mesoeucrocodylians

Mesoeucrocodylia is a major clade of crocodylomorphs that encompasses all living crocodilians and their extinct relatives. This group diverged from other crocodylomorphs during the Late Triassic or Early Jurassic periods. Mesoeucrocodylians are characterized by a specific set of anatomical features, including a more advanced predatory adaptation in their jaws and skulls, and a generally more terrestrial or semi-aquatic lifestyle compared to some earlier crocodylomorphs.

The Mesozoic era saw a significant diversification of mesoeucrocodylians. Many extinct forms were quite different from modern crocodiles and alligators. Some were small and slender, while others were large and robust, with varying degrees of adaptations for aquatic or terrestrial life. Notable extinct mesoeucrocodylian groups include the Dyrosauridae, a diverse group of largely marine crocodylians that flourished after the extinction of the dinosaurs, and the Goniopholidae, which were common in the Jurassic and Cretaceous periods.

The clade Mesoeucrocodylia includes the most successful and widespread crocodylomorphs. Their ecological success is evident in their long evolutionary history, surviving multiple mass extinction events. Modern crocodilians, which represent the sole surviving lineage of mesoeucrocodylians, are a testament to the adaptability and resilience of this ancient group, continuing to occupy important predatory roles in freshwater and marine ecosystems around the world.