Data/hora: 10/06/2024 16:11:12

Provedor de dados: | 16
País: | Netherlands
Título: | Morphological re-evaluation of the parotoid glands of Bufo ictericus (Amphibia, Anura, Bufonidae)
Autores: | Almeida, P.G. de; Felsemburgh, F.A.; Azevedo, R.A.; Brito-Gitirana, L. de.
Data: | 2007
Ano: | 2007
Palavras-chave: | Morphology; Amphibian integument; Exocrine glands; Bufonid; 42.82; 42.62.
Resumo: | Multicellular glands in the amphibian integument represent a signifi  cant evolutionary advance over those of fi shes. Bufonids have parotoid glands, symmetrically disposed in a post-orbital position.  Their secretion may contribute to protection against predators  and parasites. This study provides a re-evaluation of the morphology  of the Bufo ictericus parotoid glands. The parotoid gland  integument of the medial surface shows rounded depressions  with small pores that connect with the duct openings of the larger  granular glands. Under light microscopic evaluation the integument  is constituted by typical epidermis, supported by dermis  subdivided into a spongious dermis, a reticular dermis, and a  compact dermis. The Eberth-Katschenko layer is identifi ed as a  basophilic material scattered throughout the superfi cial spongious  dermis. The parotoid gland is an integument region, in which  three exocrine glandular types occur: mixed glands, smaller  granular glands and larger granular glands. The mixed gland is  formed by mucous and serous cells while the small granular  glands contain a homogene acidophilic intake. The larger granular  glands produce a basophilic and alcianophilic material, and  are responsible for the macroscopic protuberances designed as  parotoid glands. Thus, the end product released by the parotoid  glands is a mix of secretions produced by the three glands.
Tipo: | Article / Letter to the editor

Identificador:

http://www.repository.naturalis.nl/record/256117

http://www.repository.naturalis.nl/document/54519

Formato: | application/pdf
Fonte: | Contributions to Zoology (1383-4517) vol.76 (2007) nr.3 p.145
Fonte: | (c) Naturalis