163,402 species and infraspecific names are in the database, 22,770 images, 62,958 bibliographic items, 480,353 distributional records.

Placoneis exigua (W.Gregory) Mereschkovsky 1903

Publication details
Placoneis exigua (W.Gregory) Mereschkovsky 1903: 13, pl. 1: fig. 17

Published in: Mereschkowsky, C. (1903). Über Placoneis, ein neues Diatomeen-Genus. Beihefte zum Botanischen Centralblatt 15(1): 1-30, pl. 1.

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.

Pinnularia exigua W.Gregory

Origin of species name
Adjective A (Latin), small, short, poor, scanty (Brown 1946).

Homotypic Synonym(s)
Pinnularia exigua W.Gregory 1854
Navicula gastrum var. exigua (W.Gregory) Grunow 1880
Navicula exigua (W.Gregory) Grunow 1880
Placoneis gastrum var. exigua (Gregory) Mereschkowsky 1903
Placoneis elginensis f. exigua (Gregory) Bukhtiyarova 1995

General environment
This is a freshwater species.

Detailed distribution with sources
(as Pinnularia exigua W.Gregory)
Europe: Slovakia (Hindák & Hindáková 2016).

(as Navicula gastrum var. exigua (W.Gregory) Grunow)
Europe: Britain (Hendey 1954, Hendey 1974), Slovakia (Hindák & Hindáková 2016).

North America: United States of America (Patrick & Reimer 1966, Kociolek 2005).

(as Navicula exigua (W.Gregory) Grunow)
Europe: Germany (Rumrich, Lange-Bertalot & Rumrich 2000), Netherlands (Veen & al. 2015), Russia (Europe) (Komulaynen 2018), Slovakia (Hindák & Hindáková 2016).

North America: United States of America (Patrick & Reimer 1966).

Middle East: Israel (Barinova, Tavassi & Glassman 2009, Barinova, Yeuda & Nevo 2010).

Asia: Hong Kong (Lam & Lei 1999), Korea (Lee, Choi & Lee 1995).

(as Placoneis exigua (W.Gregory) Mereschkovsky)
Atlantic Islands: Azores (Gonçalves, Marques & Fonseca 2010).

Europe: Baltic Sea (Hällfors 2004), Britain (Whitton & al. 2003), Netherlands (Veen & al. 2015), Poland (Plinski & Witkowski 2020), Scandinavia (Karlason & al. 2018).

North America: Laurentian Great Lakes (Stoermer, Kreis & Andresen 1999), NW USA (Bahls 2009), United States of America (Kociolek 2005, Eberle 2008).

South America: Brazil (Eskinazi-Leça & al. 2010).

Africa: Democratic Republic of Congo (Stoyneva-Gärtner & Descy 2020).

Middle East: Turkey (Aysel 2005, Taskin (ed.) & al. 2019).

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

Asia: China (Li & Qi 2018), Mongolia (Edlund & al. 2001, Dorofeyuk & Kulikovskiy 2012), Russia (Far East) (Medvedeva & Nikulina 2014), Tajikistan (Niyatbekov & Barinova 2018).

Australia and New Zealand: Australia (John 2018), New Zealand (Harper & al. 2012), Queensland (Bostock & Holland 2010).

Pacific Islands/Pacific Ocean: Hawaiian Islands (Sherwood 2004).

(as Placoneis elginensis f. exigua (Gregory) Bukhtiyarova)
Europe: Georgia (Barinova & al. 2011), Ireland (Wolnik & Carter 2014), Ukraine (Bukhtiyarova 1999).

Key references
Eberle, M.E. (2008). Recent diatoms reported from the central United States: register of taxa and synonyms. Hays, Kansas: Department of Biological Sciences, Fort Hays State University. Latest electronic version: 5 December 2008.

John, J. (2020). Diatoms from arid Australia: taxonomy and biogeography. The diatom flora of Australia Volume 3. pp. [1]-578, 341 figs. Schmitten – Oberreifenberg: Koeltz Botanical Books.

Li Jiaying & Qi Yuzao [Li, J.Y. & Qi, Y.Z.] (2018). Flora algarum sinicarum aquae dulcis Tomus XXIII Bacillariophyta Naviculaceae (III). pp. [1-8], i-xxiii, 1-214, pls I-XLVIII. Beijing: Science Press.

Plinski, M. & Witkowski, A. (2020). Diatoms from the Gulf of Gdansk and surrounding waters (the southern Baltic Sea). pp. [1]-442, incl. 31 SEM pls, 16 photo pls. Gdansk: Gdansk University Press.

Created: 11 April 2002 by M.D. Guiry

Verified by: 29 October 2020 by M.D. Guiry

Accesses: This record has been accessed by users 690 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 25 September 2021.

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