Definitions

1. noun

a clade of archosaurs that includes modern crocodilians, their extinct relatives, and their extinct relatives’ closest extinct relatives, which includes the ancestors of birds.

“The discovery of eusuchians in the fossil record has greatly enhanced our understanding of their evolution and diversification.”

2. noun

a group of reptiles including crocodiles, alligators, and their extinct relatives.

“The eusuchians are a diverse group of reptiles that have adapted to various aquatic and terrestrial environments.”