149,969 species and infraspecific names are in the database, 20,386 images, 57,652 bibliographic items, 380,224 distributional records.

Pleurosigma W.Smith, 1852, nom. et typ. cons.

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

Holotype species: Pleurosigma angulatum (J.T.Quekett) W.Smith

Original publication and holotype designation: Smith, W. (1852). Notes on the Diatomaceae with descriptions of British species included in the genus Pleurosigma. Annals and Magazine of Natural History, series 2 9: 1-12, 2pl.
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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.

Comments: Round, Crawford & Mann (1990: 128) record this family as being a member of the Suborder Naviculineae. Scott & Thomas (2005: 158) record this genus as being a member of the Family Naviculaceae.

Numbers of names and species: There are 167 species names in the database at present, of which 98 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):

Pleurosigma acuminatum (Kützing) Grunow S 
Pleurosigma acuminatum (Kützing) W.Smith S 
Pleurosigma acus A.Mann C 
Pleurosigma acutum Norman ex Ralfs C 
Pleurosigma aestuarii (Brébisson ex Kützing) W.Smith C 
Pleurosigma amarum S.R.Stidolph C 
Pleurosigma amarum S.R.Stidolph C 
Pleurosigma ambrosianum Sterrenburg, M.A.Tiffany & C.B.Lange C 
Pleurosigma americanum H.Peragallo C 
Pleurosigma angulatum (J.T.Quekett) W.Smith C - type
Pleurosigma angusti-convexum Hagelstein C 
Pleurosigma antarcticum Grunow C 
Pleurosigma arcticum (Cleve) A.Mann U 
Pleurosigma arcuatum Donkin S 
Pleurosigma asiaticum (Tempère & Brun) H.Peragallo S 
Pleurosigma atlanticum Frenguelli P 
Pleurosigma attenuatum (Kützing) W.Smith S 
Pleurosigma australe Grunow C 
Pleurosigma balticum (Ehrenberg) W.Smith S 
Pleurosigma barbadense Grunow C 
Pleurosigma boyeri Keeley S 
Pleurosigma brebissonii Grunow S 
Pleurosigma brunii Cleve ex H.Peragallo C 
Pleurosigma candidum Schumann U 
Pleurosigma capense Petit C 
Pleurosigma capense Karsten U 
Pleurosigma carinatum Donkin S 
Pleurosigma chandolensis H.P.Gandhi C 
Pleurosigma chilense Hustedt & Krasske C 
Pleurosigma clevei Grunow C 
Pleurosigma compactum Greville S 
Pleurosigma crassum Meister C 
Pleurosigma crookii Inglis C 
Pleurosigma curiosum van den Heuvel C 
Pleurosigma curvulum (Ehrenberg) Ralfs P 
Pleurosigma cuspidatum Cleve C 
Pleurosigma cuspidatum (Cleve) H.Peragallo C 
Pleurosigma decorum W.Smith C 
Pleurosigma delicatulum W.Smith C 
Pleurosigma densestriatum H.P.Gandhi C 
Pleurosigma depauperata Manguin in Bourrelly & Manguin P 
Pleurosigma diminutum Grunow C 
Pleurosigma directum Grunow C 
Pleurosigma distinguendum Hustedt C 
Pleurosigma distortum W.Smith S 
Pleurosigma diversestriatum F.Meister C 
Pleurosigma elongatum W.Smith C 
Pleurosigma exemptum A.Mann C 
Pleurosigma eximium (Thwaites) Grunow S 
Pleurosigma exsul Cleve C 
Pleurosigma falcatum Donkin S 
Pleurosigma fallax Grunow S 
Pleurosigma falx A.Mann C 
Pleurosigma fasciola (Ehrenberg) W.Smith S 
Pleurosigma finmarchicum Grunow C 
Pleurosigma finmarchicum Cleve in Cleve & Möller P 
Pleurosigma fluviicygnorum J.John C 
Pleurosigma formosum W.Smith C 
Pleurosigma frenguellianum Sunesen, Sterrenburg & Sar C 
Pleurosigma galapagense Cleve C 
Pleurosigma gracile Hustedt C 
Pleurosigma gracilentum Rabenhorst S 
Pleurosigma gracilitatis Sterrenburg, Meave & Tiffany C 
Pleurosigma gracillimum Meister C 
Pleurosigma grovesii Cleve ex H.Peragallo S 
Pleurosigma gruendleri Grunow C 
Pleurosigma guarreranum E.A.Sar, F.A.S.Sterrenburg & I.Sunesen C 
Pleurosigma hamuliferum Brun C 
Pleurosigma hinzianum Sterrenburg, Sunesen & Sar C 
Pleurosigma hippocampus W.Smith S 
Pleurosigma ibericum Peragallo C 
Pleurosigma indicum Simonsen C 
Pleurosigma inflatum Shadbolt C 
Pleurosigma inscriptura M.A.Harper C 
