Rhinomonas D.R.A.Hill & R.Wetherbee, 1988

Holotype species: Rhinomonas pauca D.R.A.Hill & Wetherbee

Original publication and holotype designation: Hill, D.R.A. & Wetherbee, R. (1988). The structure and taxonomy of Rhinomonas pauca gen et sp. nov. (Cryptophyceae). Phycologia 27: 355-365.

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Description: Diminutive sized (6-10 &m), perpetually swimming biflagellate monads, generally ovoid with a rhinote anterior; vestibulum located about one-third cell length from apex and closed posteriorly into a tubular gullet, the gullet is lined with usually two rows of ejectisomes; single chloroplast, pyrenoid and nucleomorph, the chloroplast with the phycobiliprotein Cr-phycoerythrin 545; periplast with internal and superficial more or less hexagonal plates. Reproduction is only known by simple cell division. Cysts are unknown and palmelloid colonies apparently are not formed. The ultrastructure has been examined. The flagella have the usual cryptophycean adornment of flagellar hairs and imbricate layer of rosulate scales. The internal periplast plates appear to be attached to the plasma membrane along the posterior margin and around the periphery; they are slightly raised anteriorly to accommodate the ejectisome vesicles. The superficial periplast plates are composed of small rod-like subunits in a crystalline arrangement and have conspicuous borders. A raphe-like structure is present at the cell posterior. The nucleomorph is located in a pyrenoidal invagination, and no thylakoids traverse the pyrenoidal matrix. Rhinomonas is known only from marine waters. It is apparently a rare genus with the type species known from only two collections in England and south-eastern Australia, and there are isolated reports of three other species from England and Japan.

Information contributed by: D.R.A. Hill. The most recent alteration to this page was made on 2017-05-26 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=46158

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 June 2024

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