Gyrosigma obscurum (W.Smith) J.W.Griffith & Henfrey

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Bacillariophyceae
Subclass Bacillariophycidae
Superorder Bacillarianae
Order Naviculales
Family Pleurosigmataceae
Genus Gyrosigma

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Publication details
Gyrosigma obscurum (W.Smith) J.W.Griffith & Henfrey 1856: 302; pl. 11, fig. 27

Original publication: Griffith, J.W. & Henfrey, A. (1856). The micrographic dictionary: a guide to the examination and investigation of the structure and nature of microscopic objects; illustrated by forty-one plates and eight hundred and sixteen woodcuts. pp. [i]-v, [1]-696, 41 pls. London: John van Voorst.

Type species
The type species (holotype) of the genus Gyrosigma is Gyrosigma hippocampus (Ehrenberg) Hassall.

Status of name
This name is of an entity that is currently accepted taxonomically.

Basionym
Pleurosigma obscurum W.Smith

Origin of species name
Adjective (Latin), dark, shady, indisctinct (Stearn 1973).

Homotypic Synonym(s)
Pleurosigma obscurum W.Smith 1852
Scalptrum obscurum (W.Smith) Kuntze 1891

General environment
This is a Brackish species.

Detailed distribution with sources
(as Pleurosigma obscurum W.Smith)
Antarctic and the subantarctic islands: King George Island (Al-Handal & Wulff 2008).

(as Gyrosigma obscurum (W.Smith) J.W.Griffith & Henfrey)
Europe: Britain (Whitton et al. 2003).

North America: United States of America (Patrick & Reimer 1966).

Source of synonymy
Patrick, R. & Reimer, C.W. (1966). The diatoms of the United States exclusive of Alaska and Hawaii. Volume 1: Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. pp. 688. Philadelphia: Academy of Natural Sciences.

Key references
Eberle, M.E.. (2008). Recent Diatoms reported from the Central United States: Register of Taxa and Synonyms. Hays, Kansas, USA: Departemen of Biological Sciences, Fort Hays State University. Latest electronic version: 5 December 2008.

SAG Cultures
SAG Cultures may be viewed at http://sagdb.uni-goettingen.de/showstrains.php?genus=Gyrosigma&species=obscurum

SCCAP Cultures
Cultures from the Scandinavian Culture Collection of Algae at the University of Copenhagen (SCCAP) and Protozoa may be viewed at http://www.sccap.dk/search/algaebase.asp?Genus=Gyrosigma&Species=obscurum

NCBI Nucleotide Sequences

Created: 11 April 2002 by M.D. Guiry

Verified by: 10 September 2011 by Salvador Valenzuela Miranda

Accesses: This record has been accessed by users 385 times since it was created.

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Sterrenburg, F.A.S. (1993). Studies on the genera Gyrosigma and Pleurosigma (Bacillariophyceae). The identity of Pleurosigma obscurum W. Smith. Diatom Research 8(2): 447-456.

Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=32041

Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 May 2013.

Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:101675