In Depth Brachypterygius initially started out as a species of Ichthyosaurus, I. extremus, but in 1922 palaeontologist Friedrich von Huene renamed the species as a distinct genus. This is actually a reflection of how the Ichthyosaurus genus was once used as a wastebasket taxon with almost any ichthyosaur remains being referred to it upon the … Read more
In Depth Undorosaurus is a genus of ichthyosaur which lived in the late Jurassic seas of what is now Russia. For a time Undorosaurus was speculated to be synonymous with Ophthalmosaurus, but today Undorosaurus is regarded by all to be a distinct genus, though one that is related to Ophthalmosaurus. Further Reading - A new … Read more
In Depth Although named in 1999, Mollesaurus got declared as a synonym to Ophthalmosaurus in the following year by a review of the Ophthalmosaurus genus by palaeontologists Michael W. Maisch and Andreas T. Matzke in 2000. This conclusion remained for about ten years until 2010 when a further study by Patrick S. Druckenmiller and Erin … Read more
In Depth Parrassaurus is a genus of ichthyosaur that lived in waters around Mexico during the late Jurassic. Further reading - A new Tithonian ophthalmosaurid ichthyosaur from Coahuila in northeastern Mexico. - Alcheringa: An Australasian Journal of Palaeontology.. - Jair Israel Barrientos & Jes�s Alvarado-Ortega - 2021.
In Depth Originally described as a species of Ophthalmosaurus (O. chrisorum) a 2010 study saw the specimens elevated to the level of a distinct genus of ichthyosaur. Arthropterygius was also considered to be similar to Caypullisaurus, but not all researchers have followed this and instead treat Arthropterygius as a basal (primitive) member of the Ophthalmosauridae. … Read more
In Depth Acuetzpalin is a genus of ichthyosaur that lived in waters around what is now central America during the late Jurassic. Further Reading - Acuetzpalin carranzai gen et sp. nov. A new ophthalmosauridae (Ichthyosauria) from the Upper Jurassic of Durango, North Mexico. - Journal of South American Earth Sciences. - J. I. Barrientos-Lara, J. … Read more
In Depth Originally named as a species of Icthyosaurus by Wagner in 1853, Aegirosaurus was raised as a distinct genus by Bardet & Fernandez some one hundred and forty-seven years later. This is in part down to the wastebasket taxon effect, a common practice in the nineteenth century that saw similar prehistoric animals grouped together … Read more
In Depth Sisteronia is a genus of ophtahlmosaurid ichthyosaur that lived in European seas during the end of the early Cretaceous to perhaps into the early part of the late Cretaceous. Further Reading - High diversity in Cretaceous ichthyosaurs from Europe prior to their extinction. - PLoS ONE 9(1):e84709. - V. Fischer, N. Bardet, M. … Read more
In Depth Keilhauia is a genus of opthalmosaurid ichthyosaur that lived during the early Cretaceous. Though only known from partial remains, Keilhauia shares many similarities to the genera Cryopterygius and Caypullisaurus. Further Reading - A new ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and evolution of the ichthyopterygian pelvic girdle. - PLoS ONE 12(1):e0169971. - L. L. … Read more
In Depth The first specimen of Acamptonectes was discovered in 1958 from the Speeton Clay Formation, but was never officially described. A second specimen from this formation was recovered in 1985. Early interpretations of Acamptonectes led to the conclusion that it was similar to Platypterygius, but a new discovery from Germany in 2003 was found … Read more