Ultrastructure of the marine benthic dinoflagellate<i>Plagiodinium belizeanum</i>(Dinophyceae) from the southeast Pacific island of Okinawa, Japan

Wakeman, Kevin C.; Hoppenrath, Mona; Yamaguchi, Aika; Gavelis, Greg S.; Leander, Brian S.; Nozaki, Hisayoshi

doi:10.2216/17-43.1

Cited by 5 publications

(11 citation statements)

References 39 publications

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“…Another difference is that in P. belizeanum the presence of a distinct apical pore was demonstrated (Wakeman et al . ), while in P. ballux , the pore identified as apical pore is rather obscure. The location of the pore of both species is also slightly different, i.e.…”

Section: Discussionmentioning

confidence: 93%

“…Our interpretation of the thecal plate arrangement of P. ballux (Po, 1′, 0a, 5″, 5C, 2S, 5‴, 0p, 1″″) is basically similar to that of P. belizeanum by Wakeman et al . (). When the cingulum, i.e.…”

Section: Discussionmentioning

confidence: 97%

“…More recently, however, Wakeman et al . () proposed a different interpretation of the thecal plate arrangement for P. belizeanum , due to discovery of an additional tiny apical plate, i.e. Po, 1′, 0a, 5″, 5(6)C, 4S, 5‴, 0p, 1″″.…”

Section: Discussionmentioning

confidence: 99%

“…The type species of the genus Plagiodinium , P. belizeanum Faust & Balech from Twin Cays, Belize (Faust & Balech ), is sand‐dwelling, armored, laterally‐flattened dinoflagellates with a small epitheca (Faust & Balech ; Wakeman et al . ). The novel species has a much smaller epitheca than P. belizeanum.…”

Section: Introductionmentioning

confidence: 97%

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Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan

Yamada

Dawut

Terada

et al. 2018

Phycological Research

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SUMMARY A new species of marine sand‐dwelling dinoflagellate, Plagiodinium ballux N. Yamada, Dawut, R. Terada & T. Horiguchi is described from a deep (36 m) seafloor off Takeshima Island, Kagoshima Prefecture, Japan in the subtropical region of the northwest Pacific. The species is thecate and superficially resembles species of Prorocentrum, but possesses an extremely small epitheca. The cell varies from ovoid to a rounded square, and is small (15.0–22.5 μm in length) and laterally compressed. The thecal plates are smooth and the thecal plate arrangement (Po, 1′, 0a, 5″, 5C, 2S, 5‴, 0p, 1″″) is similar to that of Plagiodinium belizeanum, the type species of the genus. Molecular phylogenetic analyses based on SSU rDNA and partial LSU rDNA reveal that the dinoflagellate is closely related to P. belizeanum, but it can be clearly distinguished by its size and cell shape. This suite of morphological and molecular differences leads to the conclusion that this deep benthic dinoflagellate represents a new species of the genus Plagiodinium.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan

Yamada

Dawut

Terada

et al. 2018

Phycological Research

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“…For example, Madanidinium has no apical pore (Chomérat and Bilien ); Plagiodinium has no precingular or no apical plate series (Faust and Balech , Wakeman et al. ), depending on interpretation; Thecadinium sensu stricto and Pseudothecadinium have only incomplete precingular plate series and other special plate arrangements (Efimova et al. , Selina et al.…”

mentioning

confidence: 99%

Morphology and Molecular Phylogeny of a New Marine, Sand‐dwelling Dinoflagellate Genus,Pachena(Dinophyceae), with Descriptions of Three New Species

Hoppenrath

Reñé

Satta

et al. 2020

Journal of Phycology

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Marine benthic dinoflagellates are interesting not only because some epiphytic genera can cause harmful algal blooms but also for understanding dinoflagellate evolution and diversification. Our understanding of their biodiversity is far from complete, and many thecate genera have unusual tabulation patterns that are difficult to relate to the diverse known phytoplankton taxa. A new sand‐dwelling genus, Pachena gen. nov., is described based on morphological and DNA sequence data. Three species were discovered in distant locations and are circumscribed, namely, P. leibnizii sp. nov. from Canada, P. abriliae sp. nov. from Spain, and P. meriddae sp. nov. from Italy. All species are tiny (about 9–23 μm long) and heterotrophic. Species are characterized by their tabulation (APC 4′ 3a 6′′ 5c 5s 5′′′ 2′′′′), an apical hook covering the apical pore, an ascending cingulum, and a sulcus with central list. The first anterior intercalary plate is uniquely “sandwiched” between two plates. The species share these features and differ in the relative sizes and arrangements of their plates, especially on the epitheca. The ornamentation of thecal plates is species‐specific. The new molecular phylogenies based on SSU and LSU rDNA sequences contribute to understanding the evolution of the planktonic relatives of Pachena, the Thoracosphaeraceae.

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Oxytoxaceae are prorocentralean rather than peridinialean dinophytes and taxonomic clarification of heterotrophic Oxytoxum lohmannii (≡ “Amphidinium” crassum) by epitypification

Gottschling,

Wietkamp,

Bantle

et al. 2024

Sci Rep

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During evolution of Dinophyceae, size reduction of the episome has occurred in several lineages (including unarmoured Amphidiniales and armoured Prorocentrales). One such species is Amphidinium crassum, whose taxonomic identity is elusive though showing morphological similarities with Oxytoxaceae (currently placed in armoured Peridiniales). Plankton samples were taken at the type locality of A. crassum in Kiel Bight (Baltic Sea) in order to establish monoclonal strains. The protist material was examined in detail using light and electron microscopy, and a long (2984 bp) ribosomal RNA sequence gained was part of a taxon sample comprising 206 specimen vouchers and representing the known molecular diversity of Dinophyceae. Cells of A. crassum were ovoid and exhibited a plate pattern po, 4′, 1a, 6′′, 5c, 4s, 5′′′, 1′′′′. In the molecular phylogeny, the species seemed to belong neither to Amphidiniales nor to Peridiniales but to Prorocentrales and clustered with other representatives of Oxytoxaceae. The morphological diversity of Prorocentrales appears thus expanded, and the group may include a number of previously unrecognised representatives unusually having five postcingular and only a single antapical plate. The taxonomic identity of A. crassum is clarified by epitypification, and the species notably exhibits both an apical pore and an additional epithecal pore.

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Ultrastructure of the marine benthic dinoflagellatePlagiodinium belizeanum(Dinophyceae) from the southeast Pacific island of Okinawa, Japan

Cited by 5 publications

References 39 publications

Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan

Plagiodinium ballux sp. nov. (Dinophyceae), a deep (36 m) sand dwelling dinoflagellate from subtropical Japan

Morphology and Molecular Phylogeny of a New Marine, Sand‐dwelling Dinoflagellate Genus,Pachena(Dinophyceae), with Descriptions of Three New Species

Oxytoxaceae are prorocentralean rather than peridinialean dinophytes and taxonomic clarification of heterotrophic Oxytoxum lohmannii (≡ “Amphidinium” crassum) by epitypification

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