The genus Entosthodon Schwägr. is represented in the
Caucasus by six species, among them only E.
muhlenbergii has been known for the territory
until now. Entostodon fascicularis
is excluded from the Caucasian moss flora, as all so-called specimens are
re-identified as E. handelii, a species new
for Russia.
Three new species, Entosthodon dagestanicus, E. abramovae
and E. stenophyllus, are described and
illustrated. Entosthodon hungaricus is found in the region for the first time. The
identification key is given for the Entosthodon
species from the Caucasus and neighboring
areas.