Mougeotiopsis Palla, 1894
Holotype species: Mougeotiopsis calospora Palla
Original publication and holotype designation: Palla, E. (1894). Ueber eine neue pyrenoidlose Art und Gattungen der Conjugaten. Berichte der deutschen botanischen Gesellschaft 12: 228-236, pl. 18.
Request PDFDescription: Thalli unbranched, forming extensive skeins of intertwining uniseriate filaments. Cells cylindrical, 10-18 µm in diameter; up to 70 µm in length; cell wall two-layered with inner cellulose, outer mucilage layer; end walls plane; no flagellated stages. Cells uninucleate; chloroplast one per cell, axial, platelike, with thickened, granulate margin; pyrenoids absent. Life cycle haplobiontic, meiosis zygotic. Sexual reproduction by scalariform conjugation; isogamous. Zygospores form in conjugation tube but may protrude into gametangia; ovoid to quadrangular in shape. Outer wall thin, transparent; median wall with deep sharp pits (scrobiculate); yellow or brown. Mougeotiopsis known only from Europe, North America in freshwater. Trait of conjugation places Mougeotiopsis in Zygnematales; vegetatively similar to Mougeotia except latter with chloroplasts with thickened margins and axial row of pyrenoids. Thalli unbranched, forming extensive skeins of intertwining uniseriate filaments. Cells cylindrical, 10-18 µm in diameter; up to 70 µm in length; cell wall two-layered with inner cellulose, outer mucilage layer; end walls plane; no flagellated stages. Cells uninucleate; chloroplast one per cell, axial, platelike, with thickened, granulate margin; pyrenoids absent. Life cycle haplobiontic, meiosis zygotic. Sexual reproduction by scalariform conjugation; isogamous. Zygospores form in conjugation tube but may protrude into gametangia; ovoid to quadrangular in shape. Outer wall thin, transparent; median wall with deep sharp pits (scrobiculate); yellow or brown. Mougeotiopsis known only from Europe, North America in freshwater. Trait of conjugation places Mougeotiopsis in Zygnematales; vegetatively similar to Mougeotia except latter with chloroplasts with thickened margins and axial row of pyrenoids.
Information contributed by: R.M. McCourt and R.W. Howshaw. The most recent alteration to this page was made on 2022-09-26 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: Hess, S., Williams, S.K., Busch, A., Irisarri, I., Delwiche, C.F., de Vries, S., Darienko, T., Roger, A.J., Archibald, J.M., Buschmann, H., von Schwartzenberg, K. & de Vries, J. (2022). A phylogenomically informed five-order system for the closest relatives of land plants. Current Biology 32: 1-10.
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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=45853
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 26 September 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 November 2024
