Abstract
The genus Hazenia H.C.Bold was described by Bold (1958: 742) to accommodate a single species, Hazenia mirabilis H.C.Bold, isolated from a pool near Nashville, Tennessee, USA, and characterized by irregularly branching uniseriate or partially multiseriate filaments, surrounded by a mucilaginous envelope. Škaloud et al. (2013: 1288) described a second species, H. broadyi Škaloud, Nedbalová, Elster & Komárek, from a shallow lake on James Ross Island, NE Antarctic Peninsula, and proposed a new combination, H. basiliensis (Vischer) Škaloud, Nedbalová, Elster & Komárek for Pseudendoclonium basiliense Vischer based on morphological and molecular evidence. Since its description, the genus name Hazenia has become well established in the literature (e.g., Bourrelly 1966; Broady 1979; Ettl & Gärtner 1995; Leliaert et al. 2015; Printz 1964; Škaloud et al. 2013; Starmach 1972).