Abdounia beaugei was a small early requiem-shark relative that lived in warm Palaeogene seas. Although its body is poorly known, its numerous small teeth show that it belonged to the carcharhinid radiation that would later become one of the most diverse groups of modern sharks.

Its pointed, smooth-edged teeth were suited to gripping rather than crushing or sawing. This suggests a small-predator role, probably taking fishes, crustaceans and other manageable marine prey. Tooth shape changed around the jaw, giving the animal a versatile grasping dentition.

The species is known mainly from isolated teeth, which are common enough to provide a useful picture of its dentition but reveal much less about its body form or behaviour. Its presence in the London Clay adds to the diversity of small and medium-sized predatory sharks sharing the early Eocene sea.