Annales des Sciences Naturelles, Botanique, Série 7, 15: 136 (Gomont 1892). Desikachary, Cyanophyta 314, t. 49, f. 9 & t. 52, f. 13 (Desikachary 1959). Komárek & Anagn., Cyanoprokaryota Part 2: Oscillatoriales 19 (2): 623, f. 945 (Komárek & Anagnostidis 2005).
DESCRIPTION. — Filament almost straight; sheath colourless, homogenous, later becoming slightly thicker, lamellated; trichome olive-green or blue-green, usually not constricted at the cross-walls, cross-walls granulated, not attenuated at the end; apical cell rounded, calyptra absent (Fig. 8H).
DIMENSION. — Trichome 7.6-12.0 µm broad and cells 2.0-3.8 µm long.
ENVIRONMENT & HABITAT. — Marine species; wet rocks; temperature 3.5°C.