Chlorangiella De Toni, 1889

Holotype species: Chlorangiella pygmaea (Ehrenberg) P.C.Silva

Original publication and holotype designation: De Toni, G.B. (1889). Sylloge algarum omnium hucusque cognitarum. Vol. I. Chlorophyceae. pp. [3]-12, [i]-cxxxix, 1-1315. Patavii [Padua]: Sumptibus auctoris.

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Description: Thalli unicellular or colonial with cells terminal on unbranched or branched mucilaginous stalks to ca 5 times cell length. Thalli develop from zoospores that attach by apical end, lose flagella and secrete stalk. Cells with persistant contractile vacuoles at apical end, whereas stigma may or may not persist. Cells 5-42 x 3-19 µm, elliptic or ovate to egg-shaped, one species flattened at anterior. Cells uninucleate; single or multiple chloroplasts parietal and band shaped; single pyrenoid present or absent. Asexual reproduction by division of vegetative cells into 2-4 (-8) zoospores; apical rupture of sporangium results in dispersal of spores or spores may reattach at base of sporangium and initiate new stalks. Zoospores 11-29 x 5-9 µm. C. basiannulata forms akinetes 24-35 µm long. Sexual reproduction unknown. Chlorangiella epiphytic on algae or epizoic on crustaceans in freshwater; reported from Europe, North America and Asia mostly in temperate conditions although some species also tropical. Species distinguished based on differences in cell size and form, chloroplast structure and form of the stalk. Thalli unicellular or colonial with cells terminal on unbranched or branched mucilaginous stalks to ca 5 times cell length. Thalli develop from zoospores that attach by apical end, lose flagella and secrete stalk. Cells with persistant contractile vacuoles at apical end, whereas stigma may or may not persist. Cells 5-42 x 3-19 µm, elliptic or ovate to egg-shaped, one species flattened at anterior. Cells uninucleate; single or multiple chloroplasts parietal and band shaped; single pyrenoid present or absent. Asexual reproduction by division of vegetative cells into 2-4 (-8) zoospores; apical rupture of sporangium results in dispersal of spores or spores may reattach at base of sporangium and initiate new stalks. Zoospores 11-29 x 5-9 µm. C. basiannulata forms akinetes 24-35 µm long. Sexual reproduction unknown. Thalli unicellular or colonial with cells terminal on unbranched or branched mucilaginous stalks to ca 5 times cell length. Thalli develop from zoospores that attach by apical end, lose flagella and secrete stalk. Cells with persistant contractile vacuoles at apical end, whereas stigma may or may not persist. Cells 5-42 x 3-19 µm, elliptic or ovate to egg-shaped, one species flattened at anterior. Cells uninucleate; single or multiple chloroplasts parietal and band shaped; single pyrenoid present or absent. Asexual reproduction by division of vegetative cells into 2-4 (-8) zoospores; apical rupture of sporangium results in dispersal of spores or spores may reattach at base of sporangium and initiate new stalks. Zoospores 11-29 x 5-9 µm. C. basiannulata forms akinetes 24-35 µm long. Sexual reproduction unknown. Chlorangiella epiphytic on algae or epizoic on crustaceans in freshwater; reported from Europe, North America and Asia mostly in temperate conditions although some species also tropical. Species distinguished based on differences in cell size and form, chloroplast structure and form of the stalk. Thalli unicellular or colonial with cells terminal on unbranched or branched mucilaginous stalks to ca 5 times cell length. Thalli develop from zoospores that attach by apical end, lose flagella and secrete stalk. Cells with persistant contractile vacuoles at apical end, whereas stigma may or may not persist. Cells 5-42 x 3-19 µm, elliptic or ovate to egg-shaped, one species flattened at anterior. Cells uninucleate; single or multiple chloroplasts parietal and band shaped; single pyrenoid present or absent. Asexual reproduction by division of vegetative cells into 2-4 (-8) zoospores; apical rupture of sporangium results in dispersal of spores or spores may reattach at base of sporangium and initiate new stalks. Zoospores 11-29 x 5-9 µm. C. basiannulata forms akinetes 24-35 µm long. Sexual reproduction unknown.

Information contributed by: D. Garbary. The most recent alteration to this page was made on 2017-03-21 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Masjuk, N.P. & Lilitska, G.G. (2011). Volvocales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 218-225. Ruggell: A.R.A. Gantner Verlag K.-G..

Comments: Chlorangiella epiphytic on algae or epizoic on crustaceans in freshwater; reported from Europe, North America and Asia mostly in temperate conditions although some species also tropical. Species distinguished based on differences in cell size and form, chloroplast structure and form of the stalk.

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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=45043

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 March 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 10 August 2022

 
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