Pearsoniella F.E.Fritsch & M.F.Rich, 1924

Holotype species: Pearsoniella variabilis F.E.Fritsch & M.F.Rich

Original publication and holotype designation: Fritsch, F.E. & Rich, F. (1924). Contributions to our knowledge of the freshwater Algae of Africa. 4. Freshwater and subaerial algae from Natal. Transactions of the Royal Society of South Africa 11(1): 297-398.

Description: Unbranched filaments, first uniseriate, later multiseriate by successive longitudinal cell divisions. Cells cylindrical, sometimes barrel-shaped, usually shorter than broad, with thickened, gelatinous, sometimes clearly layered cell wall. Chloroplast parietal, completely closed, girdle-shaped, with several pyrenoids. In young cells the chloroplast has the shape of a very low ring with smooth edge; in older and wider cells, it is more elongated and lobed at the margin, rarely with fingershaped lobes. One nucleus is located in the cell centre. Asexual reproduction by filament disintegration into single cells or short fragments, and by quadriflagellate zoospores. Sexual reproduction not observed. A genus with a single species from freshwater habitats.

Information contributed by: Škaloud et al. (2018).. The most recent alteration to this page was made on 2018-03-15 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Škaloud, P., Rindi, F., Boedeker, C. & Leliaert, F. (2018). Süßwasserflora von Mitteleuropa. Freshwater flora of central Europe: Chlorophyta V: Ulvophyceae. Vol. 13 pp. [i]-vii, [1]-288, 182 figures. Berlin: Springer Spektrum.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=50169

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 15 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 18 April 2024