Orthocladius (Mesorthocladius) frigidus (Zetterstedt, 1838):

Blacksea region (Gültutan & Kazancı 2009), Marmara, Aegean, Sakarya river systems (Şahin 1987c), Eastern Blacksea region (Gültutan & Kazancı 2010), Çanakkale region (Özkan 2007), North Aegean Streams (Balık et al. 1999), Thrace region (Özkan 2010a).