Fensomea setacea, gen. & sp. nov. (Cladopyxidaceae, Dinophyceae), is neither gonyaulacoid nor peridinioid as inferred from morphological and molecular data

Type Article
Date 2021-06
Language English
Author(s) Gottschling Marc1, Carbonell-Moore Maria Consuelo2, Mertens Kenneth3, Kirsch Monika4, Elbrächter Malte5, Tillmann Urban6
Affiliation(s) 1 : Department Biologie: Systematik, Biodiversität & Evolution der Pflanzen, GeoBio-Center, Ludwig‐Maximilians-Universität München, Menzinger Str. 67, 80 638, München, Germany
2 : Department of Botany and Plant Pathology, College of Agricultural Sciences, Oregon State University, 2082 Cordley Hall, Corvallis, OR, 97331-2902, USA
3 : Ifremer, LITTORAL, Station de Biologie Marine, Place de la Croix, BP40537, 29900, Concarneau CEDEX, France
4 : Fachbereich Geowissenschaften-Fachrichtung Historische Geologie/Paläontologie, Universität Bremen, Klagenfurter Straße, 28359, Bremen, Germany
5 : Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Sylt, Hafenstr. 43, 25 992, List/Sylt, Germany
6 : Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27 570, Bremerhaven, Germany
Source Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2021-06 , Vol. 11 , N. 1 , P. 12824 (14p.)
DOI 10.1038/s41598-021-92107-0
WOS© Times Cited 1
Abstract

Dinophyte evolution is essentially inferred from the pattern of thecal plates, and two different labelling systems are used for the important subgroups Gonyaulacales and Peridiniales. The partiform hypotheca of cladopyxidoid dinophytes fits into the morphological concepts of neither group, although they are assigned to the Gonyaulacales. Here, we describe the thecate dinophyte Fensomea setacea, gen. & sp. nov., which has a cladopyxidoid tabulation. The cells displayed a Kofoidean plate formula APC, 3′, 4a, 7″, 7C, 6S, 6′′′, 2′′′′, and slender processes were randomly distributed over the echinate or baculate surface. In addition, we obtained rRNA sequences of F. setacea, gen. & sp. nov., but dinophytes that exhibit a partiform hypotheca did not show a close relationship to Gonyaulacales. Character evolution of thecate dinophytes may have progressed from the ancestral state of six postcingular plates, and two more or less symmetrically arranged antapical plates, towards patterns of only five postcingular plates (Peridiniales) or more asymmetrical configurations (Gonyaulacales). Based on our phylogenetic reconsiderations the contact between the posterior sulcal plate and the first postcingular plate, as well as the contact between an antapical plate and the distalmost postcingular plate, do not represent a rare, specialized gonyaulacoid plate configuration (i.e., the partiform hypotheca of cladopyxidoid dinophytes). Instead, these contacts correspond to the common and regular configuration of peridinioid (and other) dinophytes.

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Gottschling Marc, Carbonell-Moore Maria Consuelo, Mertens Kenneth, Kirsch Monika, Elbrächter Malte, Tillmann Urban (2021). Fensomea setacea, gen. & sp. nov. (Cladopyxidaceae, Dinophyceae), is neither gonyaulacoid nor peridinioid as inferred from morphological and molecular data. Scientific Reports, 11(1), 12824 (14p.). Publisher's official version : https://doi.org/10.1038/s41598-021-92107-0 , Open Access version : https://archimer.ifremer.fr/doc/00700/81224/