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<title lang=en>Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies</title>
<creator>Riaux-Gobin, Catherine</creator>
<creator>Compère, Pierre</creator>
<creator>Jordan, Richard W.</creator>
<creator>Coste, Michel</creator>
<creator>Yesilyurt, Jovita C.</creator>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) ; Université de Perpignan Via Domitia (UPVD) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Botanic Garden Meise</contributor>
<contributor>Department of Earth and Environmental Sciences ; Yamagata University</contributor>
<contributor>Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)</contributor>
<contributor>The Natural History Museum [London]</contributor>
<description>International audience</description>
<source>ISSN: 2118-9773</source>
<source>European Journal of Taxonomy</source>
<identifier>hal-01340453</identifier>
<identifier>https://hal-univ-perp.archives-ouvertes.fr/hal-01340453</identifier>
<identifier>https://hal-univ-perp.archives-ouvertes.fr/hal-01340453/document</identifier>
<identifier>https://hal-univ-perp.archives-ouvertes.fr/hal-01340453/file/329-1709-1-PB.pdf</identifier>
<source>https://hal-univ-perp.archives-ouvertes.fr/hal-01340453</source>
<source>European Journal of Taxonomy, 2016, pp.204. 〈10.5852/ejt.2016.204〉</source>
<identifier>DOI : 10.5852/ejt.2016.204</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.5852/ejt.2016.204</relation>
<language>en</language>
<subject lang=en>Cocconeis molesta</subject>
<subject lang=en>Cocconeis diaphana</subject>
<subject lang=en>Cocconeis dirupta</subject>
<subject lang=en>synonymies</subject>
<subject lang=en>types</subject>
<subject>[SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy</subject>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>F.T. Kützing introduced Cocconeis molesta with only an uninformative description and a poor illustration: C. molesta has small, oblong valves and is an epiphyte. Another species, Cocconeis diaphana, described by William Smith, is said to have larger valves than C. molesta, with frustules that are relatively oblong. Smith described two forms: one with a distinct fascia on its raphe valve (var. β), the other without this feature. A third species, Cocconeis dirupta was described by Gregory, who expressed doubts that it differed from C. diaphana. Finally, Cocconeis molesta var. crucifera Grunow was first introduced in Van Heurck's Atlas but was subsequently treated by Van Heurck as a synonym of C. molesta. No previous account has examined the type material of these species. In this paper, we undertake that task and examine type slides and raw material in order to discriminate these different taxa. We conclude by recognizing three species: Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. Cocconeis diaphana var. β is considered to be a synonym of C. dirupta and C. molesta var. crucifera is considered to be a synonym of C. molesta. Lectotypes are designated for C. diaphana and C. dirupta.</description>
<rights>http://creativecommons.org/licenses/by/</rights>
<date>2016</date>
</dc>
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