Pleurosigma intermedium W.Smith C 
Pleurosigma intermedium W.Smith C 
Pleurosigma italicum H.Peragallo C 
Pleurosigma kerguelense Grunow C 
Pleurosigma kjellmanii Cleve C 
Pleurosigma kuetzingii Grunow S 
Pleurosigma lacustre W.Smith S 
Pleurosigma lanceolatum Donkin C 
Pleurosigma lange-bertalotii B.Karthick & Kociolek C 
Pleurosigma latiusculum H.Peragallo P 
Pleurosigma latum Cleve C 
Pleurosigma lineare Grunow C 
Pleurosigma longinum W.Smith ex Brightwell C 
Pleurosigma longum Cleve C 
Pleurosigma lorenzii Grunow U 
Pleurosigma lysekilii G.Reid C 
Pleurosigma macilentum H.Peragallo C 
Pleurosigma macrum W.Smith S 
Pleurosigma maeoticum Pantocsek C 
Pleurosigma majus T.G.Chin & S.Liu U 
Pleurosigma malmoensis G.Reid C 
Pleurosigma mamoranqii G.Reid C 
Pleurosigma marinum Donkin C 
Pleurosigma maroccanum (Cleve ex H.Peragallo) Cleve S 
Pleurosigma minutum Donkin S 
Pleurosigma naja Meister S 
Pleurosigma naviculaceum Brébisson S 
Pleurosigma negoroi T.Gotoh C 
Pleurosigma nicobaricum Grunow C 
Pleurosigma nodiferum Grunow S 
Pleurosigma normanii Ralfs C 
Pleurosigma obesum A.Mann S 
Pleurosigma obliquum Grunow S 
Pleurosigma obscurum W.Smith S 
Pleurosigma obtusatum W.S.Sullivant & Wormley S 
Pleurosigma obtusum A.Mann C 
Pleurosigma paradoxum H.Peragallo C 
Pleurosigma parkeri M.B.Harrison S 
Pleurosigma patagonicum (M.E.Ferrario & E.A.Sar) F.Sterrenburg & E.A.Sar C 
Pleurosigma peisone Grunow S 
Pleurosigma pelagicum Cleve C 
Pleurosigma permagnum Meister C 
Pleurosigma perthense J.John C 
Pleurosigma planctonicum H.-J.Schrader C 
Pleurosigma planctonicum A.Cleve C 
Pleurosigma portoricense Hagelstein C 
Pleurosigma praelongum Cleve C 
Pleurosigma prolongatum W.Smith S 
Pleurosigma pulchrum Grunow C 
Pleurosigma pusillum Grunow S 
Pleurosigma quadratum W.Smith S 
Pleurosigma quininpiaceii M.Peragallo S 
Pleurosigma rectum Donkin S 
Pleurosigma reticulatum (Norma) Hustedt S 
Pleurosigma rhombeum (Grunow) H.Peragallo C 
Pleurosigma rhomboides Cleve C 
Pleurosigma rigidum W.Smith C 
Pleurosigma rostratum Hustedt C 
Pleurosigma sabangi Meister P 
Pleurosigma salinarum (Grunow) Grunow C 
Pleurosigma scalpellum Pritchard P 
Pleurosigma scalproides Rabenhorst S 
Pleurosigma scalprum (Gaillon) Ralfs S 
Pleurosigma sciotoense W.S.Sullivant S 
Pleurosigma simile Grunow S 
Pleurosigma simonsenii Hasle C 
Pleurosigma sinensis (Ehrenberg) Ralfs S 
Pleurosigma speciosum W.Smith C 
Pleurosigma spenceri (Bailey ex Quekett) W.Smith S 
Pleurosigma spenceri Grunow C 
Pleurosigma spinulosum Pantocsek & Greguss P 
Pleurosigma staurophorum Grunow S 
Pleurosigma sterrenburgii Stidolph C 
Pleurosigma stidolphii F.A.S.Sterrenburg C 
Pleurosigma strigilis W.Smith S 
Pleurosigma strigosum W.Smith C 
Pleurosigma stuxbergii Cleve & Grunow C 
Pleurosigma subhyalinum Hustedt & Aleem C 
Pleurosigma subrectum Cleve C 
Pleurosigma subrigidum Grunow C 
Pleurosigma subsalinum H.Peragallo U 
Pleurosigma subsalsum Wislouch & Kolbe C 
Pleurosigma subtilissimum T.Marsson C 
Pleurosigma tahitianum Ricard C 
Pleurosigma tahitiense Witt S 
Pleurosigma temperei (Cleve) M.Peragallo S 
Pleurosigma tenuirostris Grunow S 
Pleurosigma terryanum H.Peragallo S 
Pleurosigma transversale W.Smith S 
Pleurosigma validum Shadbolt S 
Pleurosigma vitreum Cleve S 
Pleurosigma wansbeckii Donkin S 
Pleurosigma wormleyi W.S.Sullivant S 

References
Hustedt, F. (1930). Bacillariophyta (Diatomeae) Zweite Auflage. In: Die Süsswasser-Flora Mitteleuropas. Heft 10. (Pascher, A. Eds), pp. [i]-vii, [1]-466. Jena: Verlag von Gustav Fischer.

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.

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Created: 11 April 2002 by M.D. Guiry

Verified by: 16 February 2016 by M.D. Guiry

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