Abstract: In this investigation, the description of Polydiexiodina erki n. sp. is given which is found abundantly inUpper Permian limestones, and calcareous arenites cropping out at Gensirt hill which is located in NE Elmadağ:. Thesamples were taken from Late Palaezoic sequence determined in thin sections, and the new species compared with theother well known Polydiexodina species.