<i>Bysmatrum austrafrum sp. nov</i>. (Dinophyceae), a novel tidal pool dinoflagellate from South Africa

Dawut, Mahmutjan; Sym, Stuart D.; Suda, Shoichiro; Horiguchi, Takeo

doi:10.2216/17-54.1

Cited by 6 publications

(6 citation statements)

References 24 publications

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“…This is consistent with the finding of a type A eyespot in other species of family Peridiniopsidaceae, such as Palatinus apiculatus (Craveiro et al, 2009). A type B eyespot in J. chumphonensis is not surprising since a type B eyespot was also reported in Peridiniopsis borgei (Calado & Moestrup, 2002) and both types may occur in species of the same genus such as Bysmatrum (Dawut et al, 2018;Luo et al, 2018). A type A eyespot was also reported in Peridinium cinctum, the type species of family Peridiniaceae (Spector & Triemer, 1979), supporting its systematic significance at family or higher taxonomic level (Lindberg et al, 2005).…”

Section: Eyespotsupporting

confidence: 89%

Morphology, ultrastructure and molecular phylogeny of Johsia chumphonensis gen. et sp. nov. and Parvodinium parvulum comb. nov. (Peridiniopsidaceae, Dinophyceae)

Luo

Mertens

et al. 2020

European Journal of Phycology

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The family Peridiniopsidaceae encompasses mainly freshwater species of the genera Peridiniopsis, Palatinus and Parvodinium. Only one benthic, marine species 'Scrippsiella' hexapraecingula has been attributed to this family. Here we established five strains by isolating single Parvodinium-like cells from the marine Gulf of Thailand, Hainan Island waters (China), off Manado (Indonesia) and from a freshwater reservoir in Fuzhou (China). All strains were examined with light, scanning and transmission electron microscopy, and their SSU, ITS-5.8S and partial LSU rRNA regions were sequenced. Four marine strains share a plate formula of Po, cp, X, 4′, 2a, 6′′, 6C, 4S, 5′′′, 2′′′′ and are herein attributed to a new genus Johsia as J. chumphonensis gen. et sp. nov. Its theca is characterized by an epitheca 1.5 times as long as the hypotheca in dorsal view and a 2a plate about half the size of 1a. A type B eyespot was observed in J. chumphonensis comprising two rows of lipid globules within a chloroplast with a single row of crystals overlying the eyespot. Production of spherical cysts was observed in culture. The freshwater strain shows a plate pattern of Po, cp, X, 4′, 2a, 7′′, 6C, 5S, 5′′′, 2′′′′, characterized by two unequal antapical plates and a lack of antapical spines, fitting the description of Peridinium parvulum, which was transferred to Parvodinium as P. parvulum comb. nov. In this species, a type A eyespot was observed comprising four rows of lipid globules within a chloroplast. A molecular phylogeny was inferred based on concatenated data from SSU, ITS-5.8S and partial LSU rRNA gene sequences using maximum likelihood and Bayesian inference. Our results show that Johsia is nested within the Peridiniopsidaceae and is a sister clade to Peridiniopsis borgei and the strain UTEX1948 identified as 'Scrippsiella' hexapraecingula with three anterior intercalary plates.Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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Section: Eyespotsupporting

confidence: 89%

Morphology, ultrastructure and molecular phylogeny of Johsia chumphonensis gen. et sp. nov. and Parvodinium parvulum comb. nov. (Peridiniopsidaceae, Dinophyceae)

Luo

Mertens

et al. 2020

European Journal of Phycology

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“…Consequently, it is quite difficult to distinguish B. subsalsum from B. austrafrum, based on their morphological features. Nevertheless, different types of eyespots have been reported in B. subsalsum and B. austrafrum [6,8]. Based on the types of eyespots suggested by Moestrup and Daugbjerg [21], B. subsalsum has the Type B eyespot, whereas B. austrafrum presents the Type A eyespot.…”

Section: Morphological Comparisons Of Korean Isolates Of Bysmatrum Subsalsum With Other Isolates Of B Subsalsum and B Austrafrummentioning

confidence: 99%

“…This species has a typical plate of Po, X, 4 , 3a, 7", 6C, 4S, 5 , 2 for the genus Bysmatrum and is morphologically characterized by dimensions of 25-45 µm long and 20-42.5 µm wide, arranged reticulation in the thecal plates, the possession of an equatorially positioned cingulum and a cingulum displaced by a distance exceeding its own width. Based on these morphological features, Dawut et al [6] reported that B. austrafrum is similar to B. subsalsum, and concluded that B. austrafrum can be distinguished from B. subsalsum by differences in cell size, the shape of the APC and apical plate 1 . However, cell sizes recorded in B. austrafrum were recorded in the other specimens of B. subsalsum (see Table 2 in Luo et al [8]), and the shapes of the APC and apical plate 1 of B. austrafrum quite resembled those of Korean isolates and the specimens of B. subsalsum recorded by Luo et al [8].…”

