Morphological Redescription and Morphogenesis of Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999 (Ciliophora, Hypotrichida)
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RIS BIB ENDNOTEMorphological Redescription and Morphogenesis of Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999 (Ciliophora, Hypotrichida)
Publication date: 15.05.2011
Acta Protozoologica, 2011, Volume 50, Issue 3, pp. 163 - 174
https://doi.org/10.4467/16890027AP.11.018.0018Authors
Morphological Redescription and Morphogenesis of Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999 (Ciliophora, Hypotrichida)
The morphology and morphogenesis of the hypotrich ciliate Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999, collected from a puddle in Harbin, China, were investigated using live observation and protargol impregnation. Based on previous and present studies, an improved diagnosis of U. macrostyla is supplied. It differs from its congeners mainly by the body shape, no cortical granules and number of macronuclear nodules. The ontogenesis of U. macrostyla is typical for species with such a somatic ciliary pattern: the oral primordium develops hypoapokinetally and FVT-anlagen develop in 5-streaks and primary mode. However, a unique characteristic in morphogenetic process is reported: anlagen for both the left and right marginal cirri occur de novo to the right of the parental structure which has never been seen in other oxytrichids. This characteristic was considered an apomorphy (Berger 1999). This indicates that U. macrostyla possibly has a high phylogenetic position within the genus Urosoma, or perhaps it represents a distinct subgenus.
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Information: Acta Protozoologica, 2011, Volume 50, Issue 3, pp. 163 - 174
Article type: Original article
Department of Biology, Harbin Normal University, Harbin, China; Tianjin Baodi No.1 Middle School, Tianjin, China
Department of Biology, Harbin Normal University, Harbin, China
The Key Laboratory of Biomedical Information Engineering, Ministry of Education, Department of Biology and Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China
Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
Department of Zoology, Natural History Museum, Cromwell Road, London, UK
Laboratory of Protozoology, Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou, China
Published at: 15.05.2011
Article status: Open
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