Dolichosauridae

Tetrapodophis (Greek meaning "four-footed snake") is an extinct genus of lizard from the Early Cretaceous (Aptian) aged Crato Formation of Brazil. It has an elongated snake-like body, with four disproportionately short limbs. The species is known from one fossil specimen.

Kaganaias (meaning 'Kaga water nymph') is an extinct genus of basal and oldest dolichosaur that lived in what is now Japan during the Early Cretaceous. Kaganaias was semi-aquatic and is the only known aquatic squamate from before the Cenomanian stage of the Cretaceous. It is also the first to be found in an inland area, instead of on the coast where aquatic squamates are commonly found. Its generic name is derived from Kaga Province, the old name for the Ishikawa Prefecture where the specimens were found, while the species name hakusanensis comes from the mountain that gives its name to Hakusa

Dolichosaurus (meaning "long lizard") is an extinct genus of marine squamate of the Upper Cretaceous Cenomanian chalk deposits of England. It was described and named by Owen in 1850. It is a member of the family Dolichosauridae. It was a small reptile measuring long. It had an elongate neck resulting from an increased number of cervical vertebrae.

Dolichosauridae (from Latin, dolichos = "long" and Greek sauros= lizard) is a family of Cretaceous aquatic lizards. They are widely considered to be the earliest and most primitive members of Mosasauria, though some researchers have recovered them as more closely related to snakes.

Coniasaurus is an extinct genus of Late Cretaceous marine squamates that range in age from Cenomanian to Santonian. It was first described by Richard Owen in 1850 from lower Cenomanian chalk deposits in South East England (Sussex). Two species have been described from this genus: C. crassidens (Owen, 1850), known from Cenomanian to Santonian deposits from South East England, Germany and North America, and C. gracilodens (Caldwell, 1999) from the Cenomanian of southeast England.

thumb|left|220px|Head of Pontosaurus kornhuberi Pontosaurus is a now extinct genus of pythonomorph from the Late Cretaceous period. The type species, P. lesinensis, is from Hvar in Croatia. It was originally named Hydrosaurus lesinensis and placed in the genus Hydrosaurus Wagler, 1830, which is preoccupied by the agamid genus Hydrosaurus Kaup, 1828, and now considered a synonym of Varanus, but later placed in a separate genus Pontosaurus. A second species, P. kornhuberi, is known from the Sannine Formation in Lebanon.