Sellaphora Mereschowsky, 1902
Lectotype species: Sellaphora pupula (Kützing) Mereschkovsky
Original publication: Mereschkowsky, C. (1902). On Sellaphora, a new genus of diatoms. Annals and Magazine of Natural History, Series 7 9: 185-195, pl. IV [figs 1-17].
Request PDFType designated in: Mann, D.G. (1989). The diatom genus Sellaphora: separation from Navicula. British Phycological Journal 24(1): 1-20, 58 figs, 1 table.
Description: Internal central raphe endings deflected towards the primary side of the valve. Poroids small, round, containing hymenes. Plastid single, H-shaped, lying with its centre against the epivalve. Pyrenoid more or less tetrahedral during interphase, invaginated; one per plastid. Plastid translocated onto the girdle before mitosis. Division of plastid beginning before cytokinesis (and indeed before the previous division is complete ...), proceeding asymetrically, and arresting before completion to produce the H-shape of interphase. 90-degree rotation of the plastid onto the epivalve occurring at the end of valve formation. Gametangia not surrounded by a mucilage sheath; closely associated throughout meiosis and plasmogamy; opening only partially to allow gamete migration via a copulation aperture. One functional gamete and one apochlorotic cell formed per gametangium. Gametes physiologically anisogamous: auxospore formed within one gametangium and expanding parallel to its apical axis.
Information contributed by: D. Mann (1989). The most recent alteration to this page was made on 2022-05-13 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Most recent taxonomic treatment adopted: Van de Vijver, B., Lange-Bertalot, H., Wetzel, C.E. & Ector, L. (2017). Michelcostea, a new diatom genus (Bacillariophyta) from the sub-Antarctic region. Nova Hedwigia Beiheft 146: 125-136, 19 figs.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=43753
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 13 May 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024
