Gyrosigma peisonis (Grunow) Hustedt 1930
Publication Details
Gyrosigma peisonis (Grunow) Hustedt 1930: 226 (as 'Pesionis')
Published in: 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.
Request PDFType Species
The type species (holotype) of the genus Gyrosigma is Gyrosigma hippocampus Hassall.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Basionym
Pleurosigma peisonis Grunow
Type Information
Type locality: Austria: Neuseidler See; Notes: Lectotype slide #175(177.181.187)284 Neusiedler See, Grunow collection Vienna (designated in Sterrenburg 1997). Epitypes Sterrenburg #389, BM 81867, also in BRM and ANSP.
Origin of Species Name
Noun (Latin), of Lake Peiso [Peiso Lacus; Neusiedler See; Lake Neusiedl - Austria, Hungary]; "Peiso" is treated as a third-decelension noun, the genitive case of would be "peisonis".
General Environment
This is a brackish species.
Description
Valve slightly sigmoid, linear-lanceolate with fairly obtuse ends, 65-125 µm long, 8-13 µm wide. Raphe sternum with slight to moderate double curvature, raphe angle +4 to 0°, clearly eccentric near the ends. Central area fairly large, oval, symmetric. Central raphe fissures oppositely deflected dimorphic crooks. Terminal areas small funnels in semilateral position. A segment of apical microforamina runs around the apex (SEM). Striae transverse 21-23 in 10 µm, longitudinal clearly finer, 25-28 in 10 µm.
Habitat
Fresh to clearly brackish waters including estuaries and saline inland lakes. Personally observed (Sterrenburg) in Europe and the USA but probably much more widespread.
Created: 11 April 2002 by M.D. Guiry.
Last updated: 18 May 2022
Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=33637
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 18 May 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024
