Epeorus (Caucasiron) longimaculatus, larva: A habitus in dorsal view B habitus in ventral view C habitus in lateral view D head of male in dorsal view E head of female in dorsal view F–H middle leg in dorsal view I–K abdominal terga L, M gills VII (in natural position from ventral view) N–P abdominal sterna II–VI.