Chlorodesmis W.H.& J.W. , 1841
Holotype species: Chlorodesmis comosa Harvey & Bailey
Currently accepted name for the type species: Chlorodesmis fastigiata (C.Agardh) S.C.Ducker
Original publication and holotype designation: Harvey, W.H. & Bailey, J.W. (1851). [Dr. Gould presented, in behalf of Professors W.H. Harvey of Trinity College, Dublin, and J.W. Bailey of West Point, descriptions of seventeen new species of Algae collected by the United States Exploring Expedition...]. Proceedings of the Boston Society of Natural History 3: 370-373.
Taxonomic status: currently recognized as a distinct genus.
Description: Thalli occur in caespitose clumps or brush-like aggregates on elongated stipes, the clumps to 10-20 cm. wide and 17 cm. tall. Fronds of numerous, non-septate, dichotomous siphons 75-515 µm in diameter, containing numerous nuclei, and both chloroplasts and amyloplasts (i.e. heteroplastic); pyrenoids absent, and crystalline inclusions of unknown composition and function present or absent. Anchorage is by a felted mass of colorless siphons and entangled adventitious rhizoids, which in stipitate species coalesce into a stalk composed mostly of colorless rhizoids thinner in diameter than the unconsolidated photosynthetic siphons. Distal siphons constricted at one or both sites above dichotomies. Reproductive structures are known for two species, but are very different, suggesting that Chlorodesmis, at present, may be an aggregate of more than one genus. In C. baculifera zooids are released from zooidangia formed in grape-like clusters on short stalks borne along vegetative siphons. In C. major the distal few mm. of every siphon differentiate into a zooidangium, while the remainder of the thallus becomes bleached and presumably dies back after zooid release. Fertility in C. major appears to be geared to the lunar cycle.
Information contributed by: S. D. Ducker and G. T. Kraft. The most recent alteration to this page was made on 27 Apr 2015 by M.D. Guiry.
Comments: Geographic distribution extends from the western Indian Ocean to the central and eastern Pacific Ocean. Most species are widespread, growing in tropical to subtropical waters, with extensions into temperate latitudes as well. Chlorodesmis baculifera may be restricted to southeastern Australia. Vertical range is from upper sublittoral to at least about -35m.
Numbers of names and species: There are 18 species names in the database at present, of which 11 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):
Chlorodesmis australis Womersley S
Chlorodesmis baculifera (J.Agardh) Ducker C
Chlorodesmis bulbosa (Womersley) Ducker S
Chlorodesmis caespitosa J.Agardh C
Chlorodesmis comosa Harvey & Bailey S - type
Chlorodesmis dotyi Trono C
Chlorodesmis fastigiata (C.Agardh) S.C.Ducker C
Chlorodesmis formosana Yamada S
Chlorodesmis haterumana Tanaka & Itono C
Chlorodesmis hildebrandtii A.Gepp & E.S.Gepp C
Chlorodesmis major Zanardini C
Chlorodesmis mexicana W.R.Taylor C
Chlorodesmis pachypus Kjellman C
Chlorodesmis papenfussii Ducker C
Chlorodesmis pusilla Womersley S
Chlorodesmis sinensis C.K.Tseng & M.L.Dong C
Chlorodesmis torresiensis W.R.Taylor S
Chlorodesmis vaucheriiformis Harvey S
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: 27 April 2015 by M.D. Guiry
Linking to this page: http://algaebase.org/search/genus/detail/?genus_id=T7d4e4293a94df9f4
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 15 December 2017.