Gyrosigma limosum Sterrenburg & Underwood 1997
Gyrosigma limosum Sterrenburg & Underwood SEM centre int
© F.A.S Sterrenburg
Gyrosigma limosum Sterrenburg & Underwood 1997: 167, figs 1-7
Published in: Sterrenburg, F.A.S. & Underwood, G.J.C. (1997). Studies on the genera Gyrosigma and Pleurosigma (Bacillariophyceae). The marine "Gyrosigma spenceri" records: Gyrosigma limosum Sterrenburg et Underwood nov. sp. Proceedings Academy of Natural Sciences of Philadelphia 148: 165-169.
Status of name
This name is of an entity that is currently accepted taxonomically.
Type locality: UK: England: Essex: Hythe Marshes, Colne Estuary (Index Nominum Algarum). Type: BM 81868 (Index Nominum Algarum
No synonyms are currently included in AlgaeBase.
This very common and strictly littoral marine species had been widely misidentified in the literature as "Gy spenceri" (= the strictly non-marine species Gy. acuminatum). - (14 Sep 2011) - M.D. Guiry
This is a marine species.
Valve slightly sigmoid, linear-lanceolate, with subacute ends, 55-85 µm long, 8.5-12.5 µm wide. Raphe sternum with single curvature, raphe angle +4 to +8°, practically median throughout. Central raphe fissures oppositely deflected dimorphic crooks, difficult to see in LM. Terminal areas very small triangles in semilateral position. A small apical microforamina segment is present at the very tip of the vlave (SEM). Striae transverse 20 24 in 10 µm, longitudinal much finer, 26 29 in 10 µm. One paraxial row of internal areolar foramina displays small hoods; at the valvar margin the striae become condensed (SEM).
Common littoral marine species flourishing in very large numbers on salt marshes and mudflats on the coasts of W. Europe and the USA. Probably much more widely distributed.
Gy. spenceri sensu Hustedt (1930), van der Werff & Huls (1957 1974) and other authors.
Thaler, M. & Kaczmarska, I. (2009). Gyrosigma orbitum sp. nov. (Bacillariophyta) from a salt marsh in the Bay of Fundy, eastern Canada. Botanica Marina 52: 60-68.
Created: 25 March 2010 by G.M. Guiry
Verified by: 22 January 2021 by G.M. Guiry
Accesses: This record has been accessed by users 1584 times since it was created.
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(Please note: only references with the binomials in the title are included. The information is from the Literature database.)
Sterrenburg, F.A.S. & Underwood, G.J.C. (1997). Studies on the genera Gyrosigma and Pleurosigma (Bacillariophyceae). The marine "Gyrosigma spenceri" records: Gyrosigma limosum Sterrenburg et Underwood nov. sp. Proceedings Academy of Natural Sciences of Philadelphia 148: 165-169.
Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=136645
Cite this record as:
G.M. 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 22 October 2021.