FN Archimer Export Format PT J TI Molecular phylogeny and synonymy of Balechina gracilis comb. nov. (= Gymnodinium gracile ), a widespread polymorphic unarmored dinoflagellate (Dinophyceae) BT AF Gómez, Fernando Artigas, Luis Felipe Gast, Rebecca J. AS 1:1,2;2:2;3:3; FF 1:;2:;3:; C1 Carmen Campos Panisse 3 11500 Puerto de Santa María Spain Université du Littoral Côte d’Opale, Université de Lille, CNRS, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences 32 Av. Foch 62930 Wimereux France Woods Hole Oceanographic Institution Woods Hole Massachusetts 02543‐1049 USA C2 Carmen Campos Panisse 3 11500 Puerto de Santa María Spain UNIV LITTORAL COTE D'OPALE, FRANCE WHOI, USA IF 3.173 TC 1 UR https://archimer.ifremer.fr/doc/00676/78817/81075.pdf LA English DT Article CR ECOPEL 2018 BO Antea DE ;Dinophyta;Gymnodiniales;molecular phylogenetics;naked Dinoflagellata;new combination;taxonomy AB Gymnodinium gracile, described from the coasts of Denmark in 1881, is one of the first described unarmored dinoflagellates. Individuals which morphologically fit with the original description were isolated from the English Channel (North‐East Atlantic). The SSU rRNA gene sequences were identical to the sequences identified as Balechina pachydermata and Gymnodinium amphora from the Mediterranean Sea and Brazil. We propose the transfer of Gymnodinium gracile into the genus Balechina as B. gracilis comb. nov. These sequences constitute an independent lineage, clustering with numerous environmental sequences from polar to tropical waters. The widespread distribution, the high plasticity in size, shape and coloration and the difficulties in discerning the fine longitudinal striae have contributed to the description of numerous synonyms: Amphidinium vasculum, Balechina pachydermata (=Gymnodinium pachydermatum), Gymnodinium achromaticum, G. abbreviatum, G. amphora, G. dogielii, G. lohmannii (=G. roseum sensu Lohmann 1908), G. situla and Gyrodinium cuneatum (=G. gracile sensu Pouchet 1885). PY 2021 PD APR SO Journal Of Phycology SN 0022-3646 PU Wiley VL 57 IS 2 UT 000627560500001 BP 694 EP 697 DI 10.1111/jpy.13135 ID 78817 ER EF