Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea
Stauroneis pachycephala was described in 1881 fromthe 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 distribut...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/96747 2023-12-17T10:33:16+01:00 Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea Atazadeh, I. Edlund, M. Van der Vijver, B. Mills, K. Spaulding, S. Gell, P. Crawford, S. Barton, A. Lee, S. Smith, K. Newall, P. Potapova, M. 2014 http://hdl.handle.net/2440/96747 https://doi.org/10.1080/0269249X.2014.927006 en eng Taylor & Francis Diatom Research, 2014; 29(4):455-464 0269-249X 2159-8347 http://hdl.handle.net/2440/96747 doi:10.1080/0269249X.2014.927006 © 2014 The International Society for Diatom Research http://dx.doi.org/10.1080/0269249x.2014.927006 diatoms morphology Stauroneis pachycephala ecology Envekadea biogeography taxonomy lectotype Journal article 2014 ftunivadelaidedl https://doi.org/10.1080/0269249X.2014.92700610.1080/0269249x.2014.927006 2023-11-20T23:32:33Z Stauroneis pachycephala was described in 1881 fromthe 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. Islam Atazadeha, Mark B. Edlundb, Bart Van der Vijvercd, Keely Millsaek, Sarah A. Spauldingf, Peter A. Gella, Simon Crawfordg, Andrew F. Bartona, Sylvia S. Leeh, Kathryn E.L. Smithi, Peter Newalla, Marina Potapovaj Article in Journal/Newspaper Mackenzie river The University of Adelaide: Digital Library Mackenzie River Diatom Research 29 4 455 464 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
diatoms morphology Stauroneis pachycephala ecology Envekadea biogeography taxonomy lectotype |
spellingShingle |
diatoms morphology Stauroneis pachycephala ecology Envekadea biogeography taxonomy lectotype Atazadeh, I. Edlund, M. Van der Vijver, B. Mills, K. Spaulding, S. Gell, P. Crawford, S. Barton, A. Lee, S. Smith, K. Newall, P. Potapova, M. Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
topic_facet |
diatoms morphology Stauroneis pachycephala ecology Envekadea biogeography taxonomy lectotype |
description |
Stauroneis pachycephala was described in 1881 fromthe 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. Islam Atazadeha, Mark B. Edlundb, Bart Van der Vijvercd, Keely Millsaek, Sarah A. Spauldingf, Peter A. Gella, Simon Crawfordg, Andrew F. Bartona, Sylvia S. Leeh, Kathryn E.L. Smithi, Peter Newalla, Marina Potapovaj |
format |
Article in Journal/Newspaper |
author |
Atazadeh, I. Edlund, M. Van der Vijver, B. Mills, K. Spaulding, S. Gell, P. Crawford, S. Barton, A. Lee, S. Smith, K. Newall, P. Potapova, M. |
author_facet |
Atazadeh, I. Edlund, M. Van der Vijver, B. Mills, K. Spaulding, S. Gell, P. Crawford, S. Barton, A. Lee, S. Smith, K. Newall, P. Potapova, M. |
author_sort |
Atazadeh, I. |
title |
Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
title_short |
Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
title_full |
Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
title_fullStr |
Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
title_full_unstemmed |
Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea |
title_sort |
morphology, ecology and biogeography of stauroneis pachycephala p.t. cleve (bacillariophyta) and its transfer to the genus envekadea |
publisher |
Taylor & Francis |
publishDate |
2014 |
url |
http://hdl.handle.net/2440/96747 https://doi.org/10.1080/0269249X.2014.927006 |
geographic |
Mackenzie River |
geographic_facet |
Mackenzie River |
genre |
Mackenzie river |
genre_facet |
Mackenzie river |
op_source |
http://dx.doi.org/10.1080/0269249x.2014.927006 |
op_relation |
Diatom Research, 2014; 29(4):455-464 0269-249X 2159-8347 http://hdl.handle.net/2440/96747 doi:10.1080/0269249X.2014.927006 |
op_rights |
© 2014 The International Society for Diatom Research |
op_doi |
https://doi.org/10.1080/0269249X.2014.92700610.1080/0269249x.2014.927006 |
container_title |
Diatom Research |
container_volume |
29 |
container_issue |
4 |
container_start_page |
455 |
op_container_end_page |
464 |
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1785587195177861120 |