Campylomonas D.R.A.Hill, 1991

Holotype species: Campylomonas reflexa (M.Marsson) D.R.A.Hill

Currently accepted name for the type species: Cryptomonas pyrenoidifera Geitler

Original publication and holotype designation: Hill, D.R.A. (1991). A revised circumscription of Cryptomonas (Cryptophyceae) based on examination of Australian strains. Phycologia 30: 170-188, 40 figs, 2 tables.

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Description: Free-swimming biflagellate monads that do not form mucilaginous, palmelloid colonies; with a characteristic recurved posterior giving an almost sigmoid appearance from lateral view. A longitudinal furrow extends posteriorly from the vestibulum and transforms into a sack-like gullet lined with many rows of ejectisomes. Two chloroplasts, pyrenoids and nucleomorphs; the chloroplasts contain the phycobiliprotein Cr-phycoerythrin 566 and vary in color from olive-green to brown and yellow in older cells. Periplast with a laminate inner component and superficial layer of fine fibrils. Sexual reproduction is unknown, reproduction being by simple cell division. Cysts are unknown. The ultrastructure has been examined. The porous inner periplast component sheet lies a short distance below the plasma membrane with ejectisome vesicles occupying the pores and providing contact with the plasma membrane. The nucleomorphs are not associated with the pyrenoids. The pyrenoids are unusually flattened, sometimes lobed, and not easily observed in the light microscope. The pyrenoidal matrices are not traversed by thylakoids. Flagellar apparatus has a rhizostyle with a curved band of microtubules with several laminate keels associated with the convex margin. Campylomonas is cosmopolitan and common in freshwater habitats, including temporary ponds, rivers and lakes. Presently with only a single species, but after taxonomic revision it is likely that many (ca. 20) species of Cryptomonas will be transferred to this genus. The two genera are distinguished by periplast and flagellar apparatus structure and cell shape.

Information kindly contributed by D.R.A. Hill but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Cryptomonas.

Most recent taxonomic treatment adopted: Hoef-Emden, K. & Melkonian, M. (2003). Revision of the genus Cryptomonas (Cryptophyceae): a combination of molecular phylogeny and morphology provides insights into a long-hidden dimorphism. Protist 154: 371-409, 34 figs, 4 tables.

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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.

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 26 May 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 December 2024