Aplocheiloidei

Aplocheiloidei is a suborder of the order Cyprinodontiformes consisting of three families which are commonly known as killifishes.

Families

The three families within the suborder Aplocheiloidei are:

Aplocheilidae Bleeker, 1859
Nothobranchiidae Garman, 1895
Rivulidae Myers, 1925

The only known fossil member of the suborder is the Late Miocene-aged Kenyaichthys from the Lukeino Formation of Kenya, which is the only known member of the family Kenyaichthyidae Altner & Reichenbacher, 2015.

Proposed taxonomy

Some authorities have lumped the three families into a single family, Aplocheilidae, a well-established name, chosen for its stability in usage over time, and to avoid the impact of a new name at the family rank for a popular aquarium fish group. Under this proposal, the Aplocheilidae includes three subfamilies: Aplocheilinae for the species from Asia, Madagascar and the Seychelles; Cynolebiinae for the species from the Americas; and Nothobranchiinae for the species from the African mainland.