152,947 species and infraspecific names are in the database, 20,947 images, 59,170 bibliographic items, 408,277 distributional records.

Opuntiella Kylin, 1925

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Gigartinales
Family Furcellariaceae

Holotype species: Opuntiella californica (Farlow) Kylin

Original publication and holotype designation: Kylin, H. (1925). The marine red algae in the vicinity of of the Biological Station at Friday Harbor, Wash. Lunds Universitets Årsskrift, Ny Följd, Andra Afdelningen 21(9): 1-87, 47 figs.

Taxonomic status: currently recognized as a distinct genus.

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.

Description: Plants reach 30 cm in height, are erect from a fleshy discoid base, and consist of a primary blade bearing varying numbers of secondary blades from the margin, this pattern capable of being repeated to several orders.

Blades are multiaxial, the medulla being broad and filamentous and the cortex compact. Large refractive cells occur scattered in the outer cortex, the function of which is presumably for storage rather than secretion (Young 1979).

Spermatangial mother cells are elongate and produce up to 3 spermatangia each. Carpogonial branches are 3-celled and borne terminally on short modified vegetative filaments, the hypogynous cell being large and refractive. Following fertilization the carpogonium divides into 2 cells from which up to 6 connecting filaments arise. Auxiliary cells are surrounded by cortical cells bearing chains of nutritive cells. As the inwardly directed gonimoblast expands it incorporates most of the nutritive cells into a central fusion cell. Chains of gonimoblast radiating from the fusion cell mature almost entirely into carposporangia, which are shed through an ostiole. Tetrasporangia are scattered in the cortex.

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 7 Oct 2010 by M.D. Guiry.

Comments: Reproductive details are discussed in a preliminary way by Hansen and Scagel (1980).

Distribution: Endemic to western North America from Alaska to Baja California, mostly in subtidal habitats.

Numbers of names and species: There are 3 species names in the database at present, of which 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.

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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.

Created: 28 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42244

Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 September 2018.

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