Morphology and molecular phylogeny of a widely distributed but little-known sand-dwelling phototrophic dinoflagellate,<i>Coutea sabulosa gen</i>. &amp;<i>sp. nov</i>. (Dinophyceae, Alveolata)

Chomérat, Nicolas; Saburova, Maria; Bilien, Gwenaël; Zentz, Frédéric; Hoppenrath, Mona

doi:10.1080/00318884.2023.2188006

Cited by 3 publications

(1 citation statement)

References 49 publications

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“…Dinoflagellate diversity has been estimated at about 2400 species belonging to 259 genera [1,2], and the numbers of species and genera are continuously growing as more novel taxa have been identified and described [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These species play essential roles in the ecosystem as important primary producers.…”

Section: Introductionmentioning

confidence: 99%

Morphological and Molecular Characterization of the Unarmored Dinoflagellate Gymnodinium trapeziforme (Dinophyceae) from Jiaozhou Bay, China

Gao,

Hu,

Luo

et al. 2023

Diversity

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The genus Gymnodinium contains more than 230 extant species, approximately 30% of which have not been reported since their original description. Approximately eight Gymnodinium species have been reported or described in the coastal waters of China. This work reports the presence of Gymnodinium trapeziforme from Jiaozhou Bay, China, in 2020, and its morphological and phylogenetic characterization by using light and scanning electron microscopy and systematic analysis based on partial LSU rDNA sequences. We observed the typical diagnostic features of G. trapeziforme, including a small size, biconical to ovoid shape, and a sulcal extension intruded to the epicone and connected to the horseshoe-shaped apical structure complex (ASC). Additionally, we firstly observed that the ASC consisted of three parallel series of vesicles, with the central one possessing knobs, and having more than 10 amphiesmal vesicles within the ASC. The nucleus was cucurbit-shaped, and the amphiesmal vesicles covering the cell surface, which would be peeled off for the cells in stress. While our molecular phylogeny inferred with the maximum likelihood (ML) and Bayesian inference (BI) confirmed the conspecificity of our isolate with the holotype G. trapeziforme (accession No. EF192414), we found a difference of 14 bases in the D1–D6 domains of the LSU rDNA sequences between the two entities, which indicates a detectable speciation of the two populations. Our work provides a detailed morphological and molecular characterization of G. trapeziforme that was isolated from the coastal water of China, which also broadens the geographical distribution of this species.

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Section: Introductionmentioning

confidence: 99%

Morphological and Molecular Characterization of the Unarmored Dinoflagellate Gymnodinium trapeziforme (Dinophyceae) from Jiaozhou Bay, China

Gao,

Hu,

Luo

et al. 2023

Diversity

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Morpho-molecular characterization of sand-dwelling dinoflagellate communities from the German Wadden Sea and insights into their spatiotemporal distribution

Reñé,

Timoneda,

Khodami

et al. 2023

European Journal of Phycology

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New morphological data for two rare species of sand-dwelling marine dinoflagellates, Amphidiniella sedentaria and Pachena cf. leibnizii

Selina,

Morozova

2024

Botanica Marina

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Benthic dinoflagellates have been the subject of extensive taxonomic research in recent decades. Studies of morphologies of already known species of benthic dinoflagellates from various geographical populations remain relevant, as these allow elucidation of some details that were overlooked in the original species descriptions or assessment of their morphological variability. In the present study, two rare species of dinoflagellates, Amphidiniella sedentaria and Pachena cf. leibnizii, have been studied, for the first time, from coastal sands of the northwestern Sea of Japan. In the cells of A. sedentaria from the Sea of Japan, we have found two anterior intercalar plates instead of one. Therefore, the original formula has been changed to APC 4′ 2a 7″ 5c 4s 6‴ 2⁗. As a result of the examination of P. cf. leibnizii from the Sea of Japan, we have counted seven precingular plates and six cingular plates, instead of six and five, respectively, indicated in the original description. The plate formula of the cells of P. cf. leibnizii from the Sea of Japan is APC 4′ 3a 7″ 6c 5s 5‴ 2⁗. It is currently difficult to judge whether these differences are morphological variations. Therefore, we have identified these cells as P. cf. leibnizii.

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Morphology and molecular phylogeny of a widely distributed but little-known sand-dwelling phototrophic dinoflagellate,Coutea sabulosa gen. &sp. nov. (Dinophyceae, Alveolata)

Cited by 3 publications

References 49 publications

Morphological and Molecular Characterization of the Unarmored Dinoflagellate Gymnodinium trapeziforme (Dinophyceae) from Jiaozhou Bay, China

Morphological and Molecular Characterization of the Unarmored Dinoflagellate Gymnodinium trapeziforme (Dinophyceae) from Jiaozhou Bay, China

Morpho-molecular characterization of sand-dwelling dinoflagellate communities from the German Wadden Sea and insights into their spatiotemporal distribution

New morphological data for two rare species of sand-dwelling marine dinoflagellates, Amphidiniella sedentaria and Pachena cf. leibnizii

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