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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/5380

Title: Morphology and Morphogenesis of a New Marine Ciliate, Apokeronopsis Bergeri Nov. Spec. (Ciliophora, Hypotrichida), from the Yellow Sea, China
Authors: Li, Liqiong
Song, Weibo
Warren, Alan
Al-Rasheid, A.S.
Roberts, David
Yi, Zhenzhen
Al-Farraj, Saleh A.
Hu, Xiaozhong
Keywords: Apokeronopsis bergeri nov. spec.
ITS and 5.8S rDNA sequence
Issue Date: 2008
Publisher: Elsevier
Citation: European Journal of Protistology: 44 ; 208–219
Abstract: The morphology and morphogenesis of a new marine hypotrich ciliate, Apokeronopsis bergeri nov. spec., collected from mussel-farming waters near Qingdao, China, are described from living and protargol-impregnated specimens. This ciliate has characteristics that place it in the family Pseudokeronopsidae, namely, two long rows of frontal cirri (bicorona), which are continuous with the long midventral rows, and a single row of marginal cirri on each side of the body. It shares with its only congener, Apokeronopsis crassa, the long rows of buccal and transverse cirri and the wide spacing between the midventral rows of cirri. These characters separate the genus Apokeronopsis from Pseudokeronopsis, which has a single buccal cirrus, fewer transverse cirri and midventral rows of cirri arranged in a typical zig-zag pattern. A. bergeri differs from A. crassa in its shape, colour and in the numbers of membranelles and transverse cirri. Although morphogenesis in A. bergeri is similar to that of A. crassa in most respects, the mode of formation of the buccal cirri is slightly different. The close relationship of A. bergeri with A. crassa, and the more distant relationship with three Pseudokeronopsis species, is supported by a comparison of the sequences of their ITS1- 5.8S-ITS2 rDNA regions.
URI: http://dx.doi.org/10.1016/j.ejop.2008.01.001
ISSN: 0932-4739
Appears in Collections:College of Science

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