Wittrockiella Wille, 1909
Holotype species: Wittrockiella paradoxa Wille
Currently accepted name for the type species: Wittrockiella amphibia (Collins) C.Boedeker & G.I.Hansen
Original publication and holotype designation: Wille, N. (1909). Algologische Notizen XV. Über Wittrockiella nov. gen. Nyt Magazin for Naturvidenskaberne 47: 209-225, 4 pls.
Request PDFDescription: Thalli with heterotrichous organisation. A prostrate system of branched uniseriate filaments gives rise to an upright system of branched, uniseriate filaments. Cells in the upright systems tend to be nearly cylindrical, while those in the prostrate system are more irregular in shape. The apical cells of the upright filaments are typically more densely pigmented. Branches are subterminally inserted with delayed cell wall formation. The diameter of the filaments varies greatly between species and the overall range is from 10 to 750 ?m. Reproductive structures are unspecialised cells that transform into aplanosporangia, zoosporangia or gametangia that release aplanospores or zoids through an elongated exit tube (Fig. 140c). Such reproductive cells have not yet been found in some species. Enlarged cells are common and may be either immature sporangia or akinetes. Colourless non-septate hairs are rarely formed and have only been observed in nutrient-depleted cultures. The only attachment structures that are formed are secondary rhizoids, which are typically much thinner than the main filaments and consist of long cells often with a sinuous outline. Rhizoids are typically inserted terminally but lateral rhizoids also occur and can end in haptera.
Information contributed by: Skaloud et al. (2018).. The most recent alteration to this page was made on 2018-03-17 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Most recent taxonomic treatment adopted: Škaloud, P., Rindi, F., Boedeker, C. & Leliaert, F. (2018). Süßwasserflora von Mitteleuropa. Freshwater flora of central Europe: Chlorophyta V: Ulvophyceae. Vol. 13 pp. [i]-vii, [1]-288, 182 figures. Berlin: Springer Spektrum.
Comments: Wittrockiella amphibia (formerly W. paradoxa) is widely distributed in temperate to tropical (rarely) areas (NW Europe, Pacific and Atlantic coasts of North America); occurring in oligohaline or mesohaline areas of saltmarshes, epiphytic on living or decaying saltmarsh phanerogams, or more rarely free-living on mud among other saltmarsh algae. Wittrockiella salina known only from New Zealand, differing from W. amphibia in lacking rhizoidal thalli and having larger cells. The different forms of Wittrockiella amphibia apparently environmentally induced; rhizoidal forms from nature develop cladophoroid habit in culture.
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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=38404
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 17 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
