Dixoniella J.L.Scott, S.T.Broadwater, B.D.Saunders, J.P.Thomas & P.W.Gabrielson, 1992

Holotype species: Dixoniella grisea (Geitler) J.L.Scott, S.T.Broadwater, B.D.Saunders, J.P.Thomas & P.W.Gabrielson

Original publication and holotype designation: Scott, J.L., Broadwater, S.T., Saunders, B.D. & Thomas, J.P. (1992). Ultrastructure of vegetative organization and cell division in the unicellular red alga Dixoniella grisea gen. nov. (Rhodophyta) and a consideration of the genus Rhodella. Journal of Phycology 28: 649-660.

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Precise date of publication: 21 October 1992

Description: Spherical unicell surrounded by a mucilaginous sheath. Cell diameter 8.5-17.0 um (excluding sheath) up to 30 um with sheath. Single chloroplast with lobes radiating from a slightly eccentric pyrenoid. Olive green to grayish green in colour. A peripheral limiting thylakoid is always present adjacent to the chloroplast envelope. Pyrenoid is traversed by thylakoids lacking phycobilisomes. Dictyosomes always perinuclear. Peripheral endoplasmic reticulum tubule system present along entire cell circumference just inside plasmalemma. Usually one nucleus/cell. Pair of nucleus-associated organelles (NAO) with ring morphology present. Metaphase nucleus with a single large gap in the nuclear envelope at each pole. Asexual reproduction presumably by binary fission. Sexual reproduction unknown.

Information contributed by: M. Hawkes. The most recent alteration to this page was made on 2021-10-23 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: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42895

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 23 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 November 2024