163,469 species and infraspecific names are in the database, 22,770 images, 62,968 bibliographic items, 480,353 distributional records.

Achnanthidium Kützing, 1844

Empire Eukaryota
Kingdom Chromista
Phylum Bacillariophyta
Subphylum Bacillariophytina
Class Bacillariophyceae
Subclass Bacillariophycidae
Order Cocconeidales
Family Achnanthidiaceae

Lectotype species: Achnanthidium microcephalum Kützing

Currently accepted name for the type species: Achnanthidium minutissimum (Kützing) Czarnecki

Original publication:Kützing, F.T. (1844). Die Kieselschaligen Bacillarien oder Diatomeen. pp. [i-vii], [1]-152, pls 1-30. Nordhausen: zu finden bei W. Köhne.
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Type designated in Rabenhorst, L. (1853). Die Süsswasser-Diatomaceen (Bacillarien.): für Freunde der Mikroskopie. pp. [1]-xii, [1]-72, 10 pls. Leipzig: Eduard Kummer.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Fourtanier, E. & Kociolek, J.P. (1999). Catalogue of the diatom genera. Diatom Research 14(1): 1-190.

Nomenclatural notes
Fourtanier, E. & Kociolek (1999: 22) write "Kiitzing does not specify that this is a new genus. Two species are described in the original publication (A. microcephalum and A. delicatulum), and no generitype is designated. In Cleve 1895 (ref. 000949) p. 191, it is introduced as %u201CAchnanthidium (Kiitz. 1844) Heib. 1863%u201D, there is, however, nothing in Heiberg 1863 (ref. 000471, p. 118) that justifies such a citation. According to Ross in Farr et al. 1979, Achnanthidium microcephalum was designated as the type by Rabenhorst 1853, p. 46 (ref. 000772); Rabenhorst transferred A. delicatulum into genus Falcatella, but retained A. microcephalum in Achnanthidium (p. 25), his action by itself does not constitute lectotypification which is effected by Ross in Farr et al. 1979, p. 12." - (14 Aug 2017) - M.D. Guiry

Taxonomic notes
Achnanthidiales (Kociolek, 2018). - (12 Mar 2020) - Wendy Guiry

Numbers of names and species: There are 195 species names in the database at present, as well as 36 infraspecific names. Of the species names, 125 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):

Click here to also show infraspecific names in the list below.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Created: 11 April 2002 by M.D. Guiry

Verified by: 14 August 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43670

Citing AlgaeBase
Please cite this record as:
M.D. 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 28 September 2021.

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