Updated checklist of Albanian aquatic beetles with first localities of some species of Hydradephaga, Hydrophiloidea and Byrrhoidea (Coleoptera)

New records of 34 aquatic beetle species from Albania are presented. Seventeen species are recorded for the first time from this country, including 3 species of Haliplidae, 6 of Dytiscidae, 6 of Hydrophilidae and 2 of Dryopidae. Coelostoma hispanicum (Küst.) is confirmed to occur in an area east of the Mediterranean Sea. An updated checklist of Albanian aquatic Coleoptera is also provided. The list counts 125 species belonging to 11 families. There are 3 species of Gyrinidae, 9 of Haliplidae, 1 of Noteridae, 44 of Dytiscidae, 4 of Helophoridae, 1 of Hydrochidae, 21 of Hydrophilidae, 33 of Hydraenidae, 5 of Elmidae, 3 of Dryopidae, and 1 of Limnichidae.