Gertia stigmatica gen. et sp. nov. (Kareniaceae, Dinophyceae), a New Marine Unarmored Dinoflagellate Possessing the Peridinin-type Chloroplast with an Eyespot

Takahashi, Kazuya; Benico, Garry; Lum, Wai Mun; Iwataki, Mitsunori

doi:10.1016/j.protis.2019.125680

Cited by 36 publications

(37 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The numbers of amphiesmal rows on the cingulum and hypocone of S. gracilenta (four and seven) were larger than those of Gertia stigmatica (three and five; Takahashi et al. 2019). Shimiella gracilenta has CC, C1, C2, and CF, whereas G. stigmatica has C1, C2, and C3.…”

Section: Discussionmentioning

confidence: 95%

“…2019, Takahashi et al. 2019). Similar to S. gracilenta , which lost plastids from ingested T. amphioxeia cells during starvation, the “Ross Sea dinoflagellate” forming a clade with S. gracilenta has been revealed to be kleptoplastidic (Gast et al.…”

Section: Discussionmentioning

confidence: 98%

“…2019, Takahashi et al. 2019). Shimiella gracilenta , A. gracile and G. stigmatica have an apical furrow consisting of AVs and an apical ridge on the right side of the furrow.…”

Section: Discussionmentioning

confidence: 98%

“…The cingulum of S. gracilenta is deeply incised, whereas that of G. stigmatica is shallowly incised (Takahashi et al. 2019). Thus, the uppermost cingulum row in S. gracilenta may become a CC, and the lowermost cingulum row in S. gracilenta may become a CF.…”

Section: Discussionmentioning

confidence: 99%

“…And recently, Gertia was assigned to Kareniaceae, but it possesses peridinin instead of fucoxanthin (Takahashi et al. 2019). Furthermore, a kleptoplastidic dinoflagellate, the so‐called Ross Sea dinoflagellate, phylogenetically belongs to this family, but does not have its own plastids (Gast et al.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Shimiella gen. nov. and Shimiella gracilenta sp. nov. (Dinophyceae, Kareniaceae), a Kleptoplastidic Dinoflagellate from Korean Waters and its Survival under Starvation

Jeong

Lee

et al. 2020

Journal of Phycology

View full text Add to dashboard Cite

A small dinoflagellate, ~13 μm in cell length, was isolated from Jinhae Bay, Korea. Light microscopy showed that it was similar to the kleptoplastidic dinoflagellate Gymnodinium gracilentum nom. inval. rDNA sequences were obtained and its anatomy and morphology described using light and scanning and transmission electron microscopy. Phylogenetic analyses indicated that it belonged to the family Kareniaceae. However, its large subunit (LSU) rDNA sequences were 5.2–9.5% different from those of the other five genera in the family, and its clade was clearly divergent from that of each genus. Its overall morphology was different from those of the other five genera in the family and from Gymnodinium. Unlike Gymnodinium, this dinoflagellate did not have a horseshoe‐shaped apical groove, nuclear envelope chambers, or a nuclear fibrous connective (NFC). It had an apical line of narrow amphiesmal vesicles and an elongated apical furrow crossing the apex. Cells were covered with polygonal amphiesmal vesicles arranged in 16 rows. Starved cells did not contain their own plastids, eyespots, pyrenoids, peridinin, or fucoxanthin. However, they could survive without added prey for approximately one month using chloroplasts from the cryptophyte prey Teleaulax amphioxeia, indicating kleptoplastidy. Because this taxon is genetically distinct at the generic rank from the other genera in Kareniaceae, it is placed in Shimiella gen. nov., and because G. gracilentum was invalid, the new bionomial S. gracilenta sp. nov. is proposed.

show abstract

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 98%

“…2019, Takahashi et al. 2019). Shimiella gracilenta , A. gracile and G. stigmatica have an apical furrow consisting of AVs and an apical ridge on the right side of the furrow.…”

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations