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  • WETZEL, CARLOS E.  (2)
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  • 1
    Online Resource
    Online Resource
    Sellaphora davoutiana sp. nov.: a new freshwater diatom species (Sellaphoraceae, Bacillariophyta) in lakes of Northeastern France
    Magnolia Press ; 2018
    In:  Phytotaxa Vol. 346, No. 3 ( 2018-04-06), p. 269-
    Details
    In: Phytotaxa, Magnolia Press, Vol. 346, No. 3 ( 2018-04-06), p. 269-
    Abstract: During a floristic survey of freshwater lakes in the French Grand Est region, a new Sellaphora species (Bacillariophyceae) was found. Its morphology was examined in detail using light and scanning electron microscopy to formally describe it. Sellaphora davoutiana sp. nov. has elliptic-lanceolate valves with broadly protracted, subcapitate apices. Based on available literature, it is compared to morphologically similar species such as Navicula detenta, S. sardiniensis, S. sassiana and S. smirnovii. Valve dimensions, central area shape and striae density and pattern of this new species allow its separation from them. Sellaphora davoutiana has been found in three low-mountain lakes of glacial origin in Northeastern France, with watershed on granitic substratum. Additionally, illustrations of Hustedt type material of Navicula detenta are provided, and this taxon is formally transferred to the genus Adlafia.
    Type of Medium: Online Resource
    ISSN: 1179-3163 , 1179-3155
    URL: Issue
    URL: Article
    DOI: 10.11646/phytotaxa.346.3
    DOI: 10.11646/phytotaxa.346.3.6
    Language: Unknown
    Publisher: Magnolia Press
    Publication Date: 2018
    SSG: 12
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)
    Magnolia Press ; 2016
    In:  Phytotaxa Vol. 284, No. 4 ( 2016-11-18), p. 273-
    Details
    In: Phytotaxa, Magnolia Press, Vol. 284, No. 4 ( 2016-11-18), p. 273-
    Abstract: As a part of the Monitoring Program of the European Water Framework Directive, the phytobenthos of streams and canals was studied in the Great East region of northeastern France (French part of Rhine-Meuse river basin and Seine-Normandy basin). A new species, Encyonema bonapartei was identified in canals. Its morphology was examined in detail using light and scanning electron microscopy, which showed a unique combination of measurements and shape: valves are clearly asymmetrical and semi-elliptical to semi-elliptical-lanceolate with central area extended on ventral margin by shorter or missing striae. The striation is almost parallel with areolae indistinguishable in the light microscope. This paper provides comparison with morphologically similar species: Cymbopleura hustedtii, Encyonema brehmii, E. kalbei, E. marvanii, E. reichardtii and E. yuwadeeanum. Encyonema bonapartei was first discovered in the East Canal in 2014. It was then found in the Rhône-to-Rhine Canal and Champagne and Burgundy Canal in 2015. Most likely it will spread further in connected waterways. Information on its autecology is presented using the physicochemical data of the type locality.
    Type of Medium: Online Resource
    ISSN: 1179-3163 , 1179-3155
    URL: Issue
    URL: Article
    DOI: 10.11646/phytotaxa.284.4
    DOI: 10.11646/phytotaxa.284.4.3
    Language: Unknown
    Publisher: Magnolia Press
    Publication Date: 2016
    SSG: 12
    Location Call Number Limitation Availability
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    Online Resource
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