The specimens were collected from 16 stations between February 1998 and May 1999 with the aim of seasonally determining the Oligochaeta and Aphanoneura fauna of the Gediz Delta. The specimens obtained by collection of mud samples with an Ekman grab and elimination with a fine 500 µm sieve were preserved in 4% formaldehyde solution. A total of 47 species were determined, comprising 25 species from Tubificidae, 17 species from Naididae, 3 species from Enchytraeidae and 2 species from Aeolosomatidae. Seventeen of the species determined are new records for the inland water fauna of Turkey.

The specimens were collected from 16 stations between February 1998 and May 1999 with the aim of seasonally determining the Oligochaeta and Aphanoneura fauna of the Gediz Delta. The specimens obtained by collection of mud samples with an Ekman grab and elimination with a fine 500 µm sieve were preserved in 4% formaldehyde solution. A total of 47 species were determined, comprising 25 species from Tubificidae, 17 species from Naididae, 3 species from Enchytraeidae and 2 species from Aeolosomatidae. Seventeen of the species determined are new records for the inland water fauna of Turkey.