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A small family within the Clavicornia, the members of which have been historically assigned to a number of families. They bear a superficial resemblance to Cryptophagidae due to their elongate shape. The disc of the pronotum has a longitudinal line each side between the centre line and the margins marked by hairs or punctures. Tarsi 5-segmented, the first four segments small and about equal; last segment much longer; segments two and three clearly lobed.