Island No.ofspecies recorded No.ofisland-endemic species References Palawan 15 12 [3,4] Luzon* 4 2 [5] Mindoro* 9 6 [6,7] Singapore 7 3 [9] Taiwan 13 12 (13) [10,14]

Table 1: Island endemism of Hydraena species in several Southeast Asian islands and Taiwan: total number of species including published records of still undescribed species, number of island endemic species and taxonomic references. * = more undescribed material available at NMW, ADMU and other scientific collections that was not treated in any publication yet and which is not included herein.