Lectotype species: Bangia atropurpurea (Mertens ex Roth) C.Agardh
Original publication:Lyngbye, H.C. (1819). Tentamen hydrophytologiae danicae continens omnia hydrophyta cryptogama Daniae, Holsatiae, Faeroae, Islandiae, Groenlandiae hucusque cognita, systematice disposita, descripta et iconibus illustrata, adjectis simul speciebus norvegicis. pp. [i]-xxxii, -248, 70 pls. Hafniae [Copenhagen]: typis Schultzianis, in commissis Librariae Gyldendaliae.
Type designated in Pfeiffer, L. (1871-1873). Nomenclator botanicus. Nominum ad finem anni 1858 publici juris factorum, classes, ordines, tribus, familias, divisiones, genera, subgenera vel sectiones designantium enumeratio alphabetica. Adjectis auctoribus, temporibus, locis systematicis apud varios, notis literariis atque etymologicis et synonymis. Vol. 1 pp. [i-vi], -808. Cassellis [Cassel]: Sumptibus Theodori Fischeri [Theodor Fischer].
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Silva, P.C. & Nelson, W.A. (2008). History of the typification of conserved and rejected names, including an account of the typification of Bangia Lyngb. (Bangiaceae, Rhodophyta). Taxon 57: 1351-1354.
Description: Filiform, unbranched cylinders of cells embedded in firm gelatinous matrix. Attached by down-growing rhizoids, usually in dense purple-black to rust-colored clumps. Initial uniseriate filament (10-30 µm in dimeter) becoming multiseriate or tubular at maturity (60-6000 µm in diameter). Cell number and filament length highly correlated in uniseriate filaments; filament lengths: 0.2-35 cm. Vegetative cells contain a large, axial, stellate chloroplast with prominent pyrenoid. Apical region differentiates into spermatangia, carpogonia or monosporangia. Male plants produce packets of 32-128 colorless spermatia; females bright red with packets of 8-16 zygotosporangia; asexual plants grey-red to rust-colored. During sexual differentiation sulphated polysaccharide staining in walls decreases. Zygotospores germinate into conchocelis-phase irregularly branched, uniseriate filaments that bore into shells. Conchospores germinate into gametophytic stages. Exact site of meiosis not known.
Information contributed by: R.G. Sheath, modified by M.D. Guiry. The most recent alteration to this page was made on 29 Oct 2010 by M.D. Guiry.
Comments: Cosmopolitan marine upper intertidal zone-forming species of subtropical to boreal coastlines. Marine populations in the Atlantic are common food for the periwinkle Littorina littorea. Bangia is opportunistic, having small thalli with rapid growth and high reproductive output (r-selection). Separate asexual populations are long-lived, producing several generations year-round; sexual plants are more like seasonal annuals. B. fuscopurpurea can tolerate drying for 15 days.
Filament diameter and karyotype are best taxonomic characteristics. B. fuscopurpurea has n = 2-4; B. vermicularis n = 3 or 4 (10). Ultrastructurally gametophytic stages have most organelles restricted to small fraction of cytoplasm peripheral to chloroplast. Thylakoids single with no peripheral, encircling one; salinity shock may disrupt. Chloroplast division prior to cytokinesis. Mature spermatia contain reduced chloroplasts (no pyrenoids, no phycobilisomes), nuclei with only condensed chromatin, degenerate mitrochondria, numerous vesicles and ribosomes. Conchocelis phase contains ribbon-shaped chloroplast with peripheral, encircling thylakoid. Thylakoids fragment and dilate into tubular units after prolonged darkness. Pit plugs have 1 cap layer.
Numbers of names and species: There are 101 species names in the database at present, as well as 46 infraspecific names. Of the species names, 16 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.
Sheath, R.G. (2003). Red Algae. In: Freshwater Algae of North America, Ecology & Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 197-224. San Diego: Academic Press.
Sutherland, J.E., Lindstrom, S.C., Nelson, W.A., Brodie, J., Lynch, M.D., Hwang, M.S., Choi, H.-G., Miyata, M., Kikuchi, N., Oliveira, M.C., Farr, T., Neefus, C., Mols-Mortensen, A. Milstein, D. & Müller, K.M. (2011). A new look at an ancient order: generic revision of the Bangiales (Rhodophyta). Journal of Phycology 47(5): 1131-1151.
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: 29 December 2000 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33891
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 18 August 2019.