Redescription of Kryptolebias ocellatus (Hensel) and K. caudomarginatus (Seegers) (Teleostei: Cyprinodontiformes: Rivulidae), two killifishes from mangroves of south-eastern Brazil

Wilson J. E. M. Costa

aqua, International Journal of Ichthyology, pp. 5-12, Volume 11, Issue 1 – 1 February 2006


Taxonomy of Kryptolebias ocellatus (Hensel) and K. caudomarginatus (Seegers) has been poorly defined and mostly based on a few specimens bred in aquaria. They are considered valid species and are redescribed based on recent collections in the type locality area, the mangroves of Rio de Janeiro state, south-eastern Brazil. Both species are considered closely related to K. marmoratus (Poey), with which they share the presence of four neuromasts on the posterior supraorbital series, a long anterior nostril, and a bony laminar ventral process on the fifth ceratobranchial; K. ocellatus is distinguished by a unique colour pattern in the hermaphrodite, more slender caudal peduncle, and a shorter pelvic fin, and K. caudomarginatus by possessing more vomerine teeth, longer dorsal fin base, and a unique male colour pattern. The type locality of K. caudomarginatus is coorrected.

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