Phycological and oecological conditions at the breaking and closing of the ice in ponds of the 
Norther Waldviertel (Lower Austria)

Wawrik, Friederike

doi:10.1127/nova.hedwigia/30/1979/851

Cited by 2 publications

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“…muramotoi differs from C . gutenbrunnensis , however, in its smaller vegetative cells (8.5–13.3 μm wide and 12.3–19.5 μm long vs. up to 23 μm wide and up to 27 μm long) and eyespot positions [anterior half to one third (Figs 5 and 6B) vs. posterior half [40]]. Chloromonas hyperstigmata possesses quite a large disc-shaped eyespot (diameter up to one fourth of the cell length [41]), whereas, such a large eyespot has never been observed in C .…”

Section: Discussionmentioning

confidence: 99%

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Taxonomic re-examination of “Chloromonas nivalis (Volvocales, Chlorophyceae) zygotes” from Japan and description of C. muramotoi sp. nov.

et al. 2019

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Recent molecular data has strongly suggested that field-collected cysts of snow algae that are morphologically identifiable as the zygotes of Chloromonas nivalis are composed of multiple species. Motile vegetative cells, however, have not been directly obtained from these cysts because of the difficulties involved in inducing their germination. Recently, our comparative molecular analyses, using both field-collected and cultured materials, demonstrated that one Japanese lineage of “C. nivalis zygotes” belongs to C. miwae. Herein, we examined another Japanese lineage of field-collected “C. nivalis zygotes” and a new strain originating from Japan. Our molecular data demonstrated that these two different life cycle stages are conspecific, and that they represent a new species that we herein describe as C. muramotoi sp. nov., based on the vegetative and asexual morphological characteristics of the strain. Multigene phylogenetic analyses showed that this new species was sister to C. miwae. Scanning electron microscopy demonstrated that the cysts of C. muramotoi are different from those of C. miwae, based on the arrangement of the flanges developing on the cell wall.

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Section: Discussionmentioning

confidence: 99%

“…Chloromonas gutenbrunnensis was collected from an ice-covered pond in winter [40], and C . hyperstigmata was sampled from a small pond with many fallen leaves in autumn [41].…”

Section: Discussionmentioning

confidence: 99%

Taxonomic re-examination of “Chloromonas nivalis (Volvocales, Chlorophyceae) zygotes” from Japan and description of C. muramotoi sp. nov.

et al. 2019

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“…Sexuality is only known from very few species -Mallomonas caudata, M. akrokomos, Synura petersenii, and a few others [40,41], and even in these it is very rarely observed and can hardly be a regular link in their life histories. And this means that sexual mechanisms cannot be of help in any definition.…”

Section: Species Concept In the Synuraceaementioning

confidence: 99%

Problems in classification and identification of Synuraceae (Chrysophyceae)

Kristiansen

1978

Schweiz. Z. Hydrologie

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In the Synuraceae, the silica scales which cover the cell surface are of great taxonomic importance, although their delicate structure requires use of electron microscopy. Many species have been incompletely described by means of light microscopy, and there are serious difficulties in correlating them with species based on electron microscopy of the silica scales. The different types of variation in scale structure are described, and the variation range to be accepted within a species is discussed. However, as sexual reproduction is of rare occurrence in this family, the species concept must be highly arbitrary. It is reassuring then that many species based on scale ultrastructure also exhibit morphological and ecological characteristics. The advantages of scanning and transmission electron microscopy are emphasized for species identification and for detection of small forms with especially delicate scales.

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Phycological and oecological conditions at the breaking and closing of the ice in ponds of the Norther Waldviertel (Lower Austria)

Cited by 2 publications

References 0 publications

Taxonomic re-examination of “Chloromonas nivalis (Volvocales, Chlorophyceae) zygotes” from Japan and description of C. muramotoi sp. nov.

Taxonomic re-examination of “Chloromonas nivalis (Volvocales, Chlorophyceae) zygotes” from Japan and description of C. muramotoi sp. nov.

Problems in classification and identification of Synuraceae (Chrysophyceae)

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