Gloeotilopsis& Philipose, 1956: 369
Holotype species: Gloeotilopsis planctonica 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.
Taxonomic status: currently recognized as a distinct genus.
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.
NCBI Nucleotide Sequences
Numbers of names and species: There are 4 species (and infraspecific) names in the database at present, of which 4 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Friedl, T. & O'Kelly, C.J. (2002). Phylogenetic relationships of green algae assigned to the genus Planophila (Chlorophyta): evidence from 18S rDNA sequence data and ultrastructure. European Journal of Phycology 37: 373-384.
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: http://www.algaebase.org/search/genus/detail/?genus_id=44552
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 March 2014.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:6423