W. J. E. M. Costa, 2008
Atlantirivulus, a new subgenus of the killifish genus Rivulus from the eastern Brasilian coastal plains (Teleostei: Cyprynodontiformes: Rivulidae)Abstract
Atlantirivulus, a new subgenus of Rivulus Poey, is described to include a well defined, geographically isolated species assemblage, endemic to eastern Brasil, formerly known as the Rivulus santensis species group. It includes eigth species, all inhabiting Atlantic forest habitats: R. santensis Köhler, the type species of the new subgenus, R. depressus Costa, R. haraldsiolii Berkenkamp, R. janeiroensis Costa, R. lazzarotoi Costa, R. luelingi Seegers, R. nudiventris Costa & Brasil, and R. simplicis Costa. Atlantirivulus is diagnosed by a curved ventral process of angulo-articular and infraorbital neuromasts numerous, arranged in a zigzag pattern, morphological features that are unique among aplocheiloid fishes.
Filipe P. Ottoni, Osvaldo T. Oyakawa & Wilson J. E. M. Costa
Vertebrate Zoology 58 (1) 2008