Xanthophycomonas Scagel & J.Stein, 1961
Holotype species: Xanthophycomonas thalassoides (Scagel & J.Stein) Scagel & J.Stein
Original publication and holotype designation: Scagel, R.F. & Stein, J.R. (1961). Xanthophycomonas: A proposed change. Phycological News Bulletin 14(3/4): 11.
Request PDFDescription: Unicellular, microscopic, solitary, free-living and motile organisms. Cells ellipsoid to globular to more or less irregular with cell envelope (cell wall or membrane?) smooth and little thickened. Movement by two unequal flagella inserted at the apex or laterally in the anterior quarter of the cell. Chloroplast single, cupuliform, parietal and pale yellow-green, occupying at least half of the cell and containing a stigma; pyrenoid absent; reserves comprising oil droplets. Dimensions: cell length 10-11µm; cell width 7-10 µm; major flagellum 25 µm; minor flagellum 10 µm. Neither asexual nor sexual reproduction observed. Xanthophycomonas is known only from cultures established from a marine sample collected at 5 m depth in a fjord from British Columbia (Canada). This alga might have be considered as a prasinophyte, i.e., relative or synonym of Nephroselmis Stein, based on cell shape and especially the unequal flagella and their mode of insertion; however, the color and absence of starch place it in the Tribophyceae. The name Xanthomonas initially used Scagel and Stein (1961a) had been used previously to designate a plant pathogenic bacterium (Dowson 1939). Scagel and Stein later proposed the new name Xanthophycomonas (1961 b) but their combination was not accompanied by the basionym. Loeblich III (1967a) finally typified the species.
Information contributed by: A. Couté. The most recent alteration to this page was made on 2021-10-03 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.
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Contributors
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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=47333
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 01 May 2024
