Costa, 2011
Identity of Rivulus ocellatus and a new name for a hermaphroditic species of Kryptolebias from south-eastern Brazil (Cyprinodontiformes: Rivulidae)The study of morphological characters of the holotype of Rivulus ocellatus (= Kryptolebias ocellatus) revealed that K. caudomarginatus (Seegers) is a synonym of K. ocellatus. The species identified until now as K. ocellatus is redescribed as K. hermaphroditus, which is distinguished from all other species of the K. marmoratus group, which also includes K. ocellatus and K. marmoratus, by having a unique colour pattern. Available molecular data support K. hermaphroditus as a distinct species, more closely related to K. marmoratus than to other congeners. Kryptolebias hermaphroditus is only known from the coastal plains of south-eastern Brazil, in the states of Rio de Janeiro and São Paulo, and comprises only hermaphroditic individuals.
Wilson J. E. M. Costa
Ichthyological Exploration of Freshwaters, 22 (2): 185-192.