Redescription of <i>Favella ehrenbergii</i> (Claparède and Lachmann, 1858) Jörgensen, 1924 (Ciliophora: Choreotrichia), with Phylogenetic Analyses Based on Small Subunit rRNA Gene Sequences

Kim, Sun Young; Yang, Eun Jin; Gong, Jun; Choi, Joong Ki

doi:10.1111/j.1550-7408.2010.00500.x

Cited by 30 publications

(44 citation statements)

References 20 publications

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“…The evolution in the majority of freshwater tintinnids with the two de novo‐originating ventral organelles was described in detail by Agatha and Strüder‐Kypke (), while new data on Favella ehrenbergii (Claparède and Lachmann, ) Jörgensen, provided by Kim S. Y. et al. (), F. panamensis (this study), and F. arcuata (this study) necessitate an update of the evolutionary hypothesis on tintinnids with a ventral kinety. In these tintinnids, the dikinetids of the right and left ciliary fields, except for the anteriormost ones, transformed into ciliated monokinetids, producing the pattern of Nolaclusilis Snyder and Brownlee, (Fig.…”

Section: Resultsmentioning

confidence: 64%

Reconciling Cladistic and Genetic Analyses in Choreotrichid Ciliates (Ciliophora, Spirotricha, Oligotrichea)

Agatha

Strüder‐Kypke

2012

J Eukaryotic Microbiology

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Fifty-six features of halteriid, oligotrichid, and choreotrichid ciliates are cladistically analysed, including an updated hypothesis about the evolution of the somatic ciliary patterns. Based on its morphology, Lynnella clusters with Parastrombidinopsis, Parastrombidium, and Strombidinopsis, while it is basal to the other choreotrichids in the molecular phylogenies. The two clusters of Favella species in small subunit rRNA gene trees are supported by morphological features, justifying a separation at genus and family level. The genus Favella has a smooth lorica surface and a somatic ciliary pattern comprising a left and lateral ciliary field as well as two dorsal kineties and a monokinetidal ventral kinety abutting on the right ciliary field. The new genus Schmidingerella n. gen., established for the second Favella cluster, groups with Metacylis and Rhabdonella in the molecular trees. It differs from Favella in (i) a lorica wall with reticulate surface ridges and minute openings and (ii) a ventral kinety that is distinctly apart from the right ciliary field and composed of a monokinetidal anterior and a dikinetidal posterior portion. The genera Codonaria, Codonella, and Codonellopsis are affiliated with the family Dictyocystidae, whose diagnosis is improved to include the lorica sac.

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Section: Resultsmentioning

confidence: 64%

Reconciling Cladistic and Genetic Analyses in Choreotrichid Ciliates (Ciliophora, Spirotricha, Oligotrichea)

Agatha

Strüder‐Kypke

2012

J Eukaryotic Microbiology

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“…Comparison of the ciliate host sequences to GenBank sequences by the use of BLASTn often yielded very close matches, although an exact identity between novel and GenBank sequences was found only in the case of Favella ehrenbergii and F. panamensis (AY143572), which may be synonymous (26). In other cases, such as that of E. pectinis, very similar sequences (4 base differences across 1,685 sites) attributed to the same species were found in GenBank.…”

Section: Host Morphometrymentioning

confidence: 87%

Molecular Diversity of the Syndinean Genus Euduboscquella Based on Single-Cell PCR Analysis

Bachvaroff

Kim

Guillou

et al. 2012

Appl Environ Microbiol

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The genus Euduboscquella is one of a few described genera within the syndinean dinoflagellates, an enigmatic lineage with abundant diversity in marine environmental clone libraries based on small subunit (SSU) rRNA. The region composed of the SSU through to the partial large subunit (LSU) rRNA was determined from 40 individual tintinnid ciliate loricae infected with Euduboscquella sampled from eight surface water sites in the Northern Hemisphere, producing seven distinct SSU sequences. The corresponding host SSU rRNA region was also amplified from eight host species. The SSU tree of Euduboscquella and syndinean group I sequences from environmental clones had seven well-supported clades and one poorly supported clade across data sets from 57 to 692 total sequences. The genus Euduboscquella consistently formed a supported monophyletic clade within a single subclade of group I sequences. For most parasites with identical SSU sequences, the more variable internal transcribed spacer (ITS) to LSU rRNA regions were polymorphic at 3 to 10 sites. However, in E. cachoni there was variation between ITS to LSU copies at up to 20 sites within an individual, while in a parasite of Tintinnopsis spp., variation between different individuals ranged up to 19 polymorphic sites. However, applying the compensatory base change model to the ITS2 sequences suggested no compensatory changes within or between individuals with the same SSU sequence, while one to four compensatory changes between individuals with similar but not identical SSU sequences were found. Comparisons between host and parasite phylogenies do not suggest a simple pattern of host or parasite specificity.

