Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species Author Mai, Truc Department of Biology, John Carroll University, 1 John Carroll Blvd., University Heights, Ohio 44118, USA & Department of Plant and Environmental Sciences, New Mexico State University, Skeen Hall Room N 127, P. O Box 30003 MSC 3 Q, Las Cruces, New Mexico 88003, USA. Author Johansen, Jeffrey R. Department of Biology, John Carroll University, 1 John Carroll Blvd., University Heights, Ohio 44118, USA & Department of Botany, Faculty of Science, University of South Bohemia, 31 Branišovská, 37005 České Budějovice, Czech Republic Author Pietrasiak, Nicole Department of Plant and Environmental Sciences, New Mexico State University, Skeen Hall Room N 127, P. O Box 30003 MSC 3 Q, Las Cruces, New Mexico 88003, USA. Author Bohunická, Markéta Author Martin, Michael P. Department of Biology, John Carroll University, 1 John Carroll Blvd., University Heights, Ohio 44118, USA text Phytotaxa 2018 2018-08-16 365 1 1 59 http://dx.doi.org/10.11646/phytotaxa.365.1.1 journal article 10.11646/phytotaxa.365.1.1 1179-3163 Cartusia Mai, Johansen et Pietrasiak gen. nov. Description:— Filaments straight or flexuous, sometimes with more than one trichome in a common sheath, sometimes forming fascicles of trichomes, without false branching. Sheaths firm, thin, colorless. Trichomes not tapering, not or only slightly constricted at the cross-walls, up to 3.5 μm wide. Cells mostly shorter than wide up to isodiametric. Etymology:— named for the ruins of the Cartusian Monastery in National Park Slovak Paradise, from which the reference strain was collected. Type species:— Cartusia fontana Mai, Johansen et Pietrasiak , comb. nov.