153,789 species and infraspecific names are in the database, 21,012 images, 59,564 bibliographic items, 413,155 distributional records.

Rhododraparnaldia R.G.Sheath, A.Whittick & K.M.Cole, 1994

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Nemaliophycidae
Order Balbianiales
Family Balbianiaceae

Holotype species: Rhododraparnaldia oregonica R.G.Sheath, A.Whittick & K.M.Cole

Original publication and holotype designation: Sheath, R.G., Whittick, A. & Cole, K.M. (1994). Rhododraparnaldia oregonica, a freshwater red algal genus and species intermediate between the Acrochaetiales and the Batrachospermales. Phycologia 33: 1-7.

Taxonomic status: currently recognized as a distinct genus.

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.

Description: Crimson-colored filaments up to 15 cm long with barrel-shaped axial cells which have a distinctly larger diam. (17.3-30.1 &m) than that of lateral branches (4.3-8.5 &m). Unique spermatangial stalks produce two types of spermatangia at their tips. Carpogonium is borne on an undifferentiated branch and has a swollen, cylindrical base and thin trichogyne. Carposporophyte spherical, compact mass of short gonimoblast filaments. Carposporangia spherical up to 8 &m in diam. Carpospores germinate into a chantransia (= pseudochantransia) phase with cells 5-7 ( 16-38 &m; this phase produces gametophyte. DAPI relative fluorescence values twice as high for gonimoblast cells, carposporangia and chantransia cells as for the gametophyte vegetative cells and gametangia. Pit plugs have two cap layers, the outer one typically domed. Nuclei in early mitotic prophase have one layer of perinuclear ER, a single-layered polar ring and chromatin associated with the nucleolus.

Information contributed by: R.G. Sheath. The most recent alteration to this page was made on 5 Oct 2010 by M.D. Guiry.

Comments: Found in two mountain streams in Oregon (U.S.A.); the type locality has moderate current velocity (35-61 cm s-1), temperatures 8-11%C, pH 8.3 and specific conductance 30 &S cm-1. This species has characteristics of both the Acrochaetiales and Batrachospermales.

Numbers of names and species: There is only one species or infraspecific name in the database at present, which has been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

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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.

Created: 28 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42908

Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 December 2018.

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