153,585 species and infraspecific names are in the database, 20,980 images, 59,387 bibliographic items, 411,011 distributional records.

Besa Setchell, 1912

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

Holotype species: Besa papillaeformis Setchell

Original publication and holotype designation: Setchell, W.A. (1912). Algae novae et minus cognitae, I. University of California Publications in Botany 4: 229-268, pls 25-31.

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: Vegetative plants consist of crusts reaching 2-3 cm in breadth. Thalli are composed of ill-defined basal layers lacking rhizoids, loosely aggregated medullary filaments, and an anticlinal cortical filaments. Gametangia are produced in short (to 1.5 mm in heigt), erect, club-shaped or papillar outgrowths. Spermatangial axes are covered with surface mother cells. Cystocarps are terminal. Tetrasporophytes are isomorphic with gametophytes. DeCew and West (1981) recommend transfer of Besa from the Phyllophoraceae, where it was placed by Kim (1976), to the Gigartinaceae because of its filamentous medullary structure. Kim had emphasized the lack of a sterile hull around the carposporophyte, the presence of a relatively large sterile lateral cell on the basal cell of the carpogonial branch, and the development of rounded to elliptical medullary cells as evidence for the alignment of Besa with the Phyllophoraceae. Gen. emend. (Calderon et al., 2016: 432, 433).

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 14 Dec 2016 by Wendy Guiry.

Comments: Distribution: The type and a second species, B. stipitata Hollenberg and Abbott, occur on rocks from intertidal to 14 m depths at scattered localities in central California. Both species are rare (Abbott and Hollenberg 1976).

Numbers of names and species: There are 7 species names in the database at present, of which 6 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
Calderon, M.S., Miller, K.A., Seo, T.H. & Boo, S.M. (2016). Transfer of selected Ahnfeltiopsis (Phyllophoraceae, Rhodophyta) species to the genus Besa and description of Schottera koreana sp. nov.. European Journal of Phycology 51(4): 431-443.

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: 28 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42460

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 16 November 2018.

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