Paralemanea (P.C.) Vis & Sheath, 1992
Holotype species: Lemanea nodosa Kützing
Currently accepted name for the type species: Paralemanea catenata (Kützing) M.L.Vis & R.G.Sheath
Original publication and holotype designation: Vis, M.L. & Sheath, R.G. (1992). Systematics of the freshwater red algal family Lemanaceae in North America. Phycologia 31(2): 164-179.
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.
Based on Lemanea subg. Paralemanea P.C.Silva, Taxon 8: 62, 1959 - (5 Oct 2010) - M.D. Guiry
Description: Tufts of cartilaginous, tubular, pseudoparenchymatous gametophytic thalli with cortical filaments around central uniseriate axis, and simple ray cells not abutting outer cortical cells. Mean length 4.3-9.5 cm and diam. 0.5-0.7 mm. Species characterized by presence of branching, length and diameter. Several, parietal, discoid chloroplasts in outer cells only. Spermatangia develop as yellowish nodal rings. Small carpogonial branches entirely internal except thin trichogyne protrudes beyond outer layer. Carposporophytes small, spherical masses of filaments forming large, ellipsoidal carpospores in central cavity; released by thallus deterioration and germinating into branched, uniseriate chantransia (= pseudochantransia) filaments. Chantransia stage produces attached gametophyte seasonally after meiosis. Wall components of P. annulata include xylan, non-sulfated 3- or 3,4-linked _-galactosyl residues alternating with 4-linked -glucuronosyl residues, and small quantities of cellulose, associated lipid and protein (mostly threonine and alanine).
Information contributed by: R.G. Sheath. The most recent alteration to this page was made on 23 Apr 2014 by M.D. Guiry.
Comments: Most populations of Paralemanea in North America are from southeastern U.S.A. and northern California, but extends from central Mexico to New York. Wide range of conditions: mean current velocity 18-110 cm s-1, temp. 4-17%C, pH 5.5-8.6, specific conductance 42-500 &S cm-1. Predominant in cool seasons in a North Carolina stream.
Numbers of names and species: There are 14 species names in the database at present, as well as 1 infraspecific names. Of the species names, 12 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: 23 April 2014 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42776
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 14 November 2018.