Distribution of Myrmecophilus acervorum (Panzer, 1799) (Orthoptera: Myrmecophilidae) in Poland

This study summarises information on the occurrence of Myrmecophilus acervorum in Poland years 1851–2022. We collected about 143 localities: 40 from literature and 103 unpublished. is reported seven new regions: Baltic Coast, Białowieża Primeval Forest, Eastern Sudety Mts, Kraków-Wieluń Upland, Podlasie Lowland, Sandomierska Lowland Trzebnickie Hills. While until 2010 observations were rare (35 localities), 2011–2022 species was found 108 localities. A total 443 individuals M. observed Poland, but sex identified only for 138, which 135 mature females or female nymphs. Males recorded historically Pomeranian Lakeland. At present, these records should be treated with caution, as they are uncertain.