Cyrtophora Pascher, 1911
Holotype species: Cyrtophora pedicellata Pascher
Original publication and holotype designation: Pascher, A. (1911). Cyrtophora, eine neue tentakeltragende Chrysomonade aus Franzensbad und ihre Verwandten. Berichte der deutsche botanischen Gesellschaft 29: 112-125, 1 text-fig, pl. IV.
Request PDFDescription: Cell broadly conical to tetrahedral, the broad, rounded triangular apical end flattened, with a single flagellum protruding centrally. Six (rarely 7 or 8) long, slender tentacles possibly supported by microtubuli form a basket from the periphery (Pascher (1911) reports the tentacles to be supported by an "achsenstab", but no EM investigations are available to confirm the presence of e. g. microtubular triplets); tentacles tapering from their bases, but with blunt distal ends. Length of both the flagellum and the tentacles is 2.5-3 times the cell body length (i. e. the peduncle not included). The cell is sessile being attached to the substratum by a contractile peduncle extending from the pointed posterior end.When contracting, the cytoplasm of the stalk is withdrawn into the basal part of the cell body. In addition to its characteristic shape, the only described species C. pedicellata is fairly large (cell body length 18-20, &m, tentacles and flagellum 40-60 &m, and peduncle 50-80 &m when extended). The single golden brown chloroplast is cup shaped with 2 or 3 lobes following the triangular form of the cell. The nucleus is median and a contractile vacuole is situated centrally just below the flattened apical cell surface. Nutrition is mixotrophic, nutrient particles being taken up at the apical surface by means of small pseudopodia. Cell division takes place in a free-swimming phase; sexual reproduction not known. C. pedicellata is a freshwater sessile organism, attached to various substrates, rare; Europe.
Information contributed by: J. Throndsen . The most recent alteration to this page was made on 2021-10-08 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: 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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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=44731
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 April 2024
