title: Description of Epistylis riograndensis n.sp. (Ciliophora: Peritrichia) found in an artificial lake in Southern Brazil.
abstract: Epistylis riograndensis n. sp., a freshwater peritrich hosting symbiotic algae in its cytoplasm, was collected from an artificial lake, in a Botanical garden in Southern Brazil. Its detailed morphology was investigated using live and silver-stained specimens. The colonial sessile E. riograndensis has elongate zooids measuring, on average, 162 μm in length and 45 μm in width. A single contractile vacuole located near the infundibulum and a C-shaped macronucleus located transversely in the adoral half of the cell were also observed. The oral infraciliature revealed in silver-stained specimens was typical of peritrich ciliates. Three infundibular polykineties consisting of 3 rows of kinetosomes were observed. Molecular analyses of 18s rDNA placed E. riograndensis among other Epistylis species in the Order Vorticellida.
authors.affiliation: Faculdade de Biociências. Pontifícia Universidade Católica do Rio Grande do Sul,Porto Alegre, Brazil; Email: laura.utz@pucrs.br.
authors.forename: Laura R P
authors.initials: LR
authors.lastname: Utz
authors.affiliation: Faculdade de Biociências. Pontifícia Universidade Católica do Rio Grande do Sul,Porto Alegre, Brazil; Email: unknown.
authors.forename: Ana Carolina Silva Rodrigues
authors.initials: AC
authors.lastname: Farias
authors.affiliation: Faculdade de Biociências. Pontifícia Universidade Católica do Rio Grande do Sul,Porto Alegre, Brazil; Email: unknown.
authors.forename: Eduarda Correa
authors.initials: EC
authors.lastname: Freitas
authors.affiliation: Faculdade de Biociências. Pontifícia Universidade Católica do Rio Grande do Sul,Porto Alegre, Brazil; Email: unknown.
authors.forename: Gabriella Oliveira
authors.initials: GO
authors.lastname: de Araújo
mesh_terms: D001938:Brazil; D016798:Ciliophora / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D004275:DNA, Ribosomal / Q000235:genetics; D017753:Ecosystem; D060106:Lakes / Q000469:parasitology; D010802:Phylogeny
chemical_list: D004275:DNA, Ribosomal