Description and molecular phylogeny of Paramecium grohmannae sp. nov. (Ciliophora, Peniculida) from a wastewater treatment plant in Brazil

Authors

  • Thiago da Silva Paiva Laboratory of Evolutionary Protistology, Instituto de Biociências, Universidade de São Paulo. Laboratório de Biologia Molecular “Francisco Mauro Salzano”, Instituto de Ciências Biológicas, Universidade Federal do Pará
  • Bárbara do Nascimento Borges Centro de Tecnologia Agropecuária, Instituto Socioambiental e dos Recursos Hídricos, Universidade Federal Rural da Amazônia
  • Maria Lúcia Harada Laboratório de Biologia Molecular “Francisco Mauro Salzano”, Instituto de Ciências Biológicas, Universidade Federal do Pará
  • Inácio Domingos da Silva-Neto Laboratório de Protistologia, Departamento de Zoologia, Instituto de Biologia, CCS, Universidade Federal do Rio de Janeiro

Abstract

A new morphological species of Paramecium Müller, 1773, was discovered in samples of water with activated sludge of a wastewater treatment plant in Rio de Janeiro, Brazil. It is described based on light microscopy and its phylogenetic position hypothesized from 18S-rDNA analyses. Paramecium grohmannae sp. nov. is characterized by a unique combination of features. It is a counterclockwise rotating freshwater Paramecium with body outline intermediate between “aurelia” and “bursaria” forms, two contractile vacuoles, each with one excretion pore and usually nine collecting canals; oral opening slight below body equator; macronucleus ellipsoid to obovoid, measuring ~64 x 24 μm and located in anterior half of body; one (less frequently two) globular endosomal micronuclei ~5 μm in diameter with endosome ~2.5 μm. Phylogenetic analyses unambiguously place the new species within the P. multimicronucleatum complex.

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Published

2016-11-04

Issue

Vol. 17 No. 1 (2016): Revista Brasileira de Zoociências - Ciliophora

Section

Artigos