Tovellia Moestrup, K.Lindberg & Daugberg, 2005

Holotype species: Tovellia coronata (Wołoszyńska) Moestrup, K.Lindberg & Daugbjerg

Original publication and holotype designation: Lindberg, K., Moestrup, Ø & Daugbjerg, N. (2005). Studies on woloszynskioid dinoflagellates I: Woloszynskia coronata re-examined using light and electron microscopy and partial LSU rDNA sequences, with description of Tovellia gen. nov. and Jadwigia gen. nov. (Tovelliaceae fam. nov.). Phycologia 44: 416-440.

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Description: Cells covered with many, often hexagonal, amphiesmal plates which are usually difficult to see in the light microscope except after staining or in empty thecae that can be studied at high magnification using phase contrast or interference contrast microscopy. The plates are arranged in 6–17, more or less distinct latitudinal rows. The cingulum generally comprises only a single row of plates but the postcingular row of plates curves over the cingulum edge into the cingulum. Tovellia stoschii was drawn with two rows of plates in the cingulum. The arrangement of the chloroplasts divides the genus into two: (1) those with chloroplasts radiating from the cell center (T. apiculata, T. aveirensis, T. nygaardii, T. sanguinea) and those in which the chloroplasts are parietal or more or less fill the cytoplasm (T. coronata, T. glabra, T. paldangensis, T. stoschii). There is some indication that in old or nutrient-depleted cells the radiating arrangement of the chloroplasts is lost, the arrangement becoming more irregular. In species with radiating chloroplasts, the central parts are often located close together and in T. sanguinea and T. aveirensis they form a compound pyrenoid. When known, cell division appears to take place within the non-motile cell, resulting in the formation of up to 8 zoospores. They are probably released through a slit in the epicone, corresponding to the position of the ALP. Cysts with paracingulum, two often very distinct opposite axial horns, and pre- and postcingular protuberances or with more evenly distributed, sometimes branched spines.

Information contributed by: Moestrup & Calado (2018). The most recent alteration to this page was made on 2021-09-27 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 feminine.

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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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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 27 September 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 17 June 2024

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