Galdieria Merola, 1982
Holotype species: Galdieria sulphuraria (Galdieri) Merola
Original publication and holotype designation: Merola, A., Castaldo, R., DeLuca, P., Gambardella, R., Musacchio, A. & Taddei, R. (1982 '1981'). Revision of Cyanidium caldiarum. Three species of acidophilic algae. Giornale Botanico Italiano 115: 189-195.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Yoon, H.S., Nelson, W., Lindstrom, S.C., Boo, S.M., Pueschel, C., Qiu, H. & Bhattacharya, D. (2016). Rhodophyta. In: Handbook of the Protists. (Archibald, J.M, Simpson, A.G.B. & Samovits, C.H. Eds), pp. [1-45]. Cham, Switzerland: Springer International Publishing.
Description: Spherical unicells, sometimes united in a common mucilaginous matrix, 3-11 µm in diameter and containing a blue-green parietal, multi-lobed chloroplast which contains no pyrenoid. Contains chlorophyll a and C-phycocyanin in a chloroplast bounded by a putative single membrane. Each cell has one nucleus but, unlike other members of the class, several mitochondria and vacuolar system. Produces floridoside and iso-floridoside, confirming its status as a red alga. Storage product floridean starch. Sexual reproduction not reported.
Information contributed by: R.G. Sheath. The most recent alteration to this page was made on 6 Feb 2017 by M.D. Guiry.
Comments: In acidic thermal springs in Naples, Italy, Mt. Lawu, Indonesia, Yellowstone National Park, U.S.A. and Los Azufres and Cerro Prieto, Mexico. Survives temperatures up to 56%C and extreme acidity down to 1.5. Included in Cyanidiophyceae by Merola and others (1981) because of unique chloroplast envelope; considered to be the most advanced genus in this class.
Numbers of names and species: There are 5 species names in the database at present, of which 5 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.
Kumano, S. (2002). Freshwater Red Algae of the World. pp. [i-ii], i-xiv, 1-375 [p. 375 is an Addendum], pls 1-199. Bristol: Biopress Limited.
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: 06 February 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42894
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 24 January 2019.