Format

Send to

Choose Destination
See comment in PubMed Commons below
Eur J Protistol. 2017 Aug;60:119-133. doi: 10.1016/j.ejop.2017.05.001. Epub 2017 May 17.

Morphologic and phylogenetic studies of two hypotrichous ciliates, with notes on morphogenesis in Gastrostyla steinii Engelmann, 1862 (Ciliophora, Hypotrichia).

Author information

1
Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China; Department of Biological Sciences, Boise State University, Boise 83725, USA.
2
Marine College, Shandong University, Weihai 264209, China; Department of Biological Sciences, University of Ulsan, Ulsan 44610, Korea.
3
Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
4
Department of Biological Sciences, Boise State University, Boise 83725, USA.
5
Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Science, South China Normal University, Guangzhou 510631, China. Electronic address: xlin@scnu.edu.cn.
6
Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China. Electronic address: xiaozhonghu@ouc.edu.cn.

Abstract

Two oxytrichid ciliates, Stylonychia (Metastylonychia) nodulinucleata Shi and Li, 1993 and Gastrostyla steinii Engelmann, 1862; collected from Huguangyan Maar Lake and Shenzhen Mangrove Nature Protection Area, southern China, respectively, were investigated using standard methods. The uncommon species Stylonychia (Metastylonychia) nodulinucleata can be recognized by its large body size, the conspicuous caudal cirri in vivo, and a moniliform macronucleus. We provide the first record of the small subunit ribosomal RNA (SSU rRNA) gene sequence for the species. The division of Stylonychia into two subgenera based on morphological and morphogenetic data is supported by the phylogenetic analyses, in which Stylonychia (Metastylonychia) nodulinucleata is placed as a sister branch to the clade including all the sequences of Stylonychia (Stylonychia) mytilus complex. The first brackish water population of Gastrostyla steinii is described in detail, with emphasis on its morphogenesis, which corresponds well with previous populations. In the phylogenetic trees, all the available Gastrostyla sequences, except for Gastrostyla sp. Y2 (KT780432) (probably a misidentification), nest together in the big group of the subfamily Stylonychinae with moderate to high support (ML/BI, 91%/0.95), very likely revealing the monophyly of the genus Gastrostyla.

KEYWORDS:

Classification; Ontogenesis; Oxytrichid ciliates; Redescription; SSU rRNA; Stylonychia (Metastylonychia) nodulinucleata

PMID:
28595933
DOI:
10.1016/j.ejop.2017.05.001
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center