title: Morphology and morphogenesis of Epistylis plicatilis ehrenberg, 1831 (Ciliophora, Peritrichia) from Wuhan, China.
abstract: A limnetic peritrichous ciliate, Epistylis plicatilis Ehrenberg, 1831, was collected from a freshwater ditch beside Moshan Hill, Wuhan, China. Its morphology, infraciliature, and morphogenesis were investigated based on specimens examined in vivo, following staining with protargol and by scanning electron microscopy. The characteristics of the Wuhan population of E. plicatilis are as follows: 1) colonial, each colony typically comprising 30-50 individuals, with a dichotomously branched, noncontractile stalk; 2) fully expanded zooids measure 90-155 × 30-50 µm in vivo; 3) a series of 6 or 7 conspicuous folds appear in the posterior region of the zooid when it contracts; 4) single horseshoe-shaped macronucleus oriented transversely; 5) single contractile vacuole located in peristomial region on dorsal wall of infundibulum; 6) myoneme system comprises 20-24 longitudinal fibers, peristomial disk fibers as a wreath-like net and peristomial ring fibers; 7) narrowly spaced transverse striations on the surface of the body; 8) infundibular polykineties 1 and 2 are three-rowed, infundibular polykinety 3 is two-rowed; and 9) stomatogenesis is of the buccokinetal type; in the new oral apparatus, infundibular polykineties 2 and 3, the haplokinety, and the germinal kinety all originate from the germinal kinety of the parental oral apparatus whereas the polykinety and infundibular polykinety 1 originate from the parental haplokinety. An improved diagnosis of E. plicatilis is supplied.
authors.affiliation: Hangzhou Key Laboratory for Animal Sciences and Technology, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Laboratory of Protozoology, Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China.
authors.forename: Xinlu
authors.initials: X
authors.lastname: Shi
authors.forename: Qingjuan
authors.initials: Q
authors.lastname: Meng
authors.forename: Guijie
authors.initials: G
authors.lastname: Liu
authors.forename: Guilan
authors.initials: G
authors.lastname: Qi
authors.forename: Chuanqi
authors.initials: C
authors.lastname: Jiang
authors.forename: Xiangwei
authors.initials: X
authors.lastname: Meng
authors.forename: Alan
authors.initials: A
authors.lastname: Warren
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000502:physiology / Q000648:ultrastructure; D048750:Cell Nucleus Division; D002681:China; D002923:Cilia / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D009024:Morphogenesis; D016802:Oligohymenophorea / Q000254:growth & development* / Q000648:ultrastructure
keywords: Epistylis plicatilis; infraciliature; morphology; myoneme system; peritrich; stomatogenesis