2018-08-132018-08-132013-05ROCHA, Thiago L.; SANTOS, Ana P. R.; SABÓIA-MORAIS, Simone M. T. Pseudobrânquia do guaru Poecilia reticulata (Peter, 1859): análise estrutural, morfométrica e histoquímica para detecção de glicoconjugados. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 33, n. 5, p. 669-673, maio 2013.e- 1678-5150http://repositorio.bc.ufg.br/handle/ri/15587The morphology, cytomorphometric parameters, and glycoconjugates present in the pseudo-gill of guppy, Poecilia reticulata Peter, 1859 (Cyprinodontiformes: Poeciliidae), were investigated by light microscopy coupled to image capture and analysis system, and also by lectin histochemistry. The microscopic anatomy indicates that P. reticulata has a glandular pseudo-gill formed by two lobes, located underneath the pharynx epithelium. The organ is formed by vascularized parenchyma rich in pseudo-gill cells. This cell type exhibits active cytophysiological state with an abundant system of biomembranes and lacking of ostium in apical surface, which in turn is found in the mitochondria-rich cells of the holobranch. This indicates that the pseudo-gill cells distinguishe from the holobranch cells in their morphology, histochemistry and physiology. Due to these intrinsic characteristics, the pseudo-gill of guppy fingerlings may have non-respiratory function in the initial phase of their development. The characterization of guppy’s pseudo-gill could facilitate further studies about the effect of water pollutants on biomonitor species, such as P. reticulata.porAcesso AbertoGuaruPoecilia reticulataBrânquiasCélulas do cloroEspécie bioindicadoraGuppyPoecilia reticulataGillsChloride cellsBiomonitor speciesArtigo10.1590/S0100-736X2013000500019