The present study of Lower Kimmeridgian biostratigraL ^ H phy in Poland is based on the following ammonites: Ataxioceras, Ne114 brodites, Katroliceras, Glochiceras, Streblites, Taramelliceras, Idoceras, Sutneria, Orthosphinctes, Lithacoceras, Aspidoceras, Amoeboceras, Ringsteadia, Rasenia, Pictonia, and Zonovia. The analysis of this fauna confirms that the Lower Kimmeridgian sediments in Poland, also in its northern parts, have rightly been subdivided into the following three zones: the lower one — Sutneria platynota, the middle one — Ataxioceras hypselocyclum, and the upper one — Katroliceras divisum (partly).