Preservação Excepcional de Biomateriais Não Mineralizados em Fósseