Morphology and SSU rRNA gene-based phylogeny of two Diophrys-like ciliates from northern china, with notes on morphogenesis of Pseudodiophrys nigricans (Protozoa, Ciliophora)
Version of Record online: 29 NOV 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Morphology
Volume 274, Issue 4, pages 395–403, April 2013
How to Cite
Fan, Y., Warren, A., Al-Farraj, S. A., Chen, X. and Shao, C. (2013), Morphology and SSU rRNA gene-based phylogeny of two Diophrys-like ciliates from northern china, with notes on morphogenesis of Pseudodiophrys nigricans (Protozoa, Ciliophora). J. Morphol., 274: 395–403. doi: 10.1002/jmor.20097
- Issue online: 6 MAR 2013
- Version of Record online: 29 NOV 2012
- Manuscript Accepted: 2 AUG 2012
- Manuscript Revised: 19 JUL 2012
- Manuscript Received: 13 APR 2012
- Natural Science of Foundation of China. Grant Numbers: Project Number: 31172041, 40906065
- marine ciliates;
Two free-living marine euplotid ciliates, Pseudodiophrys nigricans and Diophrys japonica, collected from the coastal waters off Qingdao, northern China, were investigated using live observations and protargol impregnation methods. The cortical development of P. nigricans was observed during binary division. Although its general pattern of morphogenesis is similar to that of other Diophrys-like species, three unusual features are noteworthy: 1) the frontoventral transverse cirral anlagen develop in the secondary mode, similar to that of Euplotes; 2) the undulating membrane anlage migrates far from the cytostome and does not split into two membranes; and 3) the parental adoral zone of membranelles remains nearly intact throughout the entire morphogenetic process. Diophrys japonica is redescribed based on a Chinese population and can be recognized by having one left marginal cirrus, densely arranged cortical granules, and a fragment kinety with three dikinetids. Phylogenetic analyses based on the small subunit rRNA (SSU rRNA) gene sequence data indicate that D. japonica is placed within the Diophrys clade and is most closely related to the well-known D. apoligothrix. © J. Morphol., 2013. © 2012 Wiley Periodicals, Inc.