(subclass Pterygota, order Coleoptera)
Family of small, black or bronze beetles about 3 mm long, which are generally found on water plants. The maxillary palps are long. The antennae have three-segmented clubs. Formerly the family was included in the Hydraenidae, but there are essential structural differences. Little is known of the larvae. There are 69 species.
Subjects: Zoology and Animal Sciences.