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Morphology, ontogenesis and molecular phylogeny of Platynematum salinarum nov. spec., a new scuticociliate (Ciliophora, Scuticociliatia) from a solar saltern
Foissner, W.; Jung, J.-H.; Filker, S.; Rudolph, J.; Stoeck, T. (2014). Morphology, ontogenesis and molecular phylogeny of Platynematum salinarum nov. spec., a new scuticociliate (Ciliophora, Scuticociliatia) from a solar saltern. Eur. J. Protistol. 50(2): 174-184. https://dx.doi.org/10.1016/j.ejop.2013.10.001
In: European Journal of Protistology. Elsevier: Jena. ISSN 0932-4739; e-ISSN 1618-0429, meer
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| Trefwoorden |
Marine Sciences
Marine Sciences > Marine Sciences General
Scientific Community
Scientific Publication
Marien/Kust |
| Author keywords |
Biodiversity; Cinetochilidae; Extremophile ciliates; Hypersalineciliates; Platynematum marinum; Portugal |
| Project | Top | Auteurs |
- Association of European marine biological laboratories, meer
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| Auteurs | | Top |
- Foissner, W.
- Jung, J.-H.
- Filker, S.
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| Abstract |
Platynematum salinarum nov. spec. was discovered in a hypersaline (∼120‰) solar saltern in Portugal. Its morphology, ontogenesis, and 18S rRNA were studied with routine methods. Platynematum salinarum has a size of about 35 μm × 18 μm and differs from other platynematids (= Platynematum and PseudoPlatynematum) in having an only slightly flattened body without any spines or notches. Both, the oral and somatic infraciliature resemble other platynematids and the tetrahymenid pattern in general. The ontogenesis is scuticobuccokinetal, being unique in generating protomembranelle 1 from kinetids produced by the paroral membrane of the proter and of the scutica. This composite divides transversely: the right half becomes the paroral membrane of the opisthe, the left half transforms to opisthe's adoral membranelle 1. The scutica and the molecular sequence classify P. salinarum into the order Scuticociliatida, family Cinetochilidae. The 18S rRNA sequence shows 92.7% similarity to the closest relative deposited in public databases (the scuticociliate Sathrophilus holtae), and our study provides the first sequence for the genus Platynematum. Experiments at different salinities show growth between 120‰ and 300‰, survival at 100‰, and cell death around 60‰ salinity, characterizing P. salinarum as a true halophile. |
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