Sphaerodinium Woloszynska, 1916
Lectotype species: Sphaerodinium polonicum Wołoszyńska
Original publication: Woloszynska, J. (1916). Polnische Süsswasser-Peridineen. Bulletin International de l'Académie des Sciences de Cracovie. Classe des Sciences Mathematiques et Naturelles. Série B. Sciences Naturelles 1915(8-10): 260-285, plates 10-14.
Request PDFType designated in: Loeblich, A.R. & Loeblich, A.R. (1966). Index to the genera, subgenera, and sections of the Pyrrhophyta. Studies in Tropical Oceanography 3: [i]-x, 1-94, 1 plate.
Description: Spherical or oval cells, amphiesma with nearly symmetrical plate arrangement. Epi- and hypocone of equal size or epicone slightly larger. Cells sometimes slightly dorsoventrally compressed. Cingulum descending. The sulcus appears to extend onto the epicone but SEM of S. cracoviense has shown that the apparent extension is formed by a separate amphiesmal plate, which may or may not be considered part of the sulcus. It is directly aligned with the first apical plate and may have originated by transverse division of an ancestral first apical plate extending from the cingulum to the apex. Plate formula: 4', 4a, 7'', Z, 8c (?), 4s, 6''', 2'''', but an apical complex of 3 very small plates also present, one of which with a line of knob-like protuberances. The two antapical plates may be of slightly different size. With many brown, plate-like chloroplasts (or chloroplast lobes). Eyespot (if present) horseshoe-shaped, of type F. Resting cyst spherical or oval (S. cracoviense), smooth or papillate.
Information contributed by: Moestrup & Calado (2018). The most recent alteration to this page was made on 2023-05-22 by E.A. Molinari Novoa.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as neuter.
Most recent taxonomic treatment adopted: Moestrup, Ø. & Calado, A.J. (2018). Süßwasserflora von Mitteleuropa. Dinophyceae. Vol. 6 pp. [i]-xii, [1]-560, 421 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=43629
Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 22 May 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
