Early Cretaceous reptiles of Australia

Kronosaurus ( ) is an extinct genus of large short-necked pliosaur that lived during the Aptian to Albian stages of the Early Cretaceous in what is now Australia. The first known specimen was received in 1899 and consists of a partially preserved mandibular symphysis, which was first thought to come from an ichthyosaur according to Charles De Vis. However, it was in 1924 that Albert Heber Longman formally described this specimen as the holotype of an imposing pliosaurid, to which he gave the scientific name K. queenslandicus, which is still the only recognized species nowadays. The genus name,

Leptocleidus is an extinct genus of plesiosaur, belonging to the family Leptocleididae. It was a small plesiosaur, measuring only up to in length.

Umoonasaurus is an extinct genus of plesiosaur belonging to the family Leptocleididae. This genus lived approximately 115 million years ago during the Early Cretaceous period (Aptian-Albian stages), in shallow seas covering parts of what is now Australia. It was a relatively small animal around long. An identifying trait of Umoonasaurus is the presence of three crest-ridges on its skull.

Isisfordia is an extinct genus of crocodyliform closely related to crocodilians that lived in Australia during the Middle Cretaceous (Albian–Cenomanian).

Eromangasaurus is an extinct genus of elasmosaurid known from northern Queensland of Australia.

Woolungasaurus ('Woolunga lizard', named after an Aboriginal mythical reptile, Persson 1960) is a dubious genus of plesiosaur, an extinct marine reptile, belonging to the Elasmosauridae.

Mythunga is a potentially dubious genus of anhanguerid pterosaur from the late Early Cretaceous of Australia. Fossil remains of Mythunga dated back to the Albian stage of the Early Cretaceous, and the animal itself was found to be a close relative of another Australian anhanguerid called Ferrodraco.

Opallionectes andamookaensis (meaning "the opal swimmer from Andamooka") is the name given to a 5 m (16 ft) long cryptoclidian plesiosaur, which is thought to have lived during the early Cretaceous period (Lower middle Aptian), 115 million years ago, in shallow seas covering what is now Australia.

Aussiedraco is a genus of targaryendraconian pterodactyloid pterosaur from the early Cretaceous of Australia.

Haliskia (meaning "sea phantom") is an extinct genus of anhanguerian pteranodontoid pterosaurs from the Early Cretaceous Toolebuc Formation (Eromanga Basin) of Australia. The genus contains a single species, H. peterseni, known from a partial skeleton with skull. Haliskia represents the most complete pterosaur known from Australia.

Eiectus is a potentially valid genus of extinct short-necked pliosaur that lived in the Early Cretaceous period. Fossil material has been recovered from the Wallumbilla Formation (Aptian) of Queensland was initially classified under the related genus Kronosaurus until 2021.