Pinnularia placentula Ehrenberg 1843
Publication Details
Pinnularia placentula Ehrenberg 1843: 421, pl. III [3]: fig. VII [7]: 22 (as 'Placentula')
Published in: Ehrenberg, C.G. (1843). Verbreitung und Einfluss des mikroskopischen Lebens in Süd- und Nord-Amerika. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1841: 291-445 + [1, Berichtigungen], + 4 pls.
Request PDFType Species
The type species (holotype) of the genus Pinnularia is Pinnularia viridis (Nitzsch) Ehrenberg.
Status of Name
This name is currently regarded as a synonym of Paraplaconeis placentula (Ehrenberg) Kulikovskiy & Lange-Bertalot.
Source of Synonymy
Kulikovskiy, M.S., Lange-Bertalot, H., Metzeltin, D. & Witkowski, A. (2012). Lake Baikal: Hotspot of endemic diatoms I. Iconographia Diatomologica 23: 1-607, incl. 156 pls.
Type Information
Type locality: "Vera Cruz" [Mexico]; (Ehrenberg 1843: 443) Lectotype [Epitype for lectotype: BM 93093 (Lilliesleaf Pond, "England")]: seaweeds and sediments from the coast of the ocean; BHUPM; fig. 19 on Ehrenberg's drawing sheet No. 2062 (Jahn 2004: 232, fig. 1) Notes: "Cox (2003) designated a neotype for Placoneis placentula (Ehrenberg) Mereschkowski because no Ehrenberg specimen could be found. The original drawing by Ehrenberg is, however, available and was therefore chosen as lectotype by Jahn (2004) with Cox’s neotype rededicated as epitype." (Jahn & Kusber 2009: 103). However, "Lilliesleaf" appears to be in Melrose, Scotland, not England. Ehrenberg (1843: 443) specified "Von den 120 vorn verzeichneten und von mir in Zeichnung vorgelegten Arten von mexikanischen Seethierchen haben hier nur 50 eine Stelle finden können." Thus the lectotype is from a marine habitat in Verz Cruz; it seems strange therefore to have an epitype for this name from a freshwater habitat in Scotland.
General Environment
This is a freshwater species.
Created: 23 April 2002 by M.D. Guiry.
Last updated: 28 December 2024
Verification of Data
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=39409
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 28 December 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 14 March 2025
