Rhyacophila denticulata, McLachlan, 1879

Synonyms of Rhyacophila denticulata and Rhyacophila sociata

Rhyacophila gemella Navás 1923 is a synonym of R. sociata Navás 1916 ( Valladolid et al. 2018). In our publication about R. fasciata ( Valladolid et al. 2021) View in CoL we concluded that the species Rhyacophila coppai Oláh 2020 and Rhyacophila soreda Coppa & Oláh 2020 are synonyms of R. sociata , and the species Rhyacophila kopasa Oláh & Coppa 2020 and Rhyacophila rova Oláh & Coppa 2020 are synonyms of R. denticulata . Oláh et al. (2020) described these new species, based on only a few (often only one) specimens, mainly males, using a very general morphology of specimens (colour), mostly preserved in ethanol for a long time, and some characteristics of males (shapes of parameres and presence of microtrichial bands) that are difficult to see if you observe them with only a dissecting microscope instead of with a compound microscope. The differences observed between R. coppai , R. soreda and R. sociata , and between R. kopasa , R. rova and R. denticulata are minimal, and could be included within the intraspecific variablity. Finally, the localities where the specimens were collected are included in the area of distribution of R. denticulata and R. fasciata View in CoL . We think it should be necessary to base new descriptions of species on more characters, more specimens, and DNA information. In our studies, DNA information shows that by now, there are only two species of the Complex in this area, R. denticulata and R. sociata .