Holotype species: Tuomeya fluviatilis Harvey
Currently accepted name for the type species: Tuomeya americana (Kützing) Papenfuss
Original publication and holotype designation: Harvey, W.H. (1858). Nereis Boreali-Americana: or, contributions to a history of the marine Algae of North America. Part III. Chlorospermeae. Smithsonian Contributions to Knowledge 10(2): 1-140, pls 37-50.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: 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.
Tuomeya (Harvey) O. Necchi Jr. & T.J. Entwisle 1990: 485: section of Batrachospermum (INA). - (1 Aug 2012) - Wendy Guiry
Description: Densely branched, cartilaginous and cylindrical gametophytic thallus, 1-5 (-6.5) cm long. Blue-green, olive or black. Uniseriate axis, covered by 2-3 layers of cortical filaments; dense laterals arising from ca. 6 pericentral cells, of limited growth with outer cells fused. Axial cells evident in mature branches by constrictions. Spermatangia formed at tips of laterals. Carpogonia asymmetrical with irregularly broadened trichogyne attached obliquely or perpendicularly to a stalk; borne on a curved carpogonial branch derived from a pericentral cell. Carposporophyte a globular mass of filaments. Carpospores germinating into branched, uniseriate chantransia (= pseudochantransia) stage in culture but in situ gametophytes develop form an undifferentiated mass of cells. Chromosome number n = ca. 8. Ultrastructure of chantransia filaments typical of florideophytes.
Information contributed by: R.G. Sheath. The most recent alteration to this page was made on 3 Jan 2012 by M.D. Guiry.
Comments: Scattered freshwater streams in eastern North America, Florida to Newfoundland from fall to early summer. Range of conditions: 5-26°C, current velocity 16-125 cm s-1, pH 4.7-7.6, specific conductance 10-124 mS cm-1. Tolerates considerable stress before breaking (1780 Å 850 kN m-2), stretching 22% in the process. Common in guts of grazing amphipods, and insect larvae; its cartilaginous structure and low protein contents make it little preferred as a food source.
Considered to be a section of Bactrachospermum by Necchi and Entwisle (1990), but questioned by Kaczmarczyk and others (1992).
Numbers of names and species: There are 5 species names in the database at present, of which 1 has 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.
Kaczmarczyk, D., Sheath, R.G. & Cole, K.M. (1992). Distribution and systematics of the fresh water genus Tuomeya (Rhodophyta, Batrachospermaceae). Journal of Phycology 28: 850-855.
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
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42774
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 13 December 2018.