161,060 species and infraspecific names are in the database, 22,719 images, 62,646 bibliographic items, 473,224 distributional records.

Scagelia E.M.Wollaston, 1972

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Ceramiaceae
Subfamily Ceramioideae
Tribe Scagelieae

Holotype species: Scagelia occidentalis (Kylin) Wollaston

Currently accepted name for the type species: Scagelia americana (Harvey) Athanasiadis

Original publication and holotype designation: Wollaston, E.M. (1972). Antithamnion and related genera occurring on the Pacific coast of North America. Syesis 4: 73-92.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Athanasiadis, A. (1996). Morphology and classification of the Ceramioideae (Rhodophyta) based on phylogenetic principles. Opera Botanica 128: [1]-221.

Description: Thallus erect, axes with whorls of 2-4 usually unequal determinate branchlets on each cell. Branch apices curved with irregular initiation of branchlets. Gland-cells lateral on branchlets. Procarps on basal (supporting) cells of branchlets which continue to elongate. Auxiliary cell leading to carposporophyte with rounded groups of carposporangia. Spermatangia on special short branches. Tetrasporangia on lower cells of branchlets, cruciately or tetrahedrally divided. Characterized by continued elongation of fertile branch and branchlet to give several carposporophytes at intervals along axes. Also differs from Antithamnionella in unequal branchlets.

Information contributed by: E.M. Wollaston. The most recent alteration to this page was made on 25 Jan 2017 by M.D. Guiry.

Comments: Widely distributed especially west coast of north America including Aleutian Is. and Bering Sea. Also in Pacific Ocean.

Numbers of names and species: There are 8 species names in the database at present, as well as 3 infraspecific names. Of the species names, 3 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

References
Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

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.

Created: 30 December 2000 by M.D. Guiry

Verified by: 25 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33058

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 April 2021.

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