Spirocladia Børgesen, 1933

Holotype species: Spirocladia barodensis Børgesen

Original publication and holotype designation: Børgesen, F. (1933). On a new genus of the Lophotalieae (fam. Rhodomelaceae). Kongelige Danske Videnskabernes Selskab, Biologiske Meddelelser 10(8): 1-16, 10 figs.

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Description: Thallus erect, decumbent or with erect and prostrate axes. Primary axes polysiphonous, each axial cell with 4 pericentral cells, ecorticate or lightly to heavily corticated by descending rhizoids. Pigmented trichoblasts arising from basal cells borne 1 per segment and in a quarter spiral arrangement. Reproductive structures on trichoblasts. Spermatangial branches cylindrical to conical, with a monosiphonous stalk and bearing lateral monosiphonous filaments in the fertile region. Cystocarps ellipsoidal to urceolate. Tetrasporangia in stichidia, with 1 sporangium per segment in a spiral sequence and also bearing lateral monosiphonous filaments.

Information contributed by: Huisman (2018). The most recent alteration to this page was made on 2018-10-10 by M.D. Guiry.

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

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42082

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 November 2024