150,125 species and infraspecific names are in the database, 20,397 images, 57,748 bibliographic items, 380,813 distributional records.

Boergesenia J.Feldmann, 1938

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Chlorophyta infrakingdom
Phylum Chlorophyta
Subphylum Chlorophytina
Class Ulvophyceae
Order Cladophorales
Family Siphonocladaceae

Holotype species: Boergesenia forbesii (Harvey) Feldmann

Original publication and holotype designation: Feldmann, J. (1938). Sur un nouveau genre de Siphonocladacées. Compte Rendu Hebdomadaire des Séances de l’Académie des Sciences. Paris. 206: 1503-1504.

Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

Description: Thalli composed of one to many unbranched, elongate, pyriform vesicles forming incurved rosette-like clusters. Siphonous cells 2-8 mm diameter at distal ends, 1-5 cm tall. Annular constriction prominent on tapered basal ends of vesicles. Apical orientation maintained throughout development. Rhizoid well developed from which new uprights can arise. Adventitious rhizoids, tenacular cells and lenticular cells not present. Cell division by modified segregative division in main axes; by centripetal invagination in rhizoid. Cells multinucleate, with numerous discoid chloroplasts each with single pyrenoid surrounded with starch sheath and bisected by traversing thylakoids. Sexual life history unknown. Haploid and diploid chromosome counts of 14-18 and 36 reported for B. forbesii. Nuclear DNA amounts of 2.7, 4.9 and 9.5 pg (1C, 2C and 4C) estimated for B. forbesii. Boergesenia occurs only in the tropical Indo-West Pacific where it is found in very snady, coral rubble habitats. Strong water motion seems to be important although the banana-like clusters are often found in more sheltered crevices and often by themselves. Because of its large cell size, Boergesenia has been used for a wide variety of physiological, developmental and nuclear studies. The cytoskeleton and its role in cytoplasmic motility has been extensively studied.

Information contributed by: J.L. Olsen. The most recent alteration to this page was made on 29 Aug 2011 by M.D. Guiry.

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):

Boergesenia forbesii (Harvey) Feldmann C - type
Boergesenia magna Kraft C 
Boergesenia parvula D.L.Ballantine, H.Ohba & C.Lozada-Troche C 

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

Verified by: 29 August 2011 by M.D. Guiry

Linking to this page: http://algaebase.org/search/genus/detail/?genus_id=c6daaf4bf6e66a9a2

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 17 December 2017.

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