163,410 species and infraspecific names are in the database, 22,770 images, 62,959 bibliographic items, 480,353 distributional records.

Placoneis constans (Hustedt) E.J.Cox 2003

Publication details
Placoneis constans (Hustedt) E.J.Cox 2003: 73

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 of an entity that is currently accepted taxonomically.

Navicula constans Hustedt

Origin of species name
Participle B (Latin), constant, uniform, consistent, consisting of (Stearn 1973).

Homotypic Synonym(s)
Navicula constans Hustedt 1944

General environment
This is a freshwater species.

Detailed distribution with sources
(as Navicula constans Hustedt)
Europe: Britain (Whitton & al. 2003), Czech Republic (Lysáková, Kitner & Poulícková 2007), Germany (Ludwig & Schnittler 1996, Rumrich, Lange-Bertalot & Rumrich 2000, Mauch & Schmedtje 2003, Täuscher 2014, Täuscher 2016), Netherlands (Veen & al. 2015), North Macedonia (Levkov & Williams 2012), Romania (Caraus 2017).

North America: Alaska (Foged 1981), NW USA (Bahls 2009), United States of America (Kociolek 2005).

South-east Asia: Thailand (Foged 1972).

Australia and New Zealand: Queensland (Bostock & Holland 2010).

(as Placoneis constans (Hustedt) E.J.Cox)
Europe: France (Anon. 2017), Germany (Hofmann & al. 2018, Täuscher 2020), Netherlands (Veen & al. 2015), Poland (Bąk et al. 2012), Romania (Caraus 2017).

South America: Brazil (Dunck & al. 2018), Colombia (Montoya-Moreno et al. 2013).

Middle East: Iraq (Maulood & al. 2013).

South-west Asia: India (Gupta & Das 2020).

Asia: Russia (Kulikovskiy & al. 2016), Russia (Far East) (Medvedeva & Nikulina 2014).

Key references
Bąk, M., Witkowski, A., Zelazna-Wieczorek, J., Wojtal, A.Z., Szczepocka , E., Szulc, A. & Szulc, B. (2012). Klucz do oznaczania okrzemek w fitobentosie na potrzeby oceny stanu ekologicznego wód powierzchniowych w Polsce Biblioteka Monitoringu Srodowiska. pp. 1-452. Warszawa [Warsaw]: Glowny Inspektorat Ochrony Srodowiska.

Kulikovskiy, M., Glushchenko, A.M., Kuznetsova, I.V. & Genkal, S.I. (2016). [Identification book of diatoms from Russia]. pp. [1]-804, 165 pls. Yaroslavl: Filigran. [in Russian]

Created: 13 March 2006 by M.D. Guiry

Verified by: 02 July 2018 by M.D. Guiry

Accesses: This record has been accessed by users 318 times since it was created.

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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 26 September 2021.

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