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“…This result implies that there are many cryptic species within the Tintinnida, just as with other planktonic taxa such as diatoms (Amato et al 2007), copepods (Chen & Hare 2008) and aloricate ciliates (Katz et al 2005). On the one hand, studies with laboratory cultures of tintinnid species have shown that size and morphology of the lorica can vary greatly even within a single species (Gold 1968, 1973, Kim et al 2010). On the other hand, the present study showed that even if there are no notable differences in the size and shape of the loricae between tintinnids, they do not necessarily share the same descendant and thus the same genealogical position.…”

Section: Discussionmentioning

confidence: 99%

“…According to the nuclear SSrRNA phylogeny, specimens of F. ehrenbergii from Korea were close to F. panamensis Kofoid & Campbell and F. campanula, while specimens of F. ehrenbergii from eastern North America were close to F. taraikaensis (from northern China) and Metacylis sp. Since lorica morphology is very similar between F. ehrenbergii and F. taraikaensis, Kim et al (2010) suggested that Snoeyenbos-West et al (2002) might have misidentified their species. However, both specimens of F. ehrenbergii and F. taraikaensis from Sendai Bay were found not only in clade A but also in clade B, and formed subclades within each clade with other morphospecies.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Kim et al (2010) showed that specimens of Favella ehrenbergii from the coastal waters of Incheon, Korea differed genetically from those collected by Snoeyenbos-West et al (2002) along the east coast of North America. According to the nuclear SSrRNA phylogeny, specimens of F. ehrenbergii from Korea were close to F. panamensis Kofoid & Campbell and F. campanula, while specimens of F. ehrenbergii from eastern North America were close to F. taraikaensis (from northern China) and Metacylis sp.…”

Section: Discussionmentioning

confidence: 99%

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Discrepancy between conventional morphological systematics and nuclear phylogeny of tintinnids (Ciliophora: Choreotrichia)

Kazama

Ishida

Shimano

et al. 2012

Plankton Benthos Res

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Tintinnid ciliates have been traditionally classified according to morphological and morphometric features of the lorica. To examine if the morphological characteristics of loricae reflect the phylogenetic relationships, we collected 23 tintinnid morphospecies (11 genera) and reconstructed phylogenetic trees based on 84 partial sequences of nuclear small subunit rRNA (SSrRNA) gene fragments of 44 morphospecies from a total of eight families (55 sequences from this study, and 29 sequences from the literature). We found that tintinnid ciliates could be classified into six clades consisting of five major clades. While one clade consisted of one family, each of the other five clades consisted of more than two families. Although two families were found only in one clade, the remaining six families were found in more than two clades. In addition, each of six morphospecies was found in more than two major clades, indicating that they are polyphyletic. Principal coordinate analysis showed that morphology of the lorica overlapped substantially between the clades. These results imply that most of the morphological and morphometric traits of marine tintinnid species do not reflect SSrRNA genetic distances even at family levels. It is necessary to identify new characteristics that reflect phylogenetic relationships robustly.

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Redescription of Favella ehrenbergii (Claparède and Lachmann, 1858) Jörgensen, 1924 (Ciliophora: Choreotrichia), with Phylogenetic Analyses Based on Small Subunit rRNA Gene Sequences

Cited by 30 publications

References 20 publications

Reconciling Cladistic and Genetic Analyses in Choreotrichid Ciliates (Ciliophora, Spirotricha, Oligotrichea)

Reconciling Cladistic and Genetic Analyses in Choreotrichid Ciliates (Ciliophora, Spirotricha, Oligotrichea)

Molecular Diversity of the Syndinean Genus Euduboscquella Based on Single-Cell PCR Analysis

Discrepancy between conventional morphological systematics and nuclear phylogeny of tintinnids (Ciliophora: Choreotrichia)

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