Tussetia Pascher, 1927

Holotype species: Tussetia polytomoides Pascher

Original publication and holotype designation: Pascher, A. (1927). Die Süsswasser-Flora Deutschlands, Österreichs und der Schweiz. Volvocales = Phytomonadinae. Vol. 4 pp. 505. Jena: Fischer.

Description: Unicellular thalli ovate but tapering strongly at the apex. Two isokont flagella inserted at the apex. Protoplast is colorless (lacking photosynthetic pigment) but does exhibit yellow to orange-red oil droplets. Pyrenoid absent. Two apical contractile vacuoles normally present. Papillum and stigma present or absent depending on the species. Asexual reproduction by zoosporogenesis resulting in four motile daughter cells. Plane of cell division is longitudinal. No other asexual stages have been reported. Sexual reproduction is anisogamous in T. polytomoides resulting in spherical zygotes which have been reported to exhibit a fine surface architecture. Unicellular thalli ovate but tapering strongly at the apex. Two isokont flagella inserted at the apex. Protoplast is colorless (lacking photosynthetic pigment) but does exhibit yellow to orange-red oil droplets. Pyrenoid absent. Two apical contractile vacuoles normally present. Papillum and stigma present or absent depending on the species. Asexual reproduction by zoosporogenesis resulting in four motile daughter cells. Plane of cell division is longitudinal. No other asexual stages have been reported. Sexual reproduction is anisogamous in T. polytomoides resulting in spherical zygotes which have been reported to exhibit a fine surface architecture.

Information contributed by: M. Buchheim. The most recent alteration to this page was made on 2012-06-28 by Michael Guiry.

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

Most recent taxonomic treatment adopted: Masjuk, N.P., Lilitska, G.G. & Kapustin, D.O. (2011). Chlamydomonadales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 157-218. Ruggell: A.R.A. Gantner Verlag K.-G..

Comments: Tussetia strongly resembles Polytoma save for the oil droplets and longitudinal cell division. Tussetia has been found in soil and stagnant water. The genus is known from Europe and India. No biochemical or molecular data are available for this organism

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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.

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Citing AlgaeBase
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 28 June 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 07 May 2024