Gracilaria, 1830, nom. et typ. cons.
Lectotype species: Gracilaria compressa (C.Agardh) Greville
Currently accepted name for the type species: Gracilaria bursa-pastoris (S.G.Gmelin) P.C.Silva
Original publication:Greville, R.K. (1830). Algae britannicae, or descriptions of the marine and other inarticulated plants of the British islands, belonging to the order Algae; with plates illustrative of the genera. pp. [i*-iii*], [i]-lxxxviii, -218, pl. 1-19. Edinburgh & London: McLachlan & Stewart; Baldwin & Cradock.
Type designated in Steentoft, M., Irvine, L.M. & Bird, C.J. (1991). Proposal to conserve the type of Gracilaria, nom. cons., as G. compressa and its lectotypification (Rhodophyta: Gracilariaceae). Taxon 40: 663-666.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Gurgel, C.F.D., Norris, J.N., Schmidt, W.E., Le, H.N. & Fredericq, S. (2018). Systematics of the Gracilariales (Rhodophyta) including new subfamilies, tribes, subgenera, and two new genera, Agarophyton gen. nov. and Crassa gen. nov. Phytotaxa 374(1): 1-23.
Description: Tetrasporangia superficial, in both unmodified cortex or in sori. Spermatangial conceptacles of the shallow cortical type only (i.e., textorii-type or the verrucosa-type sensu Yamamoto 1975, 1978, 1984). Gonimoblast filaments consisting of vacuolated cells in center towards the base, becoming elongated and highly branched towards the outside and bearing carposporangia in branched chains, the carposporangia cut off by oblique division with the carpospores terminal, maturing basipetally; tubular nutritive cells numerous, variable in diameter, connecting to outer pericarp, initially fusing with single pericarp cell that may fuse progressively with neighboring pericarp cells, extending the length of the tubular nutritive cells to form a tube-shaped pericarp fusion cell that sometimes leaves behind remnant pit connections; carpogonial fusion cell with numerous enlarged nuclei, extending moderately through fusion with adjoining inner pericarp cell, becoming embedded longitudinally in the inner pericarp; cystocarp cavity formed schizogenously as the gonimoblasts grow by the dissolution of pit connections between inner and outer gonimoblast filaments; inner pericarp composed of straight cell rows, five to seven cells long, in which each cell contains an enlarged nucleus; fusion cell persisting or disintegrating at the mature stages of cystocarp development.
Information contributed by: Gurgel <i>et al.</i> 2018. The most recent alteration to this page was made on 7 Aug 2019 by M.D. Guiry.
Numbers of names and species: There are 285 species names in the database at present, as well as 56 infraspecific names. Of the species names, 170 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: 01 January 2001 by M.D. Guiry
Verified by: 07 August 2019 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=14
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 15 December 2019.