(Plovdiv University Press "Paisii Hilendarski", 2024-06-17) Valchovski, Hristo
Identifying the earthworm material recently collected from pre-Balkan hill zone resulted in discovered new record of rare Balkan endemic species from Cernosvitovia biserialis (Černosvitov, 1937) since 1967. This is the northern finding of the species from Bulgaria. The paper also provided information about distribution, zoogeography and ecology of this taxon.