

FOLLOWUS
1. Laboratory of Protozoology Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education College of Life Science South China Normal University
2. Laboratory of Protozoology Institute of Evolution and Marine Biodiversity Ocean University of China
3. Biology Department North Carolina Central University
4. Zoology Department King Saud University
Online First:29 June 2010,
Published:2010
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Zhang, Q., Yi, Z., Xu, D. et al. Molecular phylogeny of oligotrich genera Omegastrombidium and Novistrombidium (Protozoa, Ciliophora) for the systematical relationships within Family Strombidiidae., Chin. J. Ocean. Limnol. 28, 769–777 (2010). https://doi.org/10.1007/s00343-010-9096-0
The phylogeny of the oligotrich ciliates is currently a hot debate despite the availability of both morphological and molecular data. In the present paper
further small subunit rRNA (SS rRNA) genes were analyzed from the Genera Omegastrombidium and Novistrombidium
as well as from Strombidium
and combined with three new SS rRNA sequences from Strombidium basimorphum
S. sulcatum population QD-1
and Novistrombidium testaceum population GD. The phylogenetic positions of these organisms were inferred using Bayesian inference
Maximum Likelihood
and Maximum Parsimony methods. The main results are: (1) the SS rRNA gene sequence analyses match the recent findings about the molecular evolution of oligotrichs
indicating that the family Strombidiidae is paraphyletic; (2) the Genus Omegastrombidium is separated from the Genus Strombidium
as shown in recent cladistic analyses; (3) morphospecies in Genus Novistrombidium
based on similarity of somatic ciliature
are separated from each other in all topological trees
indicating that this genus could be a paraphyletic group; (4) the molecular data indicate a possibility of paraphyly for the genus Strombidium; and (5) the similarities of the SS rRNA gene of specimens identified as S. sulcatum and S. inclinatum are 99.8%–100%. However
present knowledge on the oligotrichs sensu stricto is still insufficient and further studies based on both molecular and other technologies are required.
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