Erythrocystis J., 1876
Holotype species: Erythrocystis grevillei J.Agardh
Currently accepted name for the type species: Erythrocystis saccata (J.Agardh) P.C.Silva
Original publication and holotype designation: Agardh, J.G. (1876). Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Volumen tertium: de Florideis curae posteriores. Part 1. pp. [ii*-iii*], [i]-[viï], -724. Lipsiae [Leipzig]: C.W.K. Gleerup.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Monotypic when first introduced. The type is an illegitimate substitute name for Lomentaria? saccata J.Agardh (=Erythrocystis saccata (J.Agardh) P.C.Silva. - (26 Jan 2017) - M.D. Guiry
Description: Thallus hemiparasitic on Laurencia, occasionally on Chondria; a cylindrical upright branch on host, becoming hollow distally, attached by a single large rhizoidal cell (sometimes more according to Goff 1982) that deeply penetrates host; hollow thallus becomes an obpyriform to ellipsoidal vesicle, up to 3.5 cm long. Axis polysiphonous, soon obscured by division into 2-3 layers of corticating tissue; apical cell initiating colorless, deciduous mostly simple trichoblasts on most segments; adventitious trichoblasts sometimes formed. Axis may also have a few adventitious polysiphonous branches. Reproductive structures in mostly distal sori on thallus. Male capitula replacing trichoblasts, in sori on thallus surface; cylindrical to ellipsoidal with monosiphonous stalks. Procarps on 2nd cell of deciduous trichoblast, located at thallus surface; supporting cell with a 4-celled carpogonial branch and 2 sterile cell groups; cystocarps immersed in cortex, protruding from thallus surface, ostiolate. Tetrasporangia in sori developed from cortex; 2 cover cells formed before the sporangium. In the Mediterranean Sea, the Canary Islands and the warm temperate west coast of North America. Structrual and reproductive characters ally Erythrocystis as a close relative of its host, Laurencia or, more rarely, Chondria.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 26 Jan 2017 by M.D. Guiry.
Numbers of names and species: There are 3 species names in the database at present, of which 2 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: 26 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=38067
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 29 February 2020.