Rivularia aquatica De Wildeman (1897: 40)

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

publication ID

https://doi.org/ 10.11646/phytotaxa.359.1.1

DOI

https://doi.org/10.5281/zenodo.13704374

persistent identifier

https://treatment.plazi.org/id/6B6487B2-1836-262B-EB9A-5450D2B8A8CA

treatment provided by

Felipe

scientific name

Rivularia aquatica De Wildeman (1897: 40)
status

 

Rivularia aquatica De Wildeman (1897: 40) Fig. 66 A–E.

Colonies small, hemispherical to irregularly spherical, 1–3 cm in diameter, without calcareous encrustations, olive-green to yellow-brown in colour; sheaths thin or thick, colourless, not striated, narrowed towards the ends, sometimes indistinct. Trichomes gradually attenuated towards the end, constricted at the cross walls, attenuated into a long hair at the trichome apex. Vegetative cells cylindrical or long barrel-shaped, isodiametric or longer or shorter than broad 5.0–9.8 μm long × 5.5–11.0 μm broad. Heterocytes spherical, solitary or rarely in pairs, 10.0–12.0 (–14.0) μm in diameter.

Specimens observed:—Edgbaston Reserve.

Other records:— Queensland: Cattle Ck, Mackay-Eungella Rd, 1 km W of Gargett, T. Entwisle, 1993 (MEL).

Observations:—Growing on the substratum of shallow spring-fed wetlands, amongst colonies of Iningianema pulvinus ; pantropical distribution (Komárek 2013).

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