Membraneis Paddock, 1988

Holotype species: Membraneis challengeri (Grunow) Paddock

Description: Frustules elliptical in outline, almost always lying in girdle view. Valves narrow with a highly vaulted raphe-bearing ridge, the line of the ridge forming a smooth curve from pole to pole with only a small depression at the central nodule, ridges lacking fins and fibulae; one side of valve higher than other forming a false ridge. Valves thin with punctate striae, extreme valve margin hyaline; raphe lies on ridge of valve, the central part of the raphe system is displaced from the apparent mid-line of the valve, one enlarged, tubular helictoglossa located at each pole, terminal micropyles absent. Girdle bands hyaline. Collected in plankton from the Antarctic and south Atlantic Oceans.

Information contributed by: D. B. Czarnecki. The most recent alteration to this page was made on 2005-06-28 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Hasle, G.R. & Syvertsen, E.E. (1996). Marine diatoms. In: Identifying Marine Phytoplankton. (Tomas, C.R. Eds), pp. 5-385. San Diego: Academic Press.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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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Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 28 June 2005. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 04 October 2022

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