Microscopy and classification of barbels of silver catfish Rhamdia quelen, Siluriformes, Pimelodidae

André Luiz Veiga Conrado, Iuri Moraes Neyrão, Renata Stecca Iunes, Carlos Eduardo Malavasi Bruno, Paulo Rodinei Soares Lopes

Resumo


The barbels of teleost fishes belonging to the orders Siluriformes and Cypriniformes can be classified according to the presence of taste buds, axial rod and striated muscles. Thus, the goal was to describe and classify the microarchitecture of barbels of the silver catfish Rhamdia quelen. The mandibular and maxillary barbels of five juveniles were analyzed using HE, Masson’s trichrome and orcein staining. There was difference in the number of cell layers at the rostral and caudal stratified squamous epithelium; with the presence of taste buds, mucous and club cells. Dermis was composed of connective tissue, nerve bundles, melanophores and vessels. All the structure was supported by an axial rod of elastic cartilage. Thus, silver catfish barbels can be classified in group 2B, along with fishes of the families Clariidae and Ictaluridae.


Palavras-chave


Morphology, Histology, Classification, South American fish, Sensory organs, Taste buds

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DOI: http://dx.doi.org/10.26843/investigacaov1812019p%25p