Angustidontidae
Angustidontidae is an extinct family of eucarid crustaceans and the sole representatives of the order Angustidontida. They were predators ranging in size from about 4 to 9 centimetres in length and lived during the Late Devonian and Early Carboniferous periods.
They were some of the earliest Eucarids to develop maxillipeds, modified from the first or second thoracopods.
