Tylosaurinae

Tylosaurinae is a subfamily of plesiosaurids, a group of marine reptiles that lived during the Mesozoic era, from the Late Triassic to the Late Cretaceous period. The subfamily is characterized by its elongated necks and robust bodies, which were adapted for a semi-aquatic lifestyle. Tylosaurines are known for their distinctive features, including a long, narrow snout and a large, tooth-filled mouth, which was likely used for crushing prey.

The most well-known genus within Tylosaurinae is Tylosaurus, which is often referred to as the "pliosaur of the Jurassic." Tylosaurus had a long, slender neck and a robust body, with a large, tooth-filled mouth. It is believed to have been a carnivorous predator, feeding on a variety of marine creatures.

Another notable genus within Tylosaurinae is Cryptoclidus, which is known for its distinctive, club-like teeth. Cryptoclidus had a shorter neck and a more robust body than Tylosaurus, and it is believed to have been a scavenger or opportunistic feeder.

Tylosaurines are believed to have gone extinct around the same time as the non-avian dinosaurs, around 66 million years ago. The exact cause of their extinction is not known, but it is believed to have been related to the catastrophic events that occurred at the end of the Cretaceous period, including a massive asteroid impact and widespread volcanic activity.