Polyblepharides P.A.Dangeard, 1888

Holotype species: Polyblepharides singularis P.A.Dangeard

Original publication and holotype designation: Dangeard, P.-A. (1888). Recherches sur les algues inférieures. Annales des Sciences Naturelles, Botanique, série 7 7: 105-175.

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Description: Unicellular flagellate with 8 flagella, although a variable number (6-8) was mentioned in the original description. Cells ovoid, tapering posteriorly, anteriorly usually with a slight depression. Apparently wall-less. Each cell contains a single cup-shaped chloroplast with an axial pyrenoid surrounded by several starch grains. An eyespot is located in the anterior half of the cell. Contractile vacuoles appear near the flagellar bases, 2 or 4 have been reported in recent literature. The cells may form thick-walled resting stages, each germinating with a single cell. Sexual reproduction unknown. The 2 known species occur typically in small bodies of fresh water like rainwater puddles or small ponds. The ultrastructure of the two known species has not been studied and their phylogenetic relationships remain unknown. They differ somewhat in size but may be conspecific. The genus was described in detail by Huber-Pestalozzi (1961), and more recent findings were given by Ettl (1983) who included in the genus octoflagellated members of the prasinophyte Pyramimonas. Unicellular flagellate with 8 flagella, although a variable number (6-8) was mentioned in the original description. Cells ovoid, tapering posteriorly, anteriorly usually with a slight depression. Apparently wall-less. Each cell contains a single cup-shaped chloroplast with an axial pyrenoid surrounded by several starch grains. An eyespot is located in the anterior half of the cell. Contractile vacuoles appear near the flagellar bases, 2 or 4 have been reported in recent literature. The cells may form thick-walled resting stages, each germinating with a single cell. Sexual reproduction unknown. The 2 known species occur typically in small bodies of fresh water like rainwater puddles or small ponds. The ultrastructure of the two known species has not been studied and their phylogenetic relationships remain unknown. They differ somewhat in size but may be conspecific. The genus was described in detail by Huber-Pestalozzi (1961), and more recent findings were given by Ettl (1983) who included in the genus octoflagellated members of the prasinophyte Pyramimonas.

Information contributed by: Ø. Moestrup. The most recent alteration to this page was made on 2023-05-08 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: Masjuk, N.P. & Lilitska, G.G. (2011). Prasinophyceae. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 17-20. Ruggell: A.R.A. Gantner Verlag K.-G..

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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=45029

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 May 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 27 April 2024