Tortella
nitida (Lindb.) Broth.
is newly reported for the Russian part of the Caucasus region. Descriptions,
illustrations, distinctions, ecology and distributional pattern are given for
this species and for T. bambergeri (Schimp.) Broth. and T.
flavovirens (Bruch) Broth. recently found in a coastal area of the Black
Sea. The identity of T. brotheri (Lindb.) Broth. is discussed. Seven
species of Tortella are currently known in the Russian part of the
Caucasus: T. alpicola Dixon, T. bambergeri, T. flavovirens,
T. fragilis (Hook. & Wilson) Limpr., T. inclinata (R. Hedw.) Limpr.,
T. nitida and T. tortuosa (Hedw.) Limpr.. A key for
identification of these species is provided.