Diagnosis. Species of Psolidae with large imbricating or contiguous dorsal and lateral scales; ventro-lateral scales at margin clearly demarcated from thin sole that lacks conspicuous scales; tube feet absent dorsally and laterally, except sometimes present orally and anally.
Remarks. In their key to genera of Psolidae, O’Loughlin & Maric 2008 stated that the conspicuous dorsal and lateral scales of species of Psolus lacked calcareous towers. A close dorsal and lateral cover of apically spinous towers on the scales is the diagnostically distinctive character of one of the new species described below. The diagnosis in O’Loughlin & Maric 2008 has been appropriately emended here.