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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ontogenetic development of the oral apparatus and oropharyngeal cavity in bullfrog tadpoles (Lithobates catesbeianus, Shaw 1802)

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Author(s):
Okada Nakaghi, Laura Satiko [1] ; Lobato Oliveira-Bahia, Veronica Regina [2] ; De Stefani, Marta Verardino [3] ; Pizauro, Joao Martins [4] ; Khan, Kifayat Ullah [3] ; Macente, Beatrice Ingrid [5] ; Menegasso Mansano, Cleber Fernando [5]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ UNESP, Dept Anim Morphol & Physiol, Fac Agr & Vet Sci, Via Acesso Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[2] Fed Univ Para, Inst Biol Sci, Ave Augusto Correa 1, BR-66075110 Belem, Para - Brazil
[3] Sao Paulo State Univ Unesp, Aquaculture Ctr, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[4] Sao Paulo State Univ UNESP, Dept Technol, Fac Agr & Vet Sci, Via Acesso Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[5] Brazil Univ, Campus Fernandopolis Est Projetada F-1 S-N, BR-15600000 Fernandopolis, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: ARCHIVES OF ORAL BIOLOGY; v. 100, p. 69-74, APR 2019.
Web of Science Citations: 0
Abstract

Objective: The present study aimed to describe the morphology of oral apparatus and oral cavity of bullfrog tadpoles during their development and metamorphosis. Design: The oral apparatus and oropharyngeal cavity of tadpoles from hatching up to metamorphosis stage was dissected for further analysis. These structures were fixed in Karnovsky solution, afterwards in osmium tetroxide and metalized in palladium gold and electron-micrographed using the scanning electron microscope. Results: The development of oral apparatus started with the formation and keratinization of the jaw sheaths and labial teeth followed by the formation of marginal and sub-marginal papillae. Degeneration of oral apparatus and formation of mouth was observed during metamorphosis. From stage-42 (metamorphic climax) to stage-43, the jaw sheath and labial tooth rows were disappeared progressively while the size and number of labial papillae were decreased. At stage-44, mouth formation started with the development of anterior and posterior labium though the labial papillae were still present. At stage-45 and 46, mouth was already formed, being very similar to the adult and characterized by the progressive increase in size. Conclusion: The sequence of events that happen during the development of oral apparatus of Lithobates catesbeianus Shaw, 1802 tadpoles follows the same pattern as occur in other anuran species but metamorphic atrophy of the oral apparatus follows the sequence of morphogenesis. (AU)