Dilabifilum Tschermak-Woess, 1971

Holotype species: Dilabifilum arthropyreniae (Vischer & Klement) Tschermak-Woess

Currently accepted name for the type species: Pseudendoclonium arthopyreniae (Vischer & Klement) Darienko & Pröschold

Original publication and holotype designation: Tschermak-Woess, E. (1971 '1970'). Über wenig bekannte und neue Flechtengonidien V Der Phycobiont von Verrucaria aquatilis und die Fortpflanzung von Pseudopleurococcus arthopyreniae. Österreichische Botanische Zeitschrift 118: 443-455.

Description: Plants formed of uniseriate filaments. Primary filament prostrate, arising by unipolar or, more rarely, bipolar spore germination, and bearing many erect or secondary branches that produce laterals. Cells cylindrical in younger filaments but swelling to form akinetes in ageing cultures especially on agar where alga develops as dark green mass of coccoid cells. Cells uninucleate with single parietal chloroplast and pyrenoid. Asexual reproduction by aplanospores formed 16 or 32 per cell, and quadriflagellate zoospores, both spore types formed in swollen intercalary cells. Sexual reproduction unknown. Dilabifilum isolated from various surfaces (e.g. lichens, mollusc shells, calcareous crusts, stones) collected in freshwater and marine (intertidal) habitats; more frequently recorded from the former. Only reported from Europe. A report of sporangia and quadriflagellate zoospores in cultures of type species not confirmed during more recent examination of strain of the type species. Asexual reproduction unknown in two other species placed in this rather ill-defined genus. Uncertainty surrounds placement in Dilabifilum of the two species for which motile stages are unknown. Ultrastructural information lacking for all three species. Taxonomy culture-based with species distingushed principally on the form of the thallus of plants grown under carefully defined conditions.

Information kindly contributed by D.M. John but may now be outdated.

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

Most recent taxonomic treatment adopted: Darienko, T. & Pröschold, T. (2017). Toward a monograph of non-marine Ulvophyceae using an integrative approach (Molecular phylogeny and systematics of terrestrial Ulvophyceae II.). Phytotaxa 324(1): 1-41, 23 figs.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 14 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 27 March 2023

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