Data/hora: 10/06/2024 12:11:01

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Microscopic aspects of electrosensory system on the partially euryhaline lesser guitarfish	
Autores: 	RANGEL,BIANCA S.; WOSNICK,NATASCHA; AMORIM,ALBERTO F.; K. JUNIOR,JOSÉ ROBERTO; RICI,ROSE E.G.	
Data: 	2018-03-01	
Ano: 	2018	
Palavras-chave: 	Elasmobranch; Ampullae of Lorenzini; Electroreceptors; Light microscopy; Scanning electron microscopy.	
Resumo: 	ABSTRACT The electrosensory system on elasmobranchs consists of subcutaneous electroreceptor organs known as ampullae of Lorenzini. The present study investigated the ampullae of Lorenzini morphology of the lesser guitarfish Zapteryx brevirostris, using light microscopy and scanning electron microscopy. The pore number found in the ventral skin surface is much higher than that found in the dorsal portion, characteristic of species that inhabit the euphotic zone. Under light microscopy it was possible to observe that the wall canal consists of a single layer of squamous epithelial cells. The canal features distal expansion, where the ampullae are located with up to six alveoli. The sensory epithelium of ampullae is composed by cubic cells, with oval nucleus, restricted to the interior of the alveoli. With analysis the clusters under scanning electron microscopy, it was possible to observe the structure and the random arrangement of individual ampullae, canals and nerves. The distribution of dorsal and ventral pores and ampullae in Z. brevirostris resembled those of the same family. The number of alveoli per ampullae was similar to that found in euryhaline elasmobranchs species, suggesting that the morphological organization in Z. brevirostris is linked to its possible evolutionary transitory position among batoids.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100037	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201720150889	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.90 n.1 2018	
Fonte: 	info:eu-repo/semantics/openAccess