Hydroporus neclae sp. n. from north-eastern Turkey, a new member of the memnonius -group of Hydroporus Clairville (Coleoptera: Dytiscidae)

Hydroporus neclae sp.n. is described from the Erzurum province in north-eastern Turkey. The species belongs to the Hydroporus memnonius-group. Its habitus and the shape of the median lobe are similar to those of H. longicornis Sharp, but the shape of the hind margins of the metacoxal processes are similar to those of H. melanarius Sturm. The male and female genitalia as well as several other characters of H. neclae sp.n. are figured and compared with those of these two other species. The key to species of the memnonius-group given in Fery (1999) is modified to include the new species and the relevant parts are presented.