The taxon comprises 1 species, Leptosomus discolor, in the family Leptosomidae. 

Traditional genus-level classification of extant Leptosomiformes, following AviList checklist v2025. (link) The number of subspecies is given in parentheses. 

References

Mayr G (2008), The Madagascan "Cuckoo-Roller" (Aves: Leptosomidae) is not a roller - notes on the phylogenetic affinities and evolutionary history of a  "living fossil", Acta Ornithol. 43, 226-230. (abstract)