Re‐establishment of the genus Monostichodus Vaillant 1886 ( C haraciformes, D istichodontidae)

Pellegrin rejected the validity of Monostichodus elongatus , described by Vaillant and type species of the genus Monostichodus , based on the lack of a proper species description, and redescribed Vaillant's specimens as Hemistichodus vaillanti . After review of the relevant articles in the International Code of Zoological Nomenclature, however, no arguments were found to consider M. elongatus as a nomen nudum . This implies that Hemistichodus should be considered as a junior synonym of the genus Monostichodus , which includes three valid species: M. elongatus (with Hemistichodus vaillanti as a junior synonym), M. mesmaekersi and M. lootensi .