title: Description of Opisthonecta matiensis n. sp. (Protozoa, Ciliophora), a new peritrich ciliate from wastewater.
abstract: Opisthonecta matiensis n. sp. was isolated from the inlet water of a wastewater treatment plant near Madrid, Spain, and studied in vivo, with silver methods, and using electronic and indirect immunofluorescence microscopy. This new species shows an amphora-like cell shape and has a size of 45-73 microns (x 58.2) x 25-40 microns (x 31.3). The oral infraciliature is formed by one haplokinety, three polykineties, and a short row of kinetosomes (epistomial membrane). The aboral infraciliature is made up of the trochal band and the scopula. From the trochal band arise three fibrillar systems: oral fibers, aboral fibers, and oblique fibers. The myoneme system is composed of a delicate peristomial ring, longitudinal branched fibers that reach the trochal band and of radial fibers extending from the scopula to the trochal band. The silverline system consists of an average of 147 lines. This new species is separated from other known forms by its smaller size, the presence of one single vacuole, and its higher number of silverlines.
authors.affiliation: Departamento de Microbiologia III, Facultad de Biologia, Universidad Complutense de Madrid, Spain. cereceda@eucmax.sim.ucm.es
authors.forename: M
authors.initials: M
authors.lastname: Martín-Cereceda
authors.forename: S
authors.initials: S
authors.lastname: Serrano
authors.forename: A
authors.initials: A
authors.lastname: Guinea
mesh_terms: D000818:Animals; D019084:Fluorescent Antibody Technique, Indirect; D008855:Microscopy, Electron, Scanning; D016802:Oligohymenophorea / Q000302:isolation & purification / Q000502:physiology / Q000648:ultrastructure; D012722:Sewage / Q000469:parasitology*; D018508:Water Purification
chemical_list: D012722:Sewage