 2017 due to its similarity to Ichthyosaurus. The genus Protoichthyosaurus was synonymized with Ichthyosaurus by Maisch and Hungerbuhler in 1997, and again by Maisch and Matzke in 2000. However, it was found to be distinct in 2017 by Dean Lomax and colleagues, who separated it from Ichthyosauru

Magnipterygius is an extinct genus of primitive ichthyosaur found in the Early Jurassic (Lower Toarcian) Posidonia Shale of Dotternhausen, Germany. The holotype specimen is SMNS96922, a nearly complete articulated skeleton. This genus is well known as a small-sized ichthyosaur, of around length, making it the second genus of that size after the Triassic. Due to the similarities with the genus Stenopterygius it has been classified as a member of the family Stenopterygiidae.