Proteomonas D.R.A.Hill & R.Wetherbee, 1986
Holotype species: Proteomonas sulcata D.R.A.Hill & Wetherbee
Original publication and holotype designation: Hill, D.R.A. & Wetherbee, R. (1986). Proteomonas sulcata gen. et sp. nov. (Cryptophyceae), a cryptomonad with two morphologically distinct and alternating forms. Phycologia 25: 521-543.
Request PDFDescription: Perpetually swimming monads that occasionally alternate between dissimilar haploid and diploid forms; both forms with a longitudinal furrow, about one-third the cell length, extending posteriorly from the subapical vestibulum; both forms with a single chloroplast, pyrenoid and nucleomorph, the cholorplast with the biliprotein pigment Cr-phycoerythrin 545. The diplomorph is usually slightly larger than the haplomorph; the two forms also differ in periplast structure and in the configuration of their flagellar apparatuses. Reproduction is generally by simple cell division; the presence of two dissimilar forms with one form having approximately twice the amount of DNA, however, suggests that sexual reproduction might be occurring. There is, as yet, no evidence of either meiosis or gametic fusion. Cyst formation is unknown and palmelloid colonies are not formed. The ultrastructure has been examined. It is unusual in that the two forms have different periplast structure and flagellar root configurations. The haplomorph has internal and superficial more or less hexagonal periplast plates; the diplomorph has an internal sheet and superficial layer of interspersed rosulate scales and coarse fibrils. Differences in the flagellar apparatuses of the two forms include the number of anteriorly directed roots and the complexity of the posteriorly directed and striated roots. Otherwise the ultrastructure of the two forms is the same. The nucleomorph is not associated with the pyrenoid. Thylakoids do not traverse the pyrenoidal matrix. Proteomonas sulcata is a coastal marine species so far only known from the southeastern coast of Australia.
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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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=46081
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 November 2024
