Diving beetles (Coleoptera: Dytiscidae, Noteridae) of the southwestern Anatolia Region of TurkeyAbstract : Thirty species of Dytiscidae and one species of Noteridae were collected from 80 sampling stations in various aquatic habitats of the southwestern Anatolian region of Turkey (provinces of Antalya, Aydın, Afyon, Burdur, Denizli, Isparta and Muğla) between 2000 and 2002. Species distributions within Turkey are presented as a catalogue of provincial records. Seventeen species are here recorded for the first time from the southwestern Anatolian region. The presence of the three following species in Turkey is confirmed: Dytiscus semisulcatus MULLER, Eretes griseus (FABRICIUS), Hydaticus ponticus SHARP. Several species known previously from only a few localities in Turkey have been shown to have much wider distributions in the country. In accordance with the present study and literature data 49 species of Dytiscidae and 3 species of Noteridae are known from the southwestern Anatolian region.