Theleodinium Craveiro, Pandeirada, Daugbjerg, Moestrup & Calado, 2013

Holotype species: Theleodinium calcisporum Craveiro, Pandeirada, Daugbjerg, Moestrup & Calado

Publication details: Craveiro, Pandeirada, Daugbjerg, Moestrup & Calado, 2013: 490

Original publication and holotype designation: Craveiro, S.C., Pandeirada, M.S., Daugbjerg, N., Moestrup, O. & Calado, A.J. (2013). Ultrstructure and phylogeny of Theleodinium calcisporum gen. et sp. nov., a freshwater dinoflagellate that produces calcareous cysts. Phycologia 52(6): 488-507.

Description: Plate formula po, cp, x, 3? (4?), 2a, 7'', 6c, 5–6s, 5''', 2''''. Cells with projecting, nipple-like apical pore. Peduncle and microtubular basket present, and therefore possibly mixotrophic. With pyrenoid-containing chloroplasts. The single species described produces calcified cysts.

Information contributed by: Moestrup & Calado (2018). The most recent alteration to this page was made on 2018-10-25 by M.D. Guiry.

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

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.

Taxonomic note
The fine structure of Theleodinium calcisporum places it in an intermediate position between Scrippsiella and Chimonodinium. The most inclusive phylogenetic tree shows Theleodinium in a statistically supported clade together with species of Scrippsiella and Duboscquodinium collinii. This clade in turn appears as a sister group to Tintinnophagus acutus, although, with no statistical support. The genus Chimonodinium has been shown in previously published phylogenetic trees to group with the pfiestericean clade (Craveiro et al. 2011). This is compatible with the picture given by structural analysis, that Theleodinium occupies an intermediary evolutionary position between the Scrippsiella clade and the clade containing Chimonodinium and the pfiesteriaceans. (Craveiro et al. 2013). - (27 February 2014) - G.M. Guiry

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=51558

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 25 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 10 June 2025