Conferva duplisecta Pollini: rediscovery in Euganean Thermal Springs (Italy) and new assignment to the Oscillatoria genus

In this paper we report the presence on the thermal muds of the Euganean District of a filamentous cyanobacterium, with morphological features comparable with those of Conferva duplisecta Pollini, described in 1817 and never more signalized. Morphological, ultrastructural and molecular analyses led us to define more precisely the taxonomy of this cyanobacterium, ascribing it to the genus Oscillatoria and named by us Oscillatoria duplisecta (Pollini) Moro et Andreoli.