New Record of Arctodiaptomus (Mesodiaptomus) toni Brehm, 1937 (Copepoda, Calanoida, Diaptomidae) From İnland Water of Turkey.

In eastern region of Turkey, copepod fauna of 31 localities was investigated and 23 species were identified from 4 families. Aygır Lake is the richest with 7 species in terms of the number of copepod species, followed by the Kuyucuk Lake and the Akcakale Peninsula with 6 species. No copepods were found at stations 2, 5, 8, 9, 10, 19, 20, 22, 23, 24 for reasons of human settlements, water quality parameters and environmental factors. The Calanoid copepod, Arctodiaptomus (M) toni which was found in two stations (Lavaş Lake and Putka Gölbaşı Lake) is new record for the inland waters of Turkey. Both habitats of the species are similar to each other in terms of altitude and lake structure, and similar to Elburz, where the species was first found.