Taxonomy and Molecular Phylogenetics of Ensiculiferaceae, fam. nov. (Peridiniales, Dinophyceae), with Consideration of their Life-history

Zhun Li, Kenneth Neil Mertens, Marc Gottschling, Haifeng Gu, Sylvia Söhner, Andrea M. Price, Fabienne Marret, Vera Pospelova, Kirsty F. Smith, Consuelo Carbonell-Moore, Elisabeth Nézan, Gwenael Bilien, Hyeon Ho Shin

Research output: Contribution to journalArticlepeer-review

Abstract

In the current circumscription, the Thoracosphaeraceae comprise all dinophytes exhibiting calcified coccoid cells produced during their life-history. Species hitherto assigned to Ensiculifera and Pentapharsodinium are mostly based on the monadoid stage of life-history, while the link to the coccoid stage (occasionally treated taxonomically distinct) is not always resolved. We investigated the different life-history stages and DNA sequence data of Ensiculifera mexicana and other species occurring in samples collected from all over the world. Based on concatenated ribosomal RNA gene sequences Ensiculiferaceae represented a distinct peridinalean branch, which showed a distant relationship to other calcareous dinophytes. Both molecular and morphological data (particularly of the coccoid stage) revealed the presence of three distinct clades within Ensiculiferaceae, which may include other dinophytes exhibiting a parasitic life-history stage. At a higher taxonomic level, Ensiculiferaceae showed relationships to parasites and endosymbionts (i.e., Blastodinium and Zooxanthella) as well as to dinophytes harbouring diatoms instead of chloroplasts. These unexpected phylogenetic relationships are corroborated by the presence of five cingular plates in all such taxa, which differs from the six cingular plates of most other Thoracosphaeraceae. We herein describe Ensiculiferaceae, emend the descriptions of Ensiculifera and Pentapharsodinium, erect Matsuokaea and provide several new combinations at the species level.

Original languageEnglish (US)
Article number125759
JournalProtist
Volume171
Issue number5
DOIs
StatePublished - Nov 2020

Bibliographical note

Funding Information:
This work was supported by the KRIBB Research Initiative Program, the Marine Biotechnology Program funded by the Ministry of Oceans and Fisheries of the Korean Government ( 20170431 ), and KIOST project ( PE99821 ). The Regional Council of Brittany , the General Council of Finistère , the urban community of Concarneau Cornouaille Agglomération and the European Regional Development Fund (ERDF) are acknowledged for funding the Sigma 300 FE-SEM at the Concarneau Marine Station. JSPS stipend for Sylvia Söhner. Partial funding for this research was provided by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant to VP. This work was supported in part by the Zuckerman STEM Leadership Program through a postdoctoral fellowship to AMP, and by a Catalyst:seeding grant (CSG-CAW1601) to KS and KNM.

Funding Information:
This work was supported by the KRIBB Research Initiative Program, the Marine Biotechnology Program funded by the Ministry of Oceans and Fisheries of the Korean Government (20170431), and KIOST project (PE99821). The Regional Council of Brittany, the General Council of Finist?re, the urban community of Concarneau Cornouaille Agglom?ration and the European Regional Development Fund (ERDF) are acknowledged for funding the Sigma 300 FE-SEM at the Concarneau Marine Station. JSPS stipend for Sylvia S?hner. Partial funding for this research was provided by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant to VP. This work was supported in part by the Zuckerman STEM Leadership Program through a postdoctoral fellowship to AMP, and by a Catalyst:seeding grant (CSG-CAW1601) to KS and KNM.

Publisher Copyright:
© 2020 Elsevier GmbH

Keywords

  • Dinoflagellate
  • molecular phylogenetics
  • parasite
  • plate overlap
  • rRNA
  • thecal plate.

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