EN
The descriptions of Plectus amorphotelus Ebsary, 1985 and P. spicacaudatus Ebsary, 1985 found in Ukraine for the first time are provided. The variability of measurements nine different populations of P. amorphotelus is given. Both species are characterised by atypical structure of tail terminus and absence of caudal glands. New data about distribution of somatic setae and shape of vagina are given. Abnormalities in tail structure in three other species of the genus Plectus are described and discussed.