162,405 species and infraspecific names are in the database, 22,760 images, 63,996 bibliographic items, 474,969 distributional records.

Dawsoniella A.B.Joly & Yamaguishi-Tomita, 1967, nom. illeg.

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Rhodomelaceae
Tribe Polysiphonieae

Holotype species: Dawsoniella bostrychiae A.B.Joly & Yamaguishi-Tomita

Currently accepted name for the type species: Dawsoniocolax bostrychiae (A.B.Joly & Yamaguishi-Tomita) A.B.Joly & Yamaguishi-Tomita

Original publication and holotype designation: Joly, A.B. & Yamaguishi-Tomita, N. (1967). Dawsoniella bostrychiae a new parasite of mangrove algae. Sellowia 19: 63-70.

Precise date of publication31 October 1967

Taxonomic status: currently regarded as a synonym of Dawsoniocolax.

Description: Thalli very small, polysiphonous, comprised of extensive prostrate system without trichoblasts; all polysiphonous branches arise endogenously. Unicellular rhizoids, cut off from the pericentral cell, occur on ventral sides of the prostrate branches. Axial cells, at intervals of 11-13 segments, produce two indeterminate and one erect determinate branch, arising from primordia (or non-emergent trichoblasts). The indeterminate branches remain part of the prostrate system. The upright determinate branches short, up to 500 &m long, and bear the only exogenously derived branches, trichoblasts, formed one per segment, in a spiral series. Tetrasporangia produced, one per segment, in short spiral series in upright branches. Male capitula clavate, replace trichoblasts in distal part of erect branches, without a distal sterile tip. Cystocarps spheroidal, subterminal on erect branches.

Information kindly contributed by R.E. Norris but may now be outdated.

Comments: Epiphytic on Pocockiella, in the Pacific Ocean, Raroia, Tuamoto Archipelago, and at Eniwetok Atoll, Marshall Islands.

Numbers of names and species: There is only one species or infraspecific name in the database at present.

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):

Click here to also show infraspecific names in the list below.

Verification of data
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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

Verified by: 05 January 2011 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42863

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 28 July 2021.

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