Three new Malagasy species of Xyrodromeus (Ephemeroptera: Baetidae) with the first generic description of the adults

Abstract

The genus Xyrodromeus Lugo-Ortiz & McCafferty includes Afrotropical species of Baetidae (Ephemeroptera) with bladelike mandibles. Three new species of Xyrodromeus, X. modestus, X. latipalpus and X. sartorii, are described from the larval stage and the male imago of Xyrodromeus namarona Lugo-Ortiz & McCafferty is described from reared material. The knowledge of the imaginal stage greatly clarifies the systematic position of the genus Xyrodromeus. A key to larvae of the Malagasy species of Xyrodromeus is included.