The genus <i>Paraphysomonas</i> from Indian rivers, lakes, ponds and tanks

Wujek, Daniel E.; Saha, L. C.

doi:10.1017/cbo9780511752292.018

Cited by 2 publications

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“…This species differs from all other Paraphysomonas species in terms of scale and spine dimensions and in having scattered irregular perforations of the base-plate. Remarkably, extremely similar scales were reported by Wujek & Saha [ 65 ] regarding Indian material. It is unknown whether such irregular perforations have taxonomic value, or if they are caused by problems in silicification, but it is very likely that our scales represent currently undescribed species.…”

Section: Resultssupporting

confidence: 86%

“…For instance, in mainland Malaysia, only 30 taxa have been registered [ 13 ]. During the investigation of more than 200 Indian waterbodies, 58 taxa of silica-scaled chrysophytes have been reported [ 15 , 16 , 65 ]. Studies of 11 Chinese provinces located in the tropical and subtropical parts of the country revealed only 49 taxa of silica-scaled chrysophytes [ 19 , 20 ].…”

Section: Discussionmentioning

confidence: 99%

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Diversity of Silica-Scaled Chrysophytes of Two Tropical Islands: Phu Quoc and Con Son (Viet Nam)

Gusev

Martynenko

Kapustin

et al. 2022

Life

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The present paper focuses on the silica-scaled chrysophytes from two tropical islands: Con Son (Con Dao Archipelago) and Phu Quoc, located in Viet Nam. Electron microscopy revealed fifty-seven taxa, of which forty-one belong to the genus Mallomonas. The others are species of the genera Synura (5), Paraphysomonas (8), Spiniferomonas (1), Chrysosphaerella (1) and Lepidochromonas (1). This is the first report of the genus Lepidochromonas from Viet Nam. In addition, two species from the genus Paraphysomonas are reported for the first time in the country. Six taxa from the genus Mallomonas and five taxa from the genus Paraphysomonas were not identifiable to the lower rank and may represent new species for science. The overall diversity of the silica-scaled chrysophytes of the islands is very high. A number of rare taxa endemic to Southeast Asia were found.

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Section: Resultssupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Diversity of Silica-Scaled Chrysophytes of Two Tropical Islands: Phu Quoc and Con Son (Viet Nam)

Gusev

Martynenko

Kapustin

et al. 2022

Life

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“…Obviously, this goal cannot be attained in a single study but rather is an ongoing effort, and it is a necessity for any probe applied to natural communities of organisms. There are approximately 50 species of Paraphysomonas that have been described up to the present time (Preisig andHibberd 1983, Wujek andSaha 1995), and we have tested the specificity of our probes only against four of these species. Whereas similarity in scale morphology would indicate that we have used some of the most appropriate species for this work (i.e.…”

Section: Discussionmentioning

confidence: 99%

MOLECULAR PHYLOGENETIC ANALYSIS OF THE HETEROTROPHIC CHRYSOPHYTE GENUS PARAPHYSOMONAS (CHRYSOPHYCEAE), AND THE DESIGN OF rRNA‐TARGETED OLIGONUCLEOTIDE PROBES FOR TWO SPECIES

Caron

Lim

Dennett

et al. 1999

Journal of Phycology

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Nanoflagellate protists are algae and protozoa (2-20 m in size) that play important ecological roles in freshwater and marine microbial communities as primary producers and as consumers of prokaryotic and eukaryotic prey. There is little biogeographical information for most of these minute protists despite their significant role in aquatic food webs. In addition, the evolutionary relationships among some of these species and their affinities to other protistan taxa are unclear. These circumstances are largely a consequence of the fact that small protists possess few readily apparent morphological features on which to base taxonomic and phylogenetic schemes and with which to identify them in natural assemblages. As an alternative approach for addressing these issues, we sequenced the small-subunit ribosomal RNA genes of four species of the colorless chrysophyte genus Paraphysomonas. A phylogenetic analysis based on that sequence information was performed, and oligonucleotide probes for two commonly occurring species of Paraphysomonas were designed and tested. Phylogenetic analyses of these four species confirmed the affinity of the genus Paraphysomonas with other chrysophyte species. High sequence similarity among three of the species (P. imperforata Lucas, P. bandaiensis Takahashi, and P. foraminifera Lucas) supported a previous phylogenetic grouping of these species based on the morphology of the scales produced by these species. In particular, sequence similarity between P. imperforata and P. foraminifera indicated that this speciation was a recent evolutionary event. However, a fourth species (P. vestita (Stokes) de Saedeleer) possessing similar scale morphology to P. bandaiensis, P. imperforata, and P. foraminifera showed considerable sequence dissimilarity in comparison to these latter three species. Oligonucleotide probes were successfully designed for the species P. imperforata and P. bandaiensis and applied together with a recently de-1 veloped quantitative in situ hybridization procedure. The development of species-specific oligonucleotide probes for these nanoflagellate species and their application for counting nanoflagellates in natural water samples provide tools for studying these ecologically important species.

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The genus Paraphysomonas from Indian rivers, lakes, ponds and tanks

Cited by 2 publications

References 0 publications

Diversity of Silica-Scaled Chrysophytes of Two Tropical Islands: Phu Quoc and Con Son (Viet Nam)

Diversity of Silica-Scaled Chrysophytes of Two Tropical Islands: Phu Quoc and Con Son (Viet Nam)

MOLECULAR PHYLOGENETIC ANALYSIS OF THE HETEROTROPHIC CHRYSOPHYTE GENUS PARAPHYSOMONAS (CHRYSOPHYCEAE), AND THE DESIGN OF rRNA‐TARGETED OLIGONUCLEOTIDE PROBES FOR TWO SPECIES

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