Gloeotilopsis Iyengar & Philipose, 1956

Holotype species: Gloeotilopsis planctonica M.O.P.Iyengar & Philipose

Original publication and holotype designation: Iyengar, M.O.P. & Philipose, M.T. (1956). Gloeotilopsis planctonica gen. et sp. nov., a new member of the Ulotrichaceae. Journal of the Indian Botanical Society 35: 365-370, 27 figs.

Description: Filaments short, 2-16 celled, unbranched and uniseriate, readily fragmenting, without mucilaginous sheath, free-floating. Cell wall thin and hyaline. Cells cylindrical, elongated, with broadly rounded ends causing cells to adhere with their poles. Chloroplast single and plate-like, occupying almost entire cell length and extending to nearly 3/4 of circumference, with one or occasionally two pyrenoids. Asexual reproduction by biflagellate zoospores, arising 1-8(-16) per ordinary cell, discharged through median rupture of lateral cell wall. Remnants of emptied contiguous zoosporangia apparent as H-shaped fragments. Zoospores ovate with small anterior papilla enclosing cup-shaped parietal chloroplast with single pyrenoid and median stigma. Aplanospores often replacing zoospore formation. Vegetative multiplication by disintegration of filaments into short fragments, often into unicells. Method of sexual reproduction unknown. Gleotilopsis recorded twice; in freshwater plankton from India and as terrestrial from United States. Gleotilopsis shows light microscopic features with several filamentous klebsormidiacean/ulotrichacean algae (Stichococcus, Klebsormidium, Gleotila, Ulothrix). Cell division, involving conspicuous band of metaphase microtubules and of unilateral septum growth associated with a phycoplast, justifies its distinct status.

Information contributed by: G. M. Lokhorst. The most recent alteration to this page was made on 2012-07-11 by Michael Guiry.

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

Most recent taxonomic treatment adopted: Burova, O.V., Tsarenko, P.M., Kovalenko, O.V., Mikhailyuk, T.I., Petlovany, O.A., Lilitska, G.G. & Bilous, O.P. (2011). Ulvophyceae. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 20-61. 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44552

Citing AlgaeBase
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 11 July 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024