Discovery of a specialist Copelatinae fauna on Madagascar: highly ephemeral tropical forest floor depressions as an overlooked habitat for diving beetles (Coleoptera, Dytiscidae) Author Ranarilalatiana, Tolotra Author Bergsten, Johannes text ZooKeys 2019 871 89 118 http://dx.doi.org/10.3897/zookeys.871.36337 journal article http://dx.doi.org/10.3897/zookeys.871.36337 1313-2970-871-89 56C3FB7DAF714C1B8BD108417883D624 Copelatus Erichson, 1832 Remark. Twenty-five species of Copelatus are currently known from Madagascar. All species except those in the erichsonii group were recently revised by Ranarilalatiana et al. (in press) . The three species described below all belong to the erichsonii species group with ten discal and one submarginal elytral striae. Type materials of all erichsonii group species described from Madagascar have been examined in the ongoing second part of the revision.