Planktosphaerella Reisigl, 1964

Holotype species: Planktosphaerella terrestris Reisigl

Original publication and holotype designation: Reisigl, H. (1964). Zur Systematik und Ökologie alpiner Bodenalgen. Österreich Botanische Zeitschrift 111: 402-499, 41 figs.

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Description: Unicellular microscopic algae with spherical to ellipsoidal to oval or egg-shaped cells to 15 µm in maximum dimension. Cell walls thin and smooth. Cells uninucleate; chloroplasts single and parietal when young; many when mature; each with single pyrenoid with thick starch sheath. Asexual reproduction by autospores, 3-4 µm diameter; 2-32 spores per sporangium; released by rupture of parental cell wall. Flagellated cells and sexual reproduction unknown. Planktospherella known only from soil from the Austrian Alps. Genus considered close to Muriella from which it differs based on presence of pyrenoids. Assessment of taxonomic affinities requires additional investigation. Unicellular microscopic algae with spherical to ellipsoidal to oval or egg-shaped cells to 15 µm in maximum dimension. Cell walls thin and smooth. Cells uninucleate; chloroplasts single and parietal when young; many when mature; each with single pyrenoid with thick starch sheath. Asexual reproduction by autospores, 3-4 µm diameter; 2-32 spores per sporangium; released by rupture of parental cell wall. Flagellated cells and sexual reproduction unknown. Planktospherella known only from soil from the Austrian Alps. Genus considered close to Muriella from which it differs based on presence of pyrenoids. Assessment of taxonomic affinities requires additional investigation.

Information contributed by: T. Kalina & D. Garbary. The most recent alteration to this page was made on 2020-06-02 by M.D. Guiry.

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

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47199

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 02 June 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 18 April 2024