156,052 species and infraspecific names are in the database, 21,990 images, 60,316 bibliographic items, 443,172 distributional records.

Cyclotella dubia Fricke, nom. illeg.

Publication details
Cyclotella dubia Fricke in A.Schmidt et al. 1900: pl. 222: figs 23, 24 only, nom. illeg.

Published in: Schmidt, A. et al. (1874-1959). Atlas der Diatomaceen-kunde. . Leipzig: Aschersleben.

Type species
The type species (holotype) of the genus Cyclotella is Cyclotella tecta Håkansson & R.Ross.

Status of name
This name is currently regarded as a synonym of Cyclostephanos dubius (Hustedt) Round

Origin of species name
Adjective (Latin), doubtful.

Synonym(s)
No synonyms are currently included in AlgaeBase.

Nomenclatural notes
Illegimate: not Cyclotella dubia Hilse 1861. - (20 Apr 2010) - M.D. Guiry

As the figs of Cyclotella dubia provided by Fricke show detailed morphological features that make a certain identification of the species possible, Taf. 222 fig. 23 (in Schmidt et al., 1874-1959 is designated as type but since it is not obvious whether or not this fig. is "original material' as defined in Art.9, Note 2, it is uncertain whether this should be designated as a lectotype or neotype (H.Håkansson, 2002: 7, fig. 5, arrowed). - (24 Mar 2016) - Wendy Guiry

General environment
This is a freshwater species.

Type information
Type locality: Ukraine: Crimea (Silva 1996-to date). Type (Taf.222 fig. 23, Schmidt et al., 1874-1959): (Håkansson 2002: 7, fig. 5, arrowed). Notes: As the figs of Cyclotella dubia provided by Fricke show detailed morphological features that make a certain identification of the species possible, Taf. 222 fig. 23 (in Schmidt et al., 1874-1959 is designated as type but since it is not obvious whether or not this fig. is "original material' as defined in Art.9, Note 2, it is uncertain whether this should be designated as a lectotype or neotype (H.Håkansson, 2002: 7, fig. 5, arrowed).

Detailed distribution with sources (Click to Load)

Key references
Håkansson, H. (2002). A compilation and evaluation of species in the genera ["general"] Stephanodiscus, Cyclostephanos and Cyclotella with a new genus in the family Stephanodiscaceae. Diatom Research 17(1): 1-139, 487 figs.

Theriot, E., Håkansson, H., Kociolek, J.P., Round, F.E. & Stoermer, E.F. (1988 '1987'). Validation of the centric diatom genus name Cyclostephanos. British Phycological Journal 22(4): 345-347.

Created: 23 April 2002 by M.D. Guiry

Verified by: 24 March 2016 by Wendy Guiry

Accesses: This record has been accessed by users 475 times since it was created.

Verification of data
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Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=37742

Citing AlgaeBase
Cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 August 2019.

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