Petrodictyon gemma ( ) D.G.Mann 1990
Petrodictyon gemma (Ehrenberg) D.G.Mann Close-up _Location: UK
© Robert Lavigne (MicroscopyView.com)
Petrodictyon gemma (Ehrenberg) D.G.Mann in Round, R.M.Crawford & D.G.Mann 1990: 638, 674
Published in: Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms biology and morphology of the genera. pp. [i-ix], 1-747. Cambridge: Cambridge University Press.
This is the type species (holotype) of the genus Petrodictyon.
Status of name
This name is of an entity that is currently accepted taxonomically.
Navicula gemma Ehrenberg
Lectotype locality: "An der Elbmündung bei Cuxhaven in der Nordsee" [North Sea, Germany] (Jahn & Kusber 2004: 585). Notes: Lectotype (designated by Jahn & Kusber 2004; 585): "Specimen of Taxonomic preparations No. 540032-3 in BHUPM (Fig. 41). The lectotype specimen corresponds to the valve on the left hand side of drawing sheet No. 1147 in BHUPM, except for the bacteria, which Ehrenberg might have interpreted as cilia (Fig. 40)."
Origin of species name
Noun (Latin), bud, eye (of a plant), jewel, precious stone (Brown 1946).
According to INA, this names is invalid as the basionym cited as Surirella gemma (INA); name was published as Navicula (Surirella) gemma. Jahn & Kusber (2004: 585) comment: "Navicula gemma Ehrenb. was classified originally within Surirella, an unranked infrageneric name within Navicula. Petrodictyon gemma was based on Navicula gemma sub "Surirella gemma Ehrenb. 1839. Abh. Akad. Wiss. Berlin 1839: 156". Although cited wrongly by Mann (in Round & al. 1990), the basionym is indicated by citing the protologue." - (9 Nov 2016) - Wendy Guiry
This is a marine species.
Jahn, R. & Kusber, W.H. (2004). Algae of the Ehrenberg collection - 1. Typification of 32 names of diatom taxa described by C.G. Ehrenberg. Willdenowia 34(2): 577-595, 1 table.
John, J. (2020). Diatoms from arid Australia: taxonomy and biogeography. The diatom flora of Australia Volume 3. pp. -578, 341 figs. Schmitten – Oberreifenberg: Koeltz Botanical Books.
Plinski, M. & Witkowski, A. (2020). Diatoms from the Gulf of Gdansk and surrounding waters (the southern Baltic Sea). pp. -442, incl. 31 SEM pls, 16 photo pls. Gdansk: Gdansk University Press.
Sims, P.A. (ed.) (1996). An atlas of British diatoms arranged by B. Hartley based on illustrations by H.G. Barber and J.R. Carter. pp. , 1-601, incl. 290 pls. Bristol: Biopress Ltd.
Witkowski, A., Lange-Bertalot, H. & Metzeltin, D. (2000). Diatom flora of marine coasts I. Iconographia Diatomologica 7: 1-925, 219 pls with 4504 figs.
Created: 23 April 2002 by M.D. Guiry
Verified by: 30 October 2020 by M.D. Guiry
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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 22 October 2021.