Holotype species: Chamaebotrys boergesenii (Weber Bosse) Huisman
Original publication and holotype designation: Huisman, J.M. (1996). The red algal genus Coelarthrum Børgesen (Rhodymeniaceae, Rhodymeniales) in Australian seas, including the description of Chamaebotrys gen. nov. Phycologia 35: 95-112.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as masculine.
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.
According to Art. 62 [Melbourne Code] compounds ending in "-botrys" are masculine - (15 Aug 2017) - M.D. Guiry
Description: Thallus decumbent, generally attached to the substratum at many points, segmented, dichotomously, trichotomously or irregularly branched, often anastomosing secondarily with adjacent axes; segments spherical to ovoid, composed of an outer cellular layer and an inner cavity filled with a watery mucilage; construction multiaxial, cortex of 1-3 layers of small cells formed in rosettes around subcortical cells, medulla of larger, relatively colourless, pseudoparencymatous cells bearing secretory cells directly or on special stellate cells. Spermatangia, early stages of carpogonial branch and gonimoblast development unknown. Gonimoblast developing outwards, most cells being transformed to carposporangia in 2-3 lobes of different ages; cystocarps ostiolate, protruding outwards, tela arachnoidea absent but inner cells of pericarp often remaining stellate. Tetrasporangia generally formed in a terminal position from cortical cells, aggregated in nemathecial sori, spores regularly cruciately arranged.
Information contributed by: M.D. Guiry. The most recent alteration to this page was made on 15 Aug 2017 by M.D. Guiry.
Comments: Chamaebotrys boergesenii was formerly referred to Coelarthrum; this latter genus (q.v.) is different from Chamaebotrys in habit and in the formation of tetrasporangia in an intercalary position (Huisman 1996). C. boergesenii is widely distributed in the warmer waters of the Indian and Pacific Oceans, although Huisman (1996) cautions against acceptance of these records without re-examination of the specimens in question. C. lomentariae (Tanaka and K. Nozawa) Huisman from Japan, but only from the type collection, is very similar to the type species and may be conspecific (Huisman 1996). C. prolifera from Puerto Rico is found in shallow water, and is the only species known from the Caribbean Sea and Atlantic Ocean.
Numbers of names and species: There are 4 species names in the database at present, as well as 1 infraspecific names. Of the species names, 4 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.
Filloramo, G.V. & Saunders, G.W. (2016). Application of multigene phylogenetics and site-stripping to resolve intraordinal relationships in the Rhodymeniales (Rhodophyta). Journal of Phycology 52(3): 339-355.
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: 15 August 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42992
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 20 March 2019.