Uniting what belongs together—Reevaluation of the isopod species Macrostylis grandis and M. ovata using ontogenetic, morphological and genetic evidence

Solid taxonomy is the primary basis for many further-reaching studies in biology, such as biogeography. Here we reevaluate the taxonomic status of two species of the isopod crustacean family Macrostylidae Hansen, 1916, Macrostylis grandis Birstein, 1970 and M. ovata Birstein, 1970. Although they differ significantly in size and other morphological characteristics they share, amongst other character states, an oval habitus which makes them stand...