Section: Morphological Comparisons Of Korean Isolates Of Bysmatrum Subsalsum With Other Isolates Of B Subsalsum and B Austrafrummentioning

confidence: 99%

“…Luo et al [8] recorded B. subsalsum in plankton and sediment samples, and Anglès et al [7] found B. subsalsum in mangrove detritus and salt marshes. In Korean isolates of B. subsalsum, the species is considered to inhabit tidal pools, and B. austrafrum was also discovered in tidal pools in South Africa [6]. In comparison with B. subsalsum, other Bysmatrum species, such as B. teres, B. granulosum, B. arenicola and B. gregarium have been reported in the restricted habitats (Luo et al [8] and reference therein).…”

Section: Environmental Conditions In Relation To the Growth Of Bysmtrum Subsalsummentioning

confidence: 99%

“…Faust and K.A. Steidinger as the type species have been reported so far [1][2][3][4][5][6] and, within the genus, the Bysmatrum species) can be distinguished from each other by the differences in cell size and shape, plate ornamentation, cingulum displacement, the morphology of the apical pore complex (APC), nucleus position, habitat and habitus [1,4,5,7,8]. However, molecular data for Bysmatrum species are as yet available for only five species; B. arenicola T. Horiguchi [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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First Report of the Marine Benthic Dinoflagellate Bysmatrum subsalsum from Korean Tidal Pools

Park

Kim

et al. 2021

JMSE

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Dense patches were observed in the tidal pools of the southern area of Korea. To clarify the causative organisms, the cells were collected and their morphological features were examined using light and scanning electron microscopy (SEM). In addition, after establishing strains for the cells the molecular phylogeny was inferred with concatenated small subunit (SSU) and large subunit (LSU) rRNA sequences. The cells were characterized by a nucleus in the hypotheca, strong reticulations in thecal plates, the separation of plates 2a and 3a, the tear-shaped apical pore complex, an elongated rectangular 1a plate and the absence of the right sulcal list. The thecal plate formula was Po, X, 4′, 3a, 7″, 6c, 4S, 5′′′, 2′′′′. Based on these morphological features, the cells were identified as Bysmatrum subsalsum. In the culture, the spherical cysts of B. subsalsum without thecal plates were observed. Molecular phylogeny revealed two ribotypes of B. subsalsum are identified; The Korean isolates were nested within the ribotype B consisting of the isolates from China, Malaysia and the French Atlantic, whereas the ribotype A includes only the isolates from the Mediterranean Sea. In the phylogeny, B. subsalsum and B. austrafrum were grouped. This can be supported by the morphological similarity between the two species, indicating that the two species may be conspecific, however B. subsalsum may distinguish from B. austrafrum, because of differences in the types of eyespots reported in previous studies. These findings support the idea that there is cryptic diversity within B. subsalsum.

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Biodiversity study of the genus Bysmatrum from the South China Sea and France reveals a new benthic dinoflagellate, Bysmatrum ingrilense sp. nov . (Peridiniales, Dinophyceae)

Gu,

Tian,

Mertens

et al. 2024

Phycologia

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Bysmatrum austrafrum sp. nov. (Dinophyceae), a novel tidal pool dinoflagellate from South Africa

Cited by 6 publications

References 24 publications

Morphology, ultrastructure and molecular phylogeny of Johsia chumphonensis gen. et sp. nov. and Parvodinium parvulum comb. nov. (Peridiniopsidaceae, Dinophyceae)

Morphology, ultrastructure and molecular phylogeny of Johsia chumphonensis gen. et sp. nov. and Parvodinium parvulum comb. nov. (Peridiniopsidaceae, Dinophyceae)

First Report of the Marine Benthic Dinoflagellate Bysmatrum subsalsum from Korean Tidal Pools

Biodiversity study of the genus Bysmatrum from the South China Sea and France reveals a new benthic dinoflagellate, Bysmatrum ingrilense sp. nov . (Peridiniales, Dinophyceae)

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