Citharistes Stein, 1883
Holotype species: Citharistes regius Stein
Original publication and holotype designation: Stein, F. von (1883). Der Organismus der Infusionsthiere nach eigenen forschungen in systematischere Reihenfolge bearbeitet. III. Abtheilung. II. Hälfte die Naturgeschichte der Arthrodelen Flagellaten. pp. 1-30, pls I-XXV. Leipzig: Verlag von Wilhelm Engelmann.
Description: Medium-sized (35-70µm) flagellate with a reversed C-shaped body in lateral view. Epicone is low and disk-shaped, cingulum narrow except dorsally where it forms the large phaeosome chamber, occupying the concavity of the "C". Anterior cingular list is small and distally flared as is, according to Balech (1971b), the posterior cingular list. Phaesome chamber formed by lists of the 2 large dorsal hypothecal plates; other authors claim it is formed by cingular lists, (e. g Kofoid and Skogsberg (1928), Taylor (1976)) and has 2 ribs, one on each side of the saggittal suture of the hypothecal plates arising on the tips of the posterior shank of the horseshoe-shaped body. Only a small pore connects the phaesome chamber, in which are the symbionts, with the surrounding water. The phaesomes are blue-greens probably of the genus Synechococcus. No chloroplasts. The only specimen examined by electron microscopy showed no food vacuoles but starch-like granules in the cytoplasm. Sexual reproduction and cyst formation not known. Marine oceanic plankton, in tropical and subtropical regions, rarely reported; seem to be restricted to deeper waters.
Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2017-05-24 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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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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=44625
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 24 May 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 March 2023