Tetraplektron Fott, 1957
Holotype species: Tetraplektron tribulus (Pascher) Lobelich, III
Original publication and holotype designation: Fott, B. (1957). Taxonomie drobnohledné flory našich vod [Taxonomie der mikroskopischen Flora einheimischer Gewasser]. Preslia 29: 278-319, 11 figs.
Request PDFDescription: Unicellular, solitary, free-living, non-motile organisms 20-50 _m long and 20-26 _m wide. Cells regularly tetrahedral with the angles more or less developed into arms mostly of equal length; 20-26 _m between the extremities of two arms. Cell wall generally delicate, smooth, sometimes thickened at the ends of arms, rarely thick throughout, irregularly scrobiculate, and sometimes more or less ornamented. Chloroplasts several to numerous, parietal, discoid, irregular or ribbon shaped. Chloroplasts arranged in the central portion of the cell, thus leaving the arms generally without chloroplasts and often pale. Pyrenoids absent. Storage products comprised of red oil droplets and lipids. Asexual reproduction by autosporulation observed rarely. Autospores arranged in the mother cell at the apices of the tetrahedron. Sometimes autospores with contractile vacuoles and eventually with a stigma; these are hemiautospores. Tetraplektron rare, in plankton or periphyton in lakes or ponds; reported from western Europe, western Africa and South America. Species distinguished based on the general morphology of the cell, the dimensions of the arms and the presence or absence of a spine at the tips of the arms, and the form and position of chloroplasts. Bourrelly (1981) proposed that T. acutum (Pascher) Fott be placed in Tetraedriella Pascher based on the shortness of the arms and the scrobiculations of the cell wall. The combination Tetraplektron tribulum was proposed by Fott without a basionym, and this was rectified by Loeblich III.
Information contributed by: P. Compère & A. Couté. The most recent alteration to this page was made on 2021-10-05 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as masculine.
Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.
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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=43828
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 05 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 April 2024
