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Correspondence
Published: 2017-05-16

Two new generic names for dinophytes harbouring a diatom as an endosymbiont, Blixaea and Unruhdinium (Kryptoperidiniaceae, Peridiniales)

Department Biologie, Systematische Botanik und Mykologie, GeoBio-Center, Ludwig-Maximilians-Universität München, Menzinger Str. 67, D–80638 München, Germany
Department Biologie, Systematische Botanik und Mykologie, GeoBio-Center, Ludwig-Maximilians-Universität München, Menzinger Str. 67, D–80638 München, Germany
Department Biologie, Systematische Botanik und Mykologie, GeoBio-Center, Ludwig-Maximilians-Universität München, Menzinger Str. 67, D–80638 München, Germany
Third Institute of Oceanography, State Oceanic Administration, 361005 Xiamen, China
dinoflagellate endosymbiont taxonomy Algae

Abstract

Kryptoperidiniaceae are a small group of dinophytes hosting a tertiary endosymbiont derived from a diatom (Tomas et al. 1973, Horiguchi & Pienaar 1994). Those so called ‘dinotoms’ (Imanian et al. 2011) include Dinothrix, Durinskia, Galeidinium, Kryptoperidinium (= Phyllodinium) and some species currently assigned to “Peridiniopsis and Peridinium (Tamura et al. 2005, Horiguchi & Takano 2006, Hansen et al. 2007, Zhang et al. 2011). Besides ‘possessing a diatom endosymbiont’ as a highly derived trait, the monophyly of Kryptoperidiniaceae is also supported by a unique type of eyespot that has possibly derived from the original chloroplast (Moestrup & Daugbjerg 2007). In molecular trees, Kryptoperidiniaceae constitute a well supported monophyletic group (Kretschmann et al. unpubl.), but it is not finally resolved at present, whether they are embedded in the Thoracosphaeraceae or constitute their sister group (Gottschling & McLean 2013). Regarding habitat preference, molecular trees further indicate at least two independent marine→freshwater transitions in the Kryptoperidiniaceae during the late Paleogene at the latest (Žerdoner Čalasan et al. unpubl.).