EN
Re-examination of the type-material of Mesocyclops iranicus Lindberg, 1936 revealed that this species has to be considered as a junior synonym of the widely distributed M. aspericornis (Daday, 1906). Some observations on the micromorphology are presented, and a list of the type-materials of the species described from Iran by Lindberg in 1936 and which he deposited in the collections of the Recent Invertebrate Section is given.