Rivulus kirovskyi, a new killifish from the central Amazon, Brazil (Cyprinodontiformes: Rivulidae)

This dataset contains the digitized treatments in Plazi based on the original journal article Costa, Wilson J. E. M. (2004): Rivulus kirovskyi, a new killifish from the central Amazon, Brazil (Cyprinodontiformes: Rivulidae). Neotropical Ichthyology 2 (1): 9-12, DOI: 10.1590/S1679-62252004000100002, URL: scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000100002&lng=en&tlng=en Rivulus kirovskyi, new species, from the central Amazon, lower rio Negro drainage, northern Brazil, is described.

It is a member of an assemblage that includes R. amanapira, R. atratus, R. ornatus, R. rectocaudatus, R. romeri, R. tecminae, and R. uakti, and is diagnosed by a unique pattern of frontal squamation and a derived color pattern of the infraorbital region. Relationships of the new species with other taxa of the group are unclear at the present. It is similar to R. atratus, R. ornatus, and R. romeri in having an apomorphic reduction of anal-fin rays and by the absence of caudal spot in females, and similar to R. amanapira, R. rectocaudatus, R. romeri, R. tecminae, and R. uakti, by the absence of preopercular canal and dermosphenotic.