Polylepidomonas H.R.Preisig & D.J.Hibberd, 1983

Holotype species: Polylepidomonas vacuolata (H.A.Thomsen) Preisig & D.J.Hibberd

Original publication and holotype designation: Preisig, H.R. & Hibberd, D.J. (1983). Ultrastructure and taxonomy of Paraphysomonas (Chrysophyceae) and related genera. 3. Nordic Journal of Botany 3: 695-723.

Description: Cells free-swimming, solitary, more or less spherical in shape, being covered with siliceous scales of a single type and at the anterior end bearing 2 flagella of unequal length. Except for the presence of scales, cells closely resemble those of Ochromonas. The long flagellum has tripartite tubular hairs, the short flagellum is naked and has a swelling at the base which is closely appressed to the cell surface and the anterior end of the chloroplast. Scales are clearly visible with an electron microscope only; they are more or less elliptical and perforated by irregularly arranged linear apertures. Scales are formed within flat vesicles which are intimately associated with cistenae of rough endoplasmic reticulum in the peripheral cytoplasm. Chloroplast single, parietal; stigma lacking. Protoplast also containing a single contractile vacuole, food vacuoles and vacuoles with a storage product (probably chrysolaminaran). Reproduction and stomatocysts not observed. Occasionally found in freshwater and brackish plankton in Denmark, England,Finland, Germany, and the Netherlands.

Information contributed by: H. R. Preisig. The most recent alteration to this page was made on 2021-10-11 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=44163

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 11 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024