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one publication added to basket [247085]

Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea Atazadeh, I; Edlund, B; Van der Vijver, B.; Mills, K; Spaulding, A; Gell, A; Crawford, S; Barton, F; Lee, S; Smith, L; Newall, P; Potapova, M (2014). Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea. Diatom Research 29(4): 455-464. https://dx.doi.org/10.1080/0269249X.2014.927006 In: Diatom Research. Taylor & Francis: Bristol Avon. ISSN 0269-249X; e-ISSN 2159-8347

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Beschikbaar in	Auteurs
VLIZ: Non-open access 318281 [ aanvragen ]

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Trefwoorden

Bacillariophyceae [WoRMS]; Envekadea Van de Vijver, Gligora, Hinz, Kralj & Cocquyt in Gligora et al., 2009 [WoRMS]; Stauroneis pachycephala P.T.Cleve, 1881 [WoRMS] Marien/Kust; Brak water; Zoet water

Author keywords

diatoms; morphology; Stauroneis pachycephala; ecology; Envekadea;biogeography; taxonomy; lectotype

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Auteurs		Top
Atazadeh, I Edlund, B Van der Vijver, B. Mills, K	Spaulding, A Gell, A Crawford, S Barton, F	Lee, S Smith, L Newall, P Potapova, M

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Abstract

Stauroneis pachycephala was described in 1881 from the Baakens River, Port Elizabeth, South Africa. Recently, it was found during surveys of the MacKenzie River (Victoria, Australia), the Florida Everglades (USA) and coastal marshes of Louisiana (USA). The morphology, ecology and geographic distribution of this species are described in this article. This naviculoid species is characterised by lanceolate valves with a gibbous centre, a sigmoid raphe, an axial area narrowing toward the valve ends, and capitate valve apices. The central area is a distinct stauros that is slightly widened near the valve margin. The raphe is straight and filiform, and the terminal raphe fissures are strongly deflected in opposite directions. Striae are fine and radiate in the middle of the valve, becoming parallel and eventually convergent toward the valve ends. The external surface of the valves and copulae is smooth and lacks ornamentation. We also examined the type material of S. pachycephala. Our observations show this species has morphological characteristics that fit within the genus Envekadea. Therefore, the transfer of S. pachycephala to Envekadea is proposed and a lectotype is designated.

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