Pinnularia acrosphaeria W.Smith 1853
Publication Details
Pinnularia acrosphaeria W.Smith 1853: 58, pl. XIX [19]: fig. 183
Published in: Smith, W. (1853). A synopsis of the British Diatomaceae; with remarks on their structure, function and distribution; and instructions for collecting and preserving specimens. The plates by Tuffen West. In two volumes. Vol. I. pp. [i]-xxxiii, 1-89, pls I-XXXI. London: John van Voorst, Paternoster Row.
Request PDFType Species
The type species (holotype) of the genus Pinnularia is Pinnularia viridis (Nitzsch) Ehrenberg.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Syntype localities: "Fresh water. Near Lewes, Sept. 1850, W. Sm. Premnay Peat. Dolgelly Earth." [England and Scotland]; (Smith 1853: 58)
General Environment
This is a freshwater species.
Created: 11 April 2002 by M.D. Guiry.
Last updated: 20 May 2025
Verification of Data
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Nomenclatural note
Metzeltin & Lange-Bertalot (2007: 191) "The specimens from the Pantanal wetlands in Paraguay conform to the type originating from England as to outlines and stria density (11/10 pm), however differ by (significantly?) lower valve dimensions (55-63 µm long, 11-12 µm broad) and the almost lacking or at most indistinct 'granulation' in the axial area. Conspecificity perhaps as intraspecific offspring, cannot be excluded. On the other hand, conspecificity with Pinnularia acrosphaeria var. parva Krammer appears unlikely mainly because of significantly coarser striae, 7.5-8.5/10 µm. The latter taxon originates from Java, fossil (edible earth). See also another population of P. acrosphaeria from Rio Guama near Belem, Brazil (Metzeltin & Lange-Bertalot 1998, figs 168: 1-6) more similar to the type from England than to the Pantanal forms." - (28 August 2023) - M.D. Guiry
Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=31941
Citing AlgaeBase
Cite this record as:
G.M. Guiry in Guiry, M.D. & Guiry, G.M. 20 May 2025. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 June 2025
