163,335 species and infraspecific names are in the database, 22,769 images, 62,932 bibliographic items, 478,463 distributional records.

Placoneis navicularis (Ehrenberg) E.J.Cox 2003

Publication details
Placoneis navicularis (Ehrenberg) E.J.Cox 2003: 71

Published in: Cox, E.J. (2003). Placoneis Mereschkowsky (Bacillariophyta) revisited: resolution of several typification and nomenclatural problems, including the generitype. Botanical Journal of the Linnean Society 141: 53-83.

Type species
The type species (lectotype) of the genus Placoneis is Placoneis gastrum (Ehrenberg) Mereschkowsky.

Status of name
This name is currently regarded as a synonym of Rexlowea navicularis (Ehrenberg) Kociolek & E.W.Thomas

Amphiprora navicularis Ehrenberg

Type information
Type locality: U.S.A.: Massachusetts: Pelham (Index Nominum Algarum). Lectotype (fide E.J.Cox, 2003: 71): BHUPM Eco-006 (Index Nominum Algarum

Origin of species name
Adjective (Latin), of or relating to the shipping business (Lewis & Short 1890).

No synonyms are currently included in AlgaeBase.

Nomenclatural notes
Navicula semen Ehrenberg sensu Donkin; Cox (2003) discusses the need to revise the nomenclature of this taxon, given uncertainties of the original Ehrenberg descriptions and material. - (19 May 2021) - M.D. Guiry

General environment
This is a freshwater species.

Detailed distribution with sources
(as Placoneis navicularis (Ehrenberg) E.J.Cox)
Europe: Germany (Hofmann & al. 2018), Netherlands (Veen & al. 2015).

North America: Colorado (Kociolek & Thomas 2010).

Source of current name
Kociolek, J.P., Kulikovskiy, M.[S.], Genkal, S. & Kuznetsova, I. (2018 '2017'). Morphological investigation and transfer of Naviculadicta parasemen Lange-Bertalot to the genus Rexlowea Kociolek & Thomas. Diatom Research 32(4): 477-481, 16 figs..

Key references
Patrick, R.[M.] & Reimer, C.W. (1966). The diatoms of the United States exclusive of Alaska and Hawaii. Volume 1: Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13: 1-688.

Tanaka, H., Suzuki, H. & Nagumo, T. (2020). Taxonomic study of fossil pennate diatoms in Futoro Formation, Setana, Hokkaido, Japan with the description of Cocconeis setanensis sp. nov. and reclassification of three taxa. Diatom 36: 47-67.

Created: 13 March 2006 by M.D. Guiry

Verified by: 19 May 2021 by M.D. Guiry

Accesses: This record has been accessed by users 203 times since it was created.

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Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=106876

Citing AlgaeBase
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 20 September 2021.

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