Fig. 2

Diversities of Recent Ophiacanthidae, Ophioleucinae, Ophiozonella and Ophiomusium-like forms (see text for details), indicated as a percentage of the total diversity per group, along the depth gradient, together with depth ranges of Recent species of Ophiotholia (abbreviated ‘O.’; grey bars at the bottom of the graph). Depth ranges compiled from Litvinova (1992) for Ophiotholia and from respective original species descriptions [see Stöhr and O’Hara (2007) for a complete list] for other taxa