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Microscopic aspects of electrosensory system on the partially euryhaline lesser guitarfish Anais da ABC (AABC)
RANGEL,BIANCA S.; WOSNICK,NATASCHA; AMORIM,ALBERTO F.; K. JUNIOR,JOSÉ ROBERTO; RICI,ROSE E.G..
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elasmobranch; Ampullae of Lorenzini; Electroreceptors; Light microscopy; Scanning electron microscopy.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100037
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Histology of juvenile skin of Lepidosiren paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi) Anais da ABC (AABC)
ROMANO,LUIS ALBERTO; LÓPEZ,ANDREA I.H.; BUITRAGO,JUAN RAFAEL; PEDROSA,VIRGÍNIA F..
Abstract: The skin of three juvenile Lepidosiren paradoxa specimens was examined. The epidermis was composed of a polystratified epithelium resting on a basement membrane, including mucus-secreting cells, and a cuticle of mucopolysaccharides on the surface. Two types of skin receptors, electroreceptors and mechanoreceptors, were found; the first type was located in the dermoepidermal junction, and the second type was completely intraepiderma. The skin structure of these fish, suggests the possibility of the skin participating in the breath.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electroreceptors; Lungfish; Mechanoreceptors; Paraná River basin; Pirambóia.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700864
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