Phylogenetic position and tentative generic placement for Cyprinodon martae STEINDACHNER, 1875 (Teleostei: Cyprinodontiformes), a killifish from northern Colombia

Examination of photographs and a radiograph of the holotype of Cyprinodon martae, a rare killifish from coastal northern Colombia, revealed that it is not a rivulid by not exhibiting any diagnostic apomorphic condition of the Rivulidae, as well as the character states diagnosing the suborder Aplocheiloidei are not present. On the other hand, besides possessing many characters common among cyprinodontoids but not found among aplocheiloids, it has diagnostic features of the suborder Cyprinodontoidei, such as neural and hemal spines of the preural vertebrae 3 distinctively wider than those spines of the anterior vertebrae. These characters associated to the jaw dentition morphology unambiguously support its inclusion among the Cyprinodontidae, whereas the presence of an enlarged supraoccipital crest strongly suggests that is a member of the Caribbean killifish genus Cubanichthys.