Helicodictyon L.A.Whitford & G.J.Schumacher, 1996

Holotype species: Helicodictyon planctonicum (L.A.Whitford) L.A.Whitford & G.J.Schumacher

Currently accepted name for the type species: Rhexinema planctonicum (L.A.Whitford) Darienko & Pröschold

Original publication and holotype designation: Whitford, L.A. & Schumacher, G.J. (1966). Helicodictyon nom. nov. pro Heterodictyon and Helicodictyaceae fam. nov. (Ulotrichales). Phycologia 5: 274-276.

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Description: Buoyant colonies composed of short filaments which enclose a gas bubble at the colony centre. The cells excrete an extensive, transparent, homogeneous mucilaginous envelope surrounding the entire colony. Cells uninucleate, cylindrical, usually peculiarly curved, containing a parietal chloroplast with one distinct pyrenoid. Asexual reproduction by colony fragmentation and by biflagellate zoospores. Gas bubbles develop within the small daughter colonies. Sexual reproduction by isogamy.

Information kindly contributed by Skaloud et al. (2018: 121). but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Rhexinema.

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.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44555

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 15 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 December 2024