Ultrastructural and molecular characterization of diversity among small araphid diatoms all lacking rimoportulae. I. Five new genera, eight new species

Li Chun , M.P. Ashworth , Andrzej Witkowski , Christopher S. Lobban , Izabela Zgłobicka , Krzysztof Kurzydłowski , S. Qin

Abstract

Pennate diatoms are important contributors to primary production in freshwater and marine habitats. But the extent of their diversity, ecology, and evolution is still largely unknown. This is particularly evident among the clades of pennate diatoms without raphe slits, whose diversity is likely underestimated due to their small size and features that can be difficult to discern under light microscopy. In this study, we described five new araphid genera with eight new species based on morphological observations (light and electron microscopy) and molecular data (nuclear-encoded small subunit ribosomal RNA and chloroplastencoded rbcL and psbC): Serratifera varisterna, Hendeyella rhombica, H. dimeregrammopsis, H. lineata, Psammotaenia lanceolata, Castoridens striata, C. hyalina, and Cratericulifera shandongensis. We also transferred Dimeregramma dubium to Hendeyella dubia. Phylogenetic analysis of the molecular data revealed that all the newly established taxa fell into a monophyletic group, with Fragilariforma virescens located at the base. The group was composed by two subclades: one comprising Castoridens, Cratericulifera, and Plagiostriata, and the larger including also the rest of the new genera plus some of the smallest known diatoms, such as Nanofrustulum, Opephora, Pseudostaurosira, Staurosirella, and Staurosira with a high level of support. This study enhances the general knowledge on the phylogeny and biodiversity of a group of small araphid diatoms that have been generally poorly described both by electron microscopy and DNA sequence data.
Author Li Chun - [Szczecin University (USz)]
Li Chun,,
-
- Uniwersytet Szczeciński
, M.P. Ashworth
M.P. Ashworth,,
-
, Andrzej Witkowski - Szczecin University (USz)
Andrzej Witkowski,,
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, Christopher S. Lobban - Division of Natural Sciences, University of Guam, Mangilao, Guam 96923, USA
Christopher S. Lobban,,
-
, Izabela Zgłobicka ZPM
Izabela Zgłobicka,,
- Division of Materials Design
, Krzysztof Kurzydłowski ZPM
Krzysztof Kurzydłowski,,
- Division of Materials Design
, S. Qin
S. Qin,,
-
Journal seriesJournal of Phycology, ISSN 0022-3646
Issue year2016
Vol52
Pages1018-1036
Publication size in sheets0.9
Keywords in Polishokrzemki arafowe, różnorodność biologiczna; Fragilariaceae; filogeneza; PSBC; rbcL; okrzemki małych komórkach; rRNA SS
Keywords in EnglishAraphid diatoms; biodiversity; Fragilariaceae; phylogeny; psbC; rbcL; small-celled diatoms; SSU rRNA
DOIDOI:10.1111/jpy.12460
URL http://onlinelibrary.wiley.com/doi/10.1111/jpy.12460/abstract
Languageen angielski
File
Li et al 2016.pdf (file archived - login or check accessibility on faculty) Li et al 2016.pdf 2.99 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.608 (2) - 2016=2.809 (5)
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