A manual of the infusoria, including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign and an account of the organization and affinities of the sponges

Kent, W. Saville

doi:10.5962/bhl.title.1243

Cited by 22 publications

(25 citation statements)

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“…In the nineteenth century, ciliates, along with flagellates and other aquatic microbial eukaryotes, were the subject of extensive studies that focused on anatomy, cortical and ciliary structure, and reproduction (22, 55). Currently, these microbial eukaryotes provide model systems for the study of several problems in genetics, molecular biology, and biochemistry, such as genome organization, cellular structure, endo- and exocytosis, motility, ecology, and evolution.…”

Section: Early Historymentioning

confidence: 99%

RNA-Mediated Epigenetic Programming of Genome Rearrangements

Nowacki

Shetty

Landweber

2011

Annu. Rev. Genom. Hum. Genet.

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RNA, normally thought of as a conduit in gene expression, has a novel mode of action in ciliated protozoa. Maternal RNA templates provide both an organizing guide for DNA rearrangements and a template that can transport somatic mutations to the next generation. This opportunity for RNA-mediated genome rearrangement and DNA repair is profound in the ciliate Oxytricha, which deletes 95% of its germline genome during development in a process that severely fragments its chromosomes and then sorts and reorders the hundreds of thousands of pieces remaining. Oxytricha’s somatic nuclear genome is therefore an epigenome formed through RNA templates and signals arising from the previous generation. Furthermore, this mechanism of RNA-mediated epigenetic inheritance can function across multiple generations, and the discovery of maternal template RNA molecules has revealed new biological roles for RNA and has hinted at the power of RNA molecules to sculpt genomic information in cells.

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Section: Early Historymentioning

confidence: 99%

RNA-Mediated Epigenetic Programming of Genome Rearrangements

Nowacki

Shetty

Landweber

2011

Annu. Rev. Genom. Hum. Genet.

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“…In their revisions, Kent listed 21 species [6] , Awerinzew 10 species [7] , and Kahl 84 species [8] , [9] , while the most recent monographs published in 1985 and 1986 [10] , [11] considered 127 species of aloricate Oligotrichea. The rate of discovery ( Figure 1 ) reflects the introduction and improvement of light microscopy (period ∼1860–1960) for the study of live and preserved specimens and the introduction of cytological staining methods (i.e., protargol and silver nitrate impregnation; period ∼1980–present) to reveal the ciliary pattern and nuclear apparatus.…”

Section: Introductionmentioning

confidence: 99%

Global Diversity of Aloricate Oligotrichea (Protista, Ciliophora, Spirotricha) in Marine and Brackish Sea Water

Agatha

2011

PLoS ONE

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Oligotrichids and choreotrichids are ciliate taxa contributing to the multi-step microbial food web and episodically dominating the marine microzooplankton. The global diversity and distribution of aloricate Oligotrichea are unknown. Here, the geographic ranges of the 141 accepted species and their synonyms in marine and brackish sea water are analyzed, using hundreds of taxonomical and ecological studies; the quality of the records is simultaneously evaluated. The aloricate Oligotrichea match the moderate endemicity model, i.e., the majority (94) of morphospecies has a wide, occasionally cosmopolitan distribution, while 47 morphospecies show biogeographic patterns: they are restricted to single geographic regions and probably include 12 endemic morphospecies. These endemics are found in the Antarctic, North Pacific, and Black Sea, whereas the “flagship” species Strombidinopsis cercionis is confined to the Caribbean Sea. Concerning genera, again several geographic patterns are recognizable. The species richness is distinctly lower in the southern hemisphere than in the northern, ranging from nine morphospecies in the South Pacific to 95 in the North Atlantic; however, this pattern is probably caused by undersampling. Since the loss of species might affect higher trophical levels substantially, the aloricate Oligotrichea should not any longer be ignored in conservation issues. The ecophysiological diversity is considerably larger than the morphological, and even tops the richness of SSrRNA and ITS haplotypes, indicating that probably more than 83–89% of the diversity in aloricate Oligotrichea are unknown. The huge challenge to discover all these species can only be managed by combining the expertises of morphological taxonomists, molecular biologists, ecologists, and physiologists.

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“…Up to now, more than 70 species have been described (de Bory and Vincent ; Corliss ; Ehrenberg ; Ji et al. , , ; Kahl , ; Kent 1880–1882; Precht ; Sommer ; Stiller ). About one‐third of these have been investigated in respect to both living morphology and characters of the silverline system and infraciliature (Clamp , ; Foissner and Schiffmann ; Foissner et al.…”

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confidence: 99%

Morphology and Phylogenetic Placement of Three New Zoothamnium species (Ciliophora: Peritrichia) from Coastal Waters of Southern China

Shen

et al. 2016

J Eukaryotic Microbiology

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The morphology, infraciliature, and silverline system of three peritrichous ciliates, Zoothamnium bucciniiformum sp. n., Zoothamnium florens sp. n., and Zoothamnium zhanjiangense sp. n., were investigated based on both living and silver-stained specimens. Zoothamnium bucciniiformum sp. n., collected from coastal waters (salinity 30‰) off Zhanjiang, southern China, can be distinguished by the following characters: dichotomously branched stalk, peristomial lip with medial circumferential infolding, contractile vacuole apically positioned, 32-49 silverlines between the anterior end and the aboral trochal band, 15-26 between the aboral trochal band and the scopula; two kineties in peniculus 3, not parallel to each other. Zoothamnium florens sp. n., collected from a mangrove wetland (salinity 13‰) off Zhanjiang, is characterized by its large conical zooid, tuberculate peristomial lip, asymmetrical dichotomously branched colony, 59-81 silverlines between the anterior end and the aboral trochal band and 29-36 between the aboral trochal band and the scopula. Zoothamnium zhanjiangense, collected from a mangrove wetland (salinity about 9.5‰) off Zhanjiang, differs from its congeners by the alternately branched stalk, peristomial lip with medial circumferential infolding, 40-63 silverlines from the peristomial area to the aboral trochal band and 13-24 from the aboral trochal band to the scopula. The comparison and analysis of SSU rDNA sequences also support present identifications.

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A manual of the infusoria, including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign and an account of the organization and affinities of the sponges

Cited by 22 publications

References 0 publications

RNA-Mediated Epigenetic Programming of Genome Rearrangements

RNA-Mediated Epigenetic Programming of Genome Rearrangements

Global Diversity of Aloricate Oligotrichea (Protista, Ciliophora, Spirotricha) in Marine and Brackish Sea Water

Morphology and Phylogenetic Placement of Three New Zoothamnium species (Ciliophora: Peritrichia) from Coastal Waters of Southern China

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