Named By: Jacques Amand Eudes-Deslongchamps - 1869.
Synonyms: Teleidosaurus joberti?, Teleosaurus calvadosii.
Classification: Chordata, Reptilia, Crocodylomorpha, Thalattosuchia, Metriorhynchoidea.
Species: T. calvadosii (type). T. joberti?
Known locations: France.
Time period: Bajocian of the Jurassic.
Fossil representation: Partial skull and post cranial remains, but the holotype was lost in World War 2.
is a genus of primitive form thalatosuchian marine
Originally named as a species of Teleosaurus,
established as a distinct genus in 1869, and was considered to
possibly be one of the oldest marine crocodiles until 2015 when the
was named. As a metriorhynchoid, Teleidosaurus
have been a marine crocodile, actively hunting in shallow sea
waters, though the genus was still considerably more primitive than
actual metriorhynchids which evolved much better adaptations for open
Two former species of Teleidosaurus, T. bathonicus and T. gaudryi have been used to create the genus Eoneustes. In addition one remaining species, T. joberti, has been considered by some to be synonymous with the type species T. calvadosii, though some authors continue to separate them at the time of writing.
- Description d'une espèce inédite de Téléosaure des environs de Caen, le Teleosaurus calvadosii. Bulletin Society Linnean Normandie 2 (1): 112-118. - 1866.
- Notice sur les animaux fossiles de la famille des Téléosauriens recueillis en Normandie. Mémoires Academy Imperial Sciiences et Arts et Belles-Lettres: 31-80. - Jacques Amand Eudes-Deslongchamps - 1869.
- The evolution of Metriorhynchoidea (Mesoeucrocodylia, Thalattosuchia): an integrated approach using geometrics morphometrics, analysis of disparity and biomechanics. - Zoological Journal of the Linnean Society 158 (4): 801–859. - Mark T. Young, Stephen L. Brusatte, Marcello Ruta & Marco Brandalise de Andrade - 2010.