Journal article
Morphology, ecology and biogeography of Stauroneis pachycephala PT Cleve (Bacillariophyta) and its transfer to the genus Envekadea
Diatom research, v 29(4), pp 455-464
01 Jan 2014
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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Details
- Title
- Morphology, ecology and biogeography of Stauroneis pachycephala PT Cleve (Bacillariophyta) and its transfer to the genus Envekadea
- Creators
- Islam Atazadeh - Federation UniversityMark B. Edlund - Science Museum of MinnesotaBart Van der Vijver - Meise Botanic GardenKeely Mills - Federation UniversitySarah A. Spaulding - University of Colorado BoulderPeter A. Gell - Federation UniversitySimon Crawford - University of MelbourneAndrew F. Barton - Federation UniversitySylvia S. Lee - Florida International UniversityKathryn E. L. Smith - United States Geological SurveyPeter Newall - Federation UniversityMarina Potapova - Drexel University
- Publication Details
- Diatom research, v 29(4), pp 455-464
- Publisher
- Taylor & Francis
- Number of pages
- 10
- Grant note
- bgs05002 / NERC; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) Grampians Wimmera Mallee Water (GWMWater, Australia) bgs05002 / Natural Environment Research Council; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) Iowa Lakeside Laboratory scholarship Federation University Australia scholarship
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Diatom Herbarium
- Web of Science ID
- WOS:000340134900011
- Scopus ID
- 2-s2.0-84904065794
- Other Identifier
- 991019169665004721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Marine & Freshwater Biology