“…For the Paraná State 26 studies have contributed to the desmids knowledge until the present moment: Bittencourt-Oliveira (1993a, b), Bittencourt-Oliveira & Castro (1993), Cecy (1993), Bittencourt-Oliveira & Mecenas (1994), Cecy et al (1997), Picelli-Vicentim (2001), Cetto et al (2004), Silva & Cecy (2004), Biolo et al (2008Biolo et al ( , 2013, Felisberto & Rodrigues (2007, Moresco et al (2009), Bortolini et al (2008Bortolini et al ( , 2009Bortolini et al ( , 2010a, Menezes et al (2011aMenezes et al ( , b, 2013, Aquino et al(2014) and Carvalho et al (2015). Among them, only four comprise exclusively the Cosmarium genus: Felisberto & Rodrigues (2010b), Menezes et al (2011b), Biolo et al (2013) and Carvalho et al (2015).…”