Description of two species of nassophorean (“Hypostome”) ciliates, Nassulopsis elegans (Ehrenberg, 1833) and Zosterodasys derouxi n.sp., with comments on their systematic and phylogenetic affinities

Sola, Ana; Guinea, Almudena; Fernández‐Galiano, Dimas; Longás, J.F.; Corliss, John O.

doi:10.1016/s0932-4739(11)80385-8

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…Sola et al (1990) proposed that the synhymeniids are an intermediate group between the class Phyllopharyngea and other nassophoreans, which is basically in accordance with our molecular inferences. Their assumption that synhymeniids are the most primitive group among them is, however, not supported.…”

supporting

confidence: 89%

“…The synhymeniids have been perhaps the most difficult group regarding their status and relationships with other hypostome ciliates, partly because their ontogenetic processes remain unstudied. With reference to morphological implications of their polykinetid oral ciliatures, Sola et al (1990) proposed that the genus Nassulopsis , originally assigned to the order Synhymeniida (Corliss 1979), be transferred into the order Nassulida. Therefore, only those taxa with a dikinetid synhymenium or frange were retained in the Synhymeniida, which was further proposed to be a “pivotal” primitive nassophorean that may have given rise not only to the more evolved groups of its own class (the Nassophorea) but also to the entire neighbouring class Phyllopharyngea (Sola et al 1990).…”

mentioning

confidence: 99%

“…synhymenium or frange) that is usually positioned postorally and partially or completely encircles the anterior end of the cell (Lynn 2008). Silver impregnation shows that the fibrillar systems of the synhymenium are of a somatic nature (Sola et al 1990) and ultrastructural studies also revealed that the posterior kinetosomes of the synhymenium possess kinetodesmal fibres, suggesting that this structure is more likely a component of the somatic rather than oral ciliature (Kivimaki et al 1997). Therefore, the synhymeniids (e.g.…”

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confidence: 99%

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Small Subunit rRNA Phylogenies Show that the Class Nassophorea is Not Monophyletic (Phylum Ciliophora)

Gong

Stoeck

et al. 2009

J Eukaryotic Microbiology

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The hypostome ciliates have been generally classified into two classes, Phyllopharyngea and Nassophorea. The status of Nassophorea and its relationship with Phyllopharyngea is one of the most controversial issues in ciliate systematics. Here we focus on the phylogenetic interrelationships of Nassophorea and Phyllopharyngea based on small subunit ribosomal RNA gene sequences. The three nassophorean subgroups, synhymeniids, microthoracids, and nassulids, each emerged as monophyletic, with synhymeniids as a sister group of Phyllopharyngea, and microthoracids as a sister of the synhymeniids+Phyllopharyngea clade in all phylogenies. The exact placement of the nassulids, however, remains uncertain. Following a detailed analysis of phenotypic characters, we hypothesize that: (1) the Phyllopharyngea could have evolved from synhymeniids, with the further development of their subkinetal microtubules as one of the major events; and (2) the development of monokinetid structures, as well as the reduction and specialization of the cyrtos and cortex, might have occurred during the diversifications of the microthoracids, synhymeniids, and Phyllopharyngea from a common ancestor. Expanding the class Phyllopharyngea to include the synhymeniids as a subclass, and designating a new subclass Subkinetalia n. subcl. for the group comprising cyrtophorians, chonotrichians, rhynchodians, and suctorians, are proposed.

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confidence: 89%

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confidence: 99%

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confidence: 99%

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Small Subunit rRNA Phylogenies Show that the Class Nassophorea is Not Monophyletic (Phylum Ciliophora)

Gong

Stoeck

et al. 2009

J Eukaryotic Microbiology

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“…; Sola et al. ; Vďačný and Tirjaková ; Wang et al. ) and only a few ( Arcanisutura , Chilodontopsis , Orthodonella , and Zosterodasys ) morphotypes have been linked to molecular markers, therefore a wider sampling of the synhymeniid genera is warranted to deduce and verify the character evolving process in this order.…”

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confidence: 99%

Morphology and Phylogeny of Two Novel Ciliates, Arcanisutura chongmingensis n. gen., n. sp. and Naxella paralucida n. sp. from Shanghai, China

Liao

Fan

Zhang

et al. 2017

J Eukaryotic Microbiology

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The morphologies of two novel ciliates, Arcanisutura chongmingensis n. gen., n. sp. and Naxella paralucida n. sp., collected from Shanghai, China, have been investigated using live observation and silver staining methods. Arcanisutura n. gen. can be easily distinguished from related genera by its inconspicuous, oblique anterior suture. Arcanisutura chongmingensis n. sp. is mainly recognized by its elongated body with a tail-like posterior end, 25-33 somatic kineties, and 4-11 excretory pores. Naxella paralucida n. sp. can be distinguished from its congeners based on its two short nassulid organelles, fusiform trichocysts, 37-49 somatic kineties, and 16 nematodesmal rods. The small-subunit (SSU) rRNA gene sequences of these two species are presented, revealing the phylogenetic positions of Arcanisutura and Naxella. Phylogenetic analyses show that Arcanisutura forms a sister clade to other synhymeniid genera, namely, Chilodontopsis, Orthodonella, and Zosterodasys; Naxella is most closely related to Nassula spp. and is located within the monophyletic clade of the family Nassulidae.

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Influence of environmental characteristics on the distribution of ciliates in the River Henares (Central Spain)

Sola¹,

Serrano

Guinea

1996

Hydrobiologia

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We studied the composition distribution and dynamics of ciliated protozoan communities as well as their relationships with the physical-chemical characteristics of their environment in the River Henares (Central Spain) .A total of 67 species belonging to 54 genera were identified . Thirty-four species were subjected to statistical treatment using absence-presence data . Principal component analysis reduced the number of variables to two factors which accounted for 84 .73% of total variance . The first axis grouped non-conservative variables which strongly depended on biological activity. This axis was identified with `nutrient status and pollution level' . In contrast the second factor included conservative variables poorly influenced by the activity of organisms . This axis was identified with the `water mineral content' . From the arrangement of different species of ciliates with regard to these two factors and using non-hierarchic cluster analysis we established three different groups with respect to each factor.The saprobiological characterization of the different sampling points indicated that three different stretches can be distinguished in all seasons and we propose some tentative relationshps between chemical and biological variables which characterize the different levels of saprobity in this river.

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Description of two species of nassophorean (“Hypostome”) ciliates, Nassulopsis elegans (Ehrenberg, 1833) and Zosterodasys derouxi n.sp., with comments on their systematic and phylogenetic affinities

Cited by 3 publications

References 6 publications

Small Subunit rRNA Phylogenies Show that the Class Nassophorea is Not Monophyletic (Phylum Ciliophora)

Small Subunit rRNA Phylogenies Show that the Class Nassophorea is Not Monophyletic (Phylum Ciliophora)

Morphology and Phylogeny of Two Novel Ciliates, Arcanisutura chongmingensis n. gen., n. sp. and Naxella paralucida n. sp. from Shanghai, China

Influence of environmental characteristics on the distribution of ciliates in the River Henares (Central Spain)

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