153,615 species and infraspecific names are in the database, 20,981 images, 59,407 bibliographic items, 412,628 distributional records.

Gyrosigma Hassall, 1845, nom. cons.

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Bacillariophyta
Subphylum Bacillariophytina
Class Bacillariophyceae
Subclass Bacillariophycidae
Order Naviculales
Suborder Naviculineae
Family Naviculaceae

Holotype species: Gyrosigma hippocampus Hassall

Currently accepted name for the type species: Gyrosigma acuminatum (Kützing) Rabenhorst

Original publication and holotype designation: Hassall, A.H. (1845). A history of the British freshwater algae, including descriptions of the Desmideae and Diatomaceae. With upwards of one hundred plates, illustrating the various species. Vol. I. pp. [i]-viii, [i]-462, [ i , err.]. London, Edinburgh, Paris & Leipzig: S. Highley, H. Baillière; Sunderland & Knox; J.B. Baillière; T.O. Weigel.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Cox, E.J. (2015). Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae (Diatoms). In: Sylabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. 13th Ed. Photoautotrophic eukaryotic algae Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Heterokontophyta/Ochrophyta, Chlorarachniophyta/Cercozoa, Euglenophyta/Euglenozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 64-103. Stuttgart: Borntraeger Science Publishers.

Taxonomic notes
Pleurosigmataceae (Han et al., 2018). - (16 Apr 2018) - Wendy Guiry

Comments: Round, Crawford & Mann (1990: 128) record this family as being a member of the Suborder Naviculineae. Scott & Thomas (2005: 148) record this genus as a member of the Family Naviculaceae.

Numbers of names and species: There are 163 species names in the database at present, as well as 67 infraspecific names. Of the species names, 86 have 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):

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

References
Kociolek, J.P. & Spaulding, S.A. (2003). Symmetrical Naviculoid Diatoms. In: Freshwater Algae of North America, Ecology and Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 637-654. San Diego: Academic Press.

Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms Biology and morphology of the genera. pp. [i-ix], 1-747. Cambridge: Cambridge University Press.

Scott, F.J. & Thomas, D.P. (2005). Diatoms. In: Antarctic marine protists. (Scott, F.J. & Marchant, H.J. Eds), pp. 13-201. Canberra & Hobart: Australian Biological Resources Study; Australian Antarctic Division.

Han, J., Zhang, L., Wang, P., Yang, G., Wang, S., Li, Y. & Pan, K. (2018). Heterogeneity of intron presence/absence in Olifantiella sp. (Bacillariophyta) contributes to the understanding of intron loss. Journal of Phycology 54(1): 105-113.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Created: 11 April 2002 by M.D. Guiry

Verified by: 30 September 2016 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43743

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 November 2018.

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