Kephyrion Pascher, 1911
Holotype species: Kephyrion sitta Pascher
Original publication and holotype designation: Pascher, A. (1911). Über Nannoplanktonten des Süßwassers. Berichte der deutsche botanischen Gesellschaft 29: 523-533, pl. XIX [figs 14-24].
Request PDFDescription: Small planktonic monads with one visible flagellum and one chloroplast, often with a stigma. Cell is attached inside a bottle- or jar-shaped lorica, the shape of which is used as taxonomic criterion. Species the lorica of which are provided with annular or spiral ridges are often classified as an independent genus Stenocalyx Schiller. Reproduction by longitudinal division of the cell; one daughter cell leaves and constructs its own new lorica. In some cases a sort of budding has been observed, and the new lorica is excreted when the daughter cell is still in cytoplasmic connection with the mother cell. In this way also few-celled colonies may be formed. Sexual reproduction observed in several species as isogamy (hologamic fusion), and the loricas of the 2 gametes remain attached to the zygote. Stomatocysts are placed on top of the lorica. Found mostly in freshwater ponds, certainly cosmopolitan. Possibly several of the species, after careful observation, will prove to have 2 visible flagella and thus must be transferred to the genus Pseudokephyrion. Bourrelly (1957), by careful observations, consistently found 2 flagella (the second very small) in every cell he first thought might belong to Kephyrion.
Information contributed by: J. Kristiansen. The most recent alteration to this page was made on 2022-01-22 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: Kristiansen & Preisig (2001: 9) record this genus as alternately being a member of the family Chrysococcaceae Lemmerman 1899. 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=44158
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 22 January 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024
