NDLI: Monophyly or polyphyly? Possible conflict between morphological and molecular interpretations of the well-known genus Zoothamnium (Ciliophora, Peritrichia)

Content Provider	Springer Nature Link
Author	Li, Lifang Ma, Honggang Al Rasheid, Khaled A. S.
Copyright Year	2015
Abstract	In this paper, we explore possible conflict between morphological and molecular interpretations of phylogenetic relationships within the well-known peritrichous genus Zoothamnium. On the basis of morphological evidence, for a long time this genus has been believed to be a well-defined monophyletic taxon. Nonetheless, Zoothamnium exhibits higher genetic diversity than the gross morphology of its species. Here, we used all available genetic information for the small subunit of ribosomal RNA (SSU rRNA) and internal transcribed spacer region (ITS1-5.8S-ITS2) for this genus to reconstruct phylogenies for four datasets (SSU rRNA, ITS1, ITS2, and ITS1-5.8S-ITS2) and a combined dataset (SSU rRNA+ITS1-5.8SITS2) using different phylogenetic methods and with consideration of the secondary structure of the genes. Confidence in phylogenetic tree selection was assessed with the approximately unbiased test. The molecular results showed both that Zoothamnium is more likely to be polyphyletic, and morphologically similar genera Zoothamnopsis and Myoschiston were always nested among Zoothamnium species. Accordingly, as with some other groups of ciliates, to understand more fully the correct phylogeny of Zoothamnium there remains a need for additional data from both morphological and molecular studies, covering additional Zoothamnium spp. and members of closely related genera (e.g. Zoothamnopsis, Myoschiston, and Epistylis).
Starting Page	490
Ending Page	499
Page Count	10
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	33
Issue Number	2
e-ISSN	19935005
Language	English
Publisher	Science Press
Publisher Date	2014-12-10
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	peritrichous ciliates Zoothamnium phylogenetic analyses monophyly polyphyly Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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