Holotype species: Cruoria pellita (Lyngbye) Fries
Original publication and holotype designation: Fries, E.M. (1835). Corpus florarum provincialium Sueciae. I. Floram scanicam. pp. [i]-xxiv, -394. Upsaliae [Uppsala]: typis Palmblad, Serell & C.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Maggs, C.A. & Guiry, M.D. (1989). A re-evaluation of the crustose red algal genus Cruoria and the family Cruoriaceae. British Phycological Journal 24: 253-269, 44 figs, 3 tables.
Monotypic when first introduced. - (23 Jan 2017) - M.D. Guiry
Description: A monotypic family of one genus and two or three species. Plants are crustose, non-calcified, and consist of a single layered basal stratum from each cell of which erect, loosely aggregated filaments arise at nearly right angles to form a thick cushion. Anchoring rhizoids are absent, and neither secondary pit connections nor cell fusions are formed. Tetrasporangia are zonate, borne laterally on erect filaments, and are noteworthy for their comparitively large size. Gametophytes are monoecious. Carpogonial branches are 2-celled and lateral on ascending filamants, directly giving rise on fertilization to several connecting filaments that grow to undifferentiated auxiliary cells intercalary in separate erect filaments. Gonimoblasts arise on the connecting filaments themselves and develop both toward the interior and the surface of the thallus. Cystocarps are embedded without ostioles and consist mostly of carposporangia.
Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 23 Jan 2017 by M.D. Guiry.
Comments: Species forming Cruoria-like crusts but incorporating refractive cells and existing only as tetrasporophytes are strongly implicated as phases in the life histories of genera in other families, such as Halarachnion and Turnerella (Maggs and Guiry 1989). Distribution: The type species occurs in the eastern north Atlantic from Norway to Tangier. It is the most abundant subtidal non-calcified encrusting red alga in the British Isles (Maggs and Guiry 1989). A second species, C. cruoriaeformis (P. and H. Crouan), occurs on maerl in Britain, France, and possibly Corsica.
Numbers of names and species: There are 26 species names in the database at present, as well as 1 infraspecific names. Of the species names, 7 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: 29 December 2000 by M.D. Guiry
Verified by: 23 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=103
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 23 May 2019.