Rimasuchus is an extinct genus of crocodile from the Neogene period of Africa and the Middle East. Its name comes from the Latin words rima, meaning "crack" (referencing the East African rift valley where it was discovered) and suchus, which means "crocodile". Rimasuchus is a member of the subfamily Crocodylinae, which includes over 20 species, eight of which are extinct. The type and only species, Rimasuchus lloydi, lived alongside other crocodiles such as the Nile crocodile. It preyed on large mammals, including early humans.