The Hadziidae

The hadziids are a clade of freshwater amphipods with a limited global distribution. Morphologically they are scarcely separable from the Maeridae that are a worldwide marine group. The main distingushing characters of the Hadziidae are the double row of robust setae along the palm of gnathopod 1 and 2 that are not present in maerids and the absence of a posteroventral lobe on coxa 4, present in maerids.