The Role of Modularity in the Evolution of Primate Postcanine Dental Formula: Integrating Jaw Space With Patterns of Dentition

Autor(es)

Ribeiro, Mariana M. ^[1] ; de Andrade, Simone C. ^[1] ; de Souza, Ana Paula ^[1] ; Line, Sergio R. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Morphol, BR-13414900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; v. 296, n. 4, p. 622-629, APR 2013.
• Citações Web of Science: 2

Resumo

The assembly of a phenotype into modules or developmental fields, which are semiautonomous units in development and function, seems to be one of the strategies to increase the capacity to produce phenotypic variation. In mammals the upper dentition is formed on two distinct developmental units, wherein incisors are formed on the primary palate, which is derived from the embryonic frontonasal process, and the other teeth (canine, premolar, and molar) are formed on the alveolar bone, which is derived from the maxillary process (termed herein as PALATE2). The aim of the present work was to analyze the variations in size and number of premolar and molar teeth in primate dentition and to correlate these morphometrical parameters with the relative size of these tooth classes with respect to PALATE2. Furthermore, we seek to understand to what extent the changes in the relative size of premolar and molar fields can influence the size of each tooth within its respective field, and how these parameters connect with the variations in the dental formula that occurred during primate evolution. The data presented here not only indicate that premolar and molar fields can be seen as submodules of a larger and hierarchically superior module (i.e., PALATE2) but also present quantitative parameters that allow us to understand how variations in the relative size of premolar and molar teeth connect with the variations in the dental formula that occurred during primate evolution. Anat Rec, 296:622629, 2013. (c) 2013 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 04/10994-4 - Defeitos na formação do órgão dental
• Beneficiário: Sergio Roberto Peres Line
• Modalidade de apoio: Auxílio à Pesquisa - Temático