154,210 species and infraspecific names are in the database, 21,059 images, 59,694 bibliographic items, 415,383 distributional records.

Hommersandia G.I.Hansen & S.C.Lindstrom, 1984

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

Holotype species: Hommersandia maximicarpa G.I.Hansen & S.C.Lindstrom

Currently accepted name for the type species: Hommersandia palmatifolia (Tokida) Perestenko ex O.N.Selivanova & G.G.Zhigadlova

Original publication and holotype designation: Hansen, G.I. & Lindstrom, S.C. (1984). A morphological study of Hommersandia maximicarpa gen et sp. nov. (Kallymeniaceae, Rhodophyta) from the North Pacific. Journal of Phycology 20: 476-488.

Taxonomic status: currently recognized as a distinct genus.

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.

Description: Erect, flat, flabellately lobed to one to several orders. Stipe short. Holdfast small, discoid. Perennial. Medulla thin, filamentous, some cells refractive. Subcortex of large elliptical cells, becoming progressively smaller toward cuticle. Secondary pit connections present. Carpogonial branch 3-celled, borne on supporting cell together with up to 4 clavate to irregularly lobed subsidiary cells. Post-fertilization fusion cell involving supporting and subsidiary cells, initiating numerous branched, septate connecting filaments, which contact auxiliary cells with up to 4 subglobose subsidiary cells and moniliform adventitious branches or moniliform branches only. Gonimoblast filaments developing from moniliform branches and producing branched chains of carposporangia. Cystocarps embedded, large, diffuse, elliptical. Spermatangia undescribed. Tetrasporophyte isomorphic. Tetrasporangia irregularly cruciate, scattered in cortex, attached laterally to subsurface cortical cells.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 21 Mar 2014 by M.D. Guiry.

Comments: Subtidal. Known only from the North Pacific: Aleutian Islands (Alaska) to Vancouver Island (British Columbia).

Numbers of names and species: There are 2 species names in the database at present, of which 2 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.

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

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

Verified by: 21 March 2014 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42642

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 January 2019.

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