Generic review and key to all Afrotropical genera of the subfamily Elminae (Coleoptera: Elmidae)

A comprehensive review of the Afrotropical Elminae is presented herein, encompassing 23 genera: Aspidelmis, Ctenelmis, Elmidolia, Elpidelmis, Eumicrodinodes, Exolimnius, Helminthocharis, Helminthopsis, Lathridelmis, Leielmis, Leptelmis, Lobelmis, Ludyella, Microdinodes, Pachyelmis, Peloriolus, Pseudancyronyx, Pseudelmidolia, Pseudomacronychus, Sphragidelmis, Stenelmis, Trachelminthopsis, Tropidelmis and three subgenera: Elmidoliana, Paractenelmis, Paramicrodinodes. The characteristics of all taxa are included, photographs of the dorsal habitus, dorsolateral habitus, pronotum, prosternum, and tarsal claw are provided for most genera. Additional information on similar genera, larval descriptions, distribution, and known species is supplied for each taxon. A differential key to all 26 taxa is also presented, along with new country records for eight genera. Several genera exhibit considerable variability, and a revision to assess their monophyly is recommended.