Parrassaurus

{{Short description|Extinct genus of marine reptile}}

{{distinguish|Parasaurus|Parasaurolophus}}

{{Automatic taxobox

| name = Parrassaurus

| fossil_range = {{fossilrange|Tithonian}}

| image = Parrassaurus 01.jpg

| image_caption = Fossil in Museo de la Evolución, Puebla.

| taxon = Parrassaurus

| authority = Barrientos-Lara and Alvarado-Ortega, 2021

| type_species = {{extinct}}Parrassaurus yacahuitztli

| type_species_authority = Barrientos-Lara and Alvarado-Ortega, 2021

}}

Parrassaurus is an ophthalmosaurid ichthyosaur from the late Jurassic La Caja Formation of Mexico named in 2021. Parrassaurus includes one species, Parrassaurus yacahuitztli.Barrientos-Lara, J. I.; Alvarado-Ortega, J. (2021). "A new Tithonian ophthalmosaurid ichthyosaur from Coahuila in northeastern Mexico". Alcheringa: An Australasian Journal of Palaeontology. in press. doi:10.1080/03115518.2021.1922755. The type specimen (CPC 307) was around {{convert|5|m|ft}} long.{{cite journal|author1=Marie–Céline Buchy|author2=José Guadalupe López Oliva|year=2009|title=Occurrence of a second ichthyosaur genus (Reptilia: Ichthyosauria) in the Late Jurassic Gulf of Mexico|journal=Boletín de la Sociedad Geológica Mexicana|volume=62|issue=2|page=233-238|doi=10.18268/BSGM2009V61N2A11|s2cid=54774650|issn=1405-3322|doi-access=free|bibcode=2009BoSGM..61..233B }}