The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira

Chun L. Li , Andrzej Witkowski , Matt P. Ashworth , Przemysław Dąbek , Shinya Sato , Izabela Zgłobicka , Małgorzata Witak , Jong Seong Khim , Chun-Jung Kwon

Abstract

Dozens of monoclonal cultures of small-celled araphid diatoms from brackish or marine habitats worldwide were analyzed using morphological observations (light and electron microscopy) and molecular data (nuclear-encoded small subunit ribosomal RNA and chloroplast encoded rbcL and psbC). As a result, we established one new genus Gedaniella, distinguished by a shared morphological character (occlusions of branched volae, projecting from the apical sides of the areolae) and some molecular data, including five new species: G. alfred-wegeneri, G. arenaria, G. boltonii, G. panicellus, G. paucistriata and three new combinations: G. flavovirens, G. guenter-grassii and G. mutabilis. Additionally we describe eleven novel species within the existing genus Serratifera: S. andersonii, S. brevis, S. clavata, S. corallina, S. namibica, S. nosybeana, S. parkii, S. punctata, S. rhombica, S. sourniae, S. takanoi and one new combination S. opephoroides. Furthermore, five new taxa or combinations were described within other genera: such as Cratericulifera crinigera, Nanofrustulum wachnickianum, Plagiostriata baltica, Pseudostaurosira madagascariensis and Stauroforma rinceana. Detailed descriptions for established species are also provided: Nanofrustulum shiloi, Opephora pacifica and Pseudostaurosira elliptica. This study strongly suggests that the complete biodiversity of small-celled araphids is still far from known, and many species currently placed in Opephora and Pseudostaurosira need to be further re-investigated.
Author Chun L. Li
Chun L. Li,,
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, Andrzej Witkowski
Andrzej Witkowski,,
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, Matt P. Ashworth
Matt P. Ashworth,,
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, Przemysław Dąbek
Przemysław Dąbek,,
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, Shinya Sato
Shinya Sato,,
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, Izabela Zgłobicka
Izabela Zgłobicka,,
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, Małgorzata Witak (FOG / IO / DMG)
Małgorzata Witak,,
- Division of Marine Geology
, Jong Seong Khim
Jong Seong Khim,,
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, Chun-Jung Kwon
Chun-Jung Kwon,,
-
Journal seriesPhytotaxa, ISSN 1179-3155, (A 25 pkt)
Issue year2018
Vol355
No1
Pages 1-104
Keywords in EnglishAraphid diatoms, biodiversity, molecular taxonomy phylogeny, small-celled
ASJC Classification1110 Plant Science; 1105 Ecology, Evolution, Behavior and Systematics
DOIDOI:10.11646/phytotaxa.355.1.1
Languageen angielski
Score (nominal)25
ScoreMinisterial score = 25.0, 30-09-2019, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.741; WoS Impact Factor: 2017 = 1.185 (2) - 2017=1.168 (5)
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