Nostochopsis Wood ex Bornet & Flahault (1886: 80)

Mcgregor, Glenn B., 2018, Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales, Phytotaxa 359 (1), pp. 448-450 : 448-450

Nostochopsis Wood ex Bornet & Flahault (1886: 80)

Type: N. lobatus H.C.Wood ex Bornet & Flahault (1886: 80)

Thallose, attached to the substratum, macroscopic, forming an expanded gelatinous mass, which may be irregularly spherical, sometimes forming large, bulbous colonies, initially hollow, later free-floating, and composed of radially arranged erect filaments. Filaments with diffluent, mucilaginous sheaths; trichomes long, irregularly true-branched, cylindrical, sometimes irregularly narrowed. Sheaths gelatinous and confluent, colourless or slightly yellow-brown in colour. Vegetative cells barrel-shaped; heterocytes intercalary, terminal at the ends of short branches or lateral on the main trichome. Akinetes not known. Reproduction by disintegration of thallus and by the production of hormogonia which develop on the ends of branches. Eight species currently described, one known from Australia. Bibliography: Gugger & Hoffmann (2004), Moreno et al. (2012), Komárek (2013).