Morphogenesis of the Euplotid Ciliate Uronychia binucleata Young, 1922 (Ciliophora, Hypotrichia)

Abstract

Morphogenesis of a population of the marine euplotid ciliate, Uronychia binucleata, which was found in Yellow Sea coastal waters next to a sewage outfall at a beach near Zhanqiao Pier, Qingdao, China, was investigated using protargol staining. The main pattern of morphogenesis is typical for the genus and can be summarized as follows: 1) the oral primordium in both proter and opisthe develops de novo in a subcortical pouch. In each daughter cell, the developing adoral zone of membranelles divides into two parts. The new membranelles formed in the proter’s oral primordium will replace the leftmost five parental ones; six parental membranelles are retained by the proter; 2) the undulating membranes anlage is formed and develops independently from the oral primordium within the same subcortical pouch; 3) five primary front oventral-transverse cirral anlagen appear de novo on the cell surface; 4) the marginal cirral anlagen are formed de novo; 5) the leftmost frontal cirrus develops de novo on the cell surface; 6) two caudal cirri are formed at the posterior end of the rightmost anlage while the second primordium from the right gives rise to the third caudal cirrus. In contrast to its congeners, the anlage of the leftmost frontal cirrus is formed to the right of the undulating membranes anlage and before the formation of the latter.

Journal

Journal ID (publisher-id): JOUC

Title: Journal of Ocean University of China

Publisher: Science Press and Springer (China )

ISSN (Electronic): 1672-5182

Publication date (Electronic): 07 May 2019

Publication date (Print): 01 April 2019

Volume: 18

Issue: 2

Pages: 467-473

Affiliations

¹ The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China

² Key Laboratory for Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China

³ Department of Life Sciences, Natural History Museum, London SW7 5BD, United Kingdom

⁴ School of Sciences, Tibet University, Lhasa 850000, China

⁵ Research Department for Limnology, University of Innsbruck, Mondseestrasse 9, A-5310 Mondsee

Author notes

*Corresponding author: BA Sang

Article

Publisher ID: s11802-019-3956-9

DOI: 10.1007/s11802-019-3956-9

Copyright statement: Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

License:

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Product

Self URI (journal-page): https://www.springer.com/journal/11802