Rediagnoses of closely related pigmented marine species of the genus Pseudokeronopsis (ciliophora, hypotrichida)

Wirnsberger, Erna; Larsen, Hans Find; Uhlig, G.

doi:10.1016/s0932-4739(87)80010-x

Cited by 24 publications

(28 citation statements)

References 11 publications

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“…This is consistent with the study of Li et al (2009b) which showed that Nothoholosticha is similar to Pseudokeronopsis in many respects, for example, midventral pairs arranged in a zig-zag pattern, distinctly fewer transverse cirri than midventral cirral pairs, and one marginal row on each side of the body. However, the two genera can be clearly separated by the number and arrangement of the frontal cirri (six clearly differentiated in Nothoholosticha vs. more than six, undifferentiated and arranged in a bicorona in Pseudokeronopsis) and the frontoterminal cirri (absent in Nothoholosticha vs. present in Pseudokeronopsis) (Wirnsberger, 1987;Wirnsberger et al, 1987;Song et al, 2006;Li et al, 2009b). Furthermore, based on SSrRNA and ITS1-5.8S-ITS2 region sequence data, the evolutionary similarities between N. fasciola and species of Pseudokeronopsis were lower than those among species of Pseudokeronopsis (95.60-96.16% vs. 98.44-99.23%, Table 1).…”

Section: Support For the Validity Of The Genus Nothoholostichamentioning

confidence: 99%

Molecular phylogeny ofNothoholosticha(Protozoa, Ciliophora, Urostylida) and systematic relationships of theHolosticha-complex

Warren

et al. 2010

Systematics and Biodiversity

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The marine ciliate Nothoholosticha is characterized by having a Holosticha-like ciliature pattern but without migratory frontoterminal cirri. However, its systematic position and its relationship to other members of the Holosticha-complex have not yet been resolved. In order to gain deeper insights into these relationships, the small subunit rRNA (SSrRNA) gene and the rRNA internal transcribed spacer and 5.8SrRNA (ITS1-5.8S-ITS2) region of two marine Anteholosticha species, as well as the ITS1-5.8S-ITS2 region of N. fasciola, were sequenced, and molecular trees (BI, ML, NJ and MP trees) were constructed. Although our analyses failed to conclusively resolve the phylogeny of this assemblage, certain conclusions could be drawn. Firstly, Nothoholosticha is a valid genus that is more closely related to Pseudokeronopsis than to other Holosticha-complex genera. Secondly, sequence analyses and phylogenetic trees of several Anteholosticha species revealed a high molecular diversity, which does not support the monophyly of this genus. Thirdly, the current assignment of certain well-known genera, e.g.

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Section: Support For the Validity Of The Genus Nothoholostichamentioning

confidence: 99%

Molecular phylogeny ofNothoholosticha(Protozoa, Ciliophora, Urostylida) and systematic relationships of theHolosticha-complex

Warren

et al. 2010

Systematics and Biodiversity

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“…Based on morphological and morphogenetic data, Berger () included 10 species in Pseudokeronopsis : the type species P. rubra (Ehrenberg, ) Borror & Wicklow, ; P. flava (Cohn, ) Wirnsberger et al., ; P. flavicans (Kahl, ) Borror & Wicklow, ; P. carnea (Cohn, ) Wirnsberger et al., ; P. sepetibensis Wanick & Silva‐Neto, 2004; P. similis (Stokes, 1886) Borror & Wicklow, ; P. decolor (Wallengren, 1900) Borror & Wicklow, ; P. multinucleate (Maupas, 1883) Borror & Wicklow, ; P . ovalis Kahl, ; and P. pararubra Hu et al., .…”

Section: Discussionmentioning

confidence: 99%

“…Wirnsberger et al. () neotypified P. carnea and mentioned that the species possesses only pigmented, small, and spherical cortical granules (i.e. the type I) around ciliary organelles.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Pseudokeronopsis pararubra Hu et al., was accepted as a valid species by Berger (), but was synonymized by Song et al. () with Pseudokeronopsis carnea (Cohn, ) Wirnsberger et al., . Moreover, Hu and Song () described a Chinese population under the name of Pseudokeronopsis rubra , which was confirmed by Song et al.…”

mentioning

confidence: 96%

“…However, Berger () doubted the identification and suggested that the main features of the Chinese population do not match the neotype specimens defined by Wirnsberger et al. (). Ontogenetic data might provide some clues for clearing the taxonomic confusions.…”

mentioning

confidence: 98%

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Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia)

Zhan

2017

J Eukaryotic Microbiology

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A still challenging study on ciliate systematics is to clarify the taxonomic and phylogenetic confusions of the fascinating pigmented Pseudokeronopsis species because of their high interspecific similarities. We evaluated the identities and internal relationships within Pseudokeronopsis based on morphological descriptions in combination with the 18S and ITS-5.8S rDNA genetic distances, ITS2 secondary structures and phylogenetic analyses. Results showed that (1) Pseudokeronopsis pararubra, a species ever synonymized as Pseudokeronopsis carnea, is a valid species; (2) most Chinese populations identified as Pseudokeronopsis rubra represent a new species namely Pseudokeronopsis songi sp. nov.; (3) within Pseudokeronopsis, P. carnea branched early, while P. songi sp. nov., P. flava, and P. erythrina showed close relationships and formed a sister clade with P. pararubra; (4) compared to 18S and ITS2 rDNA, ITS-5.8S rDNA is more suitable for separating Pseudokeronopsis species, with pairwise distances of 0-0.0441 at the intraspecific level and 0.0635-0.1150 at the interspecific level; and (5) the core structure of Pseudokeronopsis ITS2 includes three helices, with helix III being the longest and showing an identical pattern in conspecific populations and small differences among species. Based on the evaluation, we clarify all misidentified and dubious 18S and ITS-5.8S rDNA sequences of Pseudokeronopsis in GenBank.

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Keronopsine A und B, Abwehrstoffe des marinen Ciliaten Pseudokeronopsis rubra (Protozoa) – Nachweis durch Ex‐vivo‐HPLC

Höfle¹,

Pohlan²,

Uhlig³

et al. 1994

Angewandte Chemie

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Was geschieht, wenn Protozoen af eine HPLC‐Säule gebracht werden? Da sie keine feste Zellwand besitzen, geben sie augenblicklich ihre Inhaltsstoffe frei, die sogleich ohne Verluste und Gelegenheit zur Artefaktbildung analysiert werden (“Ex‐vivo‐HPLC”). Am Beispiel des Wimpertierchens Pseudokeronopsis rubra (Bild unten) konnte so gezeigt werden, daß in en lebenden Organismen als Speicherform die Sulfatester 1 (R1=SO3Na) vorliegen, die erst beim Zerstören der Zellen enzymatisch in die toxischeren Pyrone 1 (R1=H, Br.

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Rediagnoses of closely related pigmented marine species of the genus Pseudokeronopsis (ciliophora, hypotrichida)

Cited by 24 publications

References 11 publications

Molecular phylogeny ofNothoholosticha(Protozoa, Ciliophora, Urostylida) and systematic relationships of theHolosticha-complex

Molecular phylogeny ofNothoholosticha(Protozoa, Ciliophora, Urostylida) and systematic relationships of theHolosticha-complex

Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia)

Keronopsine A und B, Abwehrstoffe des marinen Ciliaten Pseudokeronopsis rubra (Protozoa) – Nachweis durch Ex‐vivo‐HPLC

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