Chloromonas, 1899-1900, nom. cons.
Holotype species: Chloromonas reticulata (Goroschankin) Gobi
Original publication and holotype designation: Gobi, C. (1899-1900). Über einen neuen parasitischen Pilz, Rhizidiomyces ichneumon nov. sp., und seinen Nährungsorganismus Chloromonas globulosa (Perty). Scripta Botanica Horti Universitatis Imperialis Petropolitani 15: 251-272.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Massjuk, N.P., Lilitska, G.G. & Kapustin, D.O. (2011). Chlamydomonadales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 157-218. Ruggell: A.R.A. Gantner Verlag K.-G..
Proschold et al., 2001 note that the polyphyletic Chloromonas can be legitimized as a monophyletic genus by restriction to the Chloromonas clade and they emend it on the basis of chloroplast characters (the clade contains strains with or without pyrenoids). Hoham et al. (2002: 1060) note that in the clade Chloromonas constructed byProschold et al., the relationship between the two types of chloroplast could not be resolved using 18S rDNA. They include several Chloromonas snow taxa (unavailable to the Proschold group) in their study and these fall into the Proschold et al. (2001) Chloromonas clade. - (3 Oct 2011) - Wendy Guiry
Description: Unicellular thalli spherical, ovoid, cylindrical or spindle-shaped. Some species exhibit asymmetry of cell shape. Two isokont, anterior flagella. Single, large chloroplast ranges from cup-shaped to laminate. Chloroplast often lobed or perforate (C. perforata). Pyrenoids absent. Papillum absent or present depending on the species. Eyespot prominent in most species (rarely absent), at cell anterior embedded in chloroplast. Nucleus single and typically central. First division longitudinal, sometimes preceded by rotation (depending on the species). Asexual reproduction by zoosporogenesis. Two to four zoospores produced. Palmella and akinete stages have been reported. Sexual reproduction isogamous, anisogamous, or oogamous. Quadriflagellate planozygotes may remain motile for long periods prior to the formation of the zygote wall. Zygote germinates to produce 4 or 8 zoospores. Diagnosis emended by Pröschold et al. (2001: 285). Emend. Wille (Hoham et al. 2002).
Information contributed by: M. Buchheim. The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.
Comments: Chloromonas widespread in freshwater. Habitats include soil, temporary pools and eutrophic lakes. Cell wall in zoospores of Chloromonas (published as Chlamydomonas) rosae of the type II lattice similar to Brachiomonas, Chlorogonium, Polytoma, Carteria and some species of Chlamydomonas. The lack of pyrenoids in Chloromonas is the only distinguishing feature separating it from Chlamydomonas. Ettl recently transferred numerous species from the genus Chlamydomonas to Chloromonas. No molecular or biochemical data are available
Numbers of names and species: There are 139 species names in the database at present, as well as 11 infraspecific names. Of the species names, 114 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.
Hoham, R.W., Bonome, T.A., Martin, C.W. & Leebens-Mack, J.H. (2002). A combined 18S rDNA and rbcL phylogenetic analysis of Chloromonas and Chlamydomonas (Chlorophyceae, Volvocales) emphasizing snow and other cold-temperature habitats. Journal of Phycology 38: 1051-1064.
Pröschold, T., Marin, B., Schlösser, U.W. & Melkonian, M. (2001). Molecular phylogeny and taxonomic revision of Chlamydomonas (Chlorophyta). I. Emendation of Chlamydomonas Ehrenberg and Chloromonas Gobi, and descripription of Oogamochlamys gen. nov. and Lobochlamys gen. nov. Protist 152: 265-300, 7 figs, 5 tables.
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: 11 April 2002 by M.D. Guiry
Verified by: 19 October 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43373
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 23 October 2020.