Description

SINGLE PAPER

Volume 8, Issue 3 – June 2004

Wilson J. E. M. Costa: Rivulus simplicis n. sp. (Cyprinodontiformes: Rivulidae): a new killifish from the coastal plains of south-eastern Brazil, pp. 103-108

Abstract

Rivulus simplicis, is described from a small, isolated coastal plain area of south-eastern Brazil. It belongs to the R. santensis species group, which also includes R. depressus, R. haraldsiolii, R. janeiroensis, R. luelingi, R. nudiventris, and R. santensis, and is diagnosed among rivulids by uniquely possessing a curved ventral process of the angulo-articular bone. Rivulus simplicis differs from other species of the R. santensis group in having a distinct colour pattern of flank and caudal fin in males, and by a combination of morphological features, including high number of caudal fin rays and anterior position of the dorsal fin origin.