Spyridia Harvey, 1833

Holotype species: Spyridia filamentosa (Wulfen) Harvey

Original publication and holotype designation: Harvey, W.H. (1833). Div. I. Inarticulatae. Div. II. Confervoideae; Div. III. Gloiocladeae. In: The English Flora of Sir James Edward Smith. Class XXIV. Cryptogamia. Vol. V. (or Vol. II of Dr. Hooker's British flora). Part I. Comprising the Mosses, Hepaticae, Lichens, Characeae and Algae. (Hooker, W.J. Eds), pp. 259-262, 264-401. London: Longman, Brown, Green & Longmans Paternoster-Row.

Request PDF

Description: Thallus erect, filamentous, profusely branched, with numerous radially arranged lateral branches per axial cell. Primary axes wholly corticated by elongate cells arranged in transverse bands, generally with alternating bands of short and long cells. Determinate lateral branches simple, corticated only at the nodes by transverse bands of cells. Cells uninucleate. Spermatangia covering lower cells of fertile laterals. Procarps on short lateral branches, with 2 or 3 pericentral cells, one bearing the 4-celled carpogonial branch. Carposporophytes with 2 or 3 gonimolobes, with a filamentous involucre. Tetrasporangia sessile on lateral branch cortical bands, tetrahedral or subcruciate.

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.

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.

Comments: Distinctive genus, widespread in temperate to warm seas, sublittoral and on reefs or rocks in warm, shallow water.

Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=33063

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 26 April 2024