Pseudokephyrion Pascher, 1913
Holotype species: Pseudokephyrion undulatum (G.A.Klebs) Pascher
Original publication and holotype designation: Pascher, A. (1913). [Flagellatae II.] Chrysomonadinae. In: Die Süsswasserflora Deutschlands, Österreichs und der Schweiz. Heft 2. (Pascher, A. & Lemmermann, E. Eds), pp. [i-iv], 1-95. Jena: Verlag von Gustav Fischer.
Request PDFDescription: Small, solitary, loricate monads. Lorica flask-bowl-shaped, smooth or with annular or spiral thickenings, hyaline or impregnated with iron salts. Cell not fastened to the lorica; it has 2 unequal flagella, and one parietal chloroplast, often with stigma. Reproduction by longitudinal division or by budding. Sexual reproduction by isogamy; the empty loricae remain attached to the zygote wall. Stomatocysts (parthenospores) are also present. Found in nanoplankton in freshwater ponds, widely distributed. There is a considerable degree of parallelism in loricashape between species in this genus and Kephyrion, and it is likely that many species first described as the uniflagellate Kephyrion are identical with species which by later examination proved to have 2 flagella. Bourrelly (1957), by careful scrutiny, did not find any cells with only one flagellum.
Information contributed by: J. Kristiansen. The most recent alteration to this page was made on 2023-06-16 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 neuter.
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.
Comments: Throndsen (1997: 619) record this genus as being a member of the Family Chrysococcaceae and Order Ochromonadales.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=44165
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 16 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024
