title: Redescription of two little-known urostyloid ciliates, Anteholosticharandani (Grolière, 1975) Berger, 2003 and A. antecirrata Berger, 2006 (Ciliophora, Urostylida).
abstract: The morphology of two little-known urostyloid ciliates, Anteholosticha randani (Grolière, 1975) Berger, 2003 and A. antecirrataBerger, 2006, collected from freshwater biotopes in southern China, was studied based on live observations and protargol staining. Anteholosticha randani is characterized by its bipartite adoral zone and short, longitudinally aligned undulating membranes. One early stage of reorganization/morphogenesis, one early-middle stage of reorganization and one middle stage of morphogenesis are also reported. Anteholosticha antecirrata is characterized by its large body size in vivo (200-400 × 40-80 μm), a row of buccal cirri and conspicuous, yellow-green cortical granules. Phylogenetic analyses based on SSU rDNA sequence data reveal that A. antecirrata may share a most recent common ancestor with Urostyla grandis and Bakuella granulifera, whereas A. randani branches independently and is sister to a large clade that includes Pseudourostyla, Pseudokeronopsis, Caudiholosticha and several species of Anteholosticha.
authors.affiliation: School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China; Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
authors.forename: Yangbo
authors.initials: Y
authors.lastname: Fan
authors.affiliation: Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
authors.forename: Xiaoteng
authors.initials: X
authors.lastname: Lu
authors.affiliation: Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
authors.affiliation: Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China. Electronic address: xiaozhonghu@ouc.edu.cn.
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Hu
authors.affiliation: Department of Life Sciences, Natural History Museum, London SW7 5BD, UK.
authors.forename: Alan
authors.initials: A
authors.lastname: Warren
mesh_terms: D002681:China; D016798:Ciliophora / Q000145:classification* / Q000166:cytology* / Q000235:genetics; D005618:Fresh Water / Q000469:parasitology; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D013045:Species Specificity
chemical_list: D012337:RNA, Ribosomal, 18S
keywords: Anteholosticha; Morphology; SSU rDNA phylogeny; Southern China; Urostyloid ciliates