Fortiea sp. A

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

Fortiea sp. A Fig. 60 A .

Filaments single or rarely in irregular clusters, amongst filamentous algae, 4.2–5.6 μm wide. Trichomes cylindrical slightly narrowed towards the central areas, constricted at the cross walls; sheath thin, firm, hyaline, not lamellated, open at the ends. Vegetative cells cylindrical, 2.7–3.7 × longer than broad, elongated towards the central areas, 8.2– 10.6 μm long × 2.8–3.2 μm wide; apical cells bluntly rounded. Heterocytes basal, spherical, 2.9–5.3 μm long × 2.8–6.2 μm wide. Akinetes not observed.

Specimens observed:—Palmer R. at Gum Ck.

Observations:—Growing amongst filamentous algae in the shallow benthic areas of tropical streams along with Camptylonemopsis cf. pulneyensis . Species from the genus Fortiea resemble several genera which grow attached, with either part or the entire filament, to the substrate including Camptylonemopsis , Aulosira , and Microchaete .

MICROCHAETE

Figures

FIGURE 60. A Fortiea sp. A; B–I Calothrix sp. C; J–K Microchaete sp. A. Scale bars = 20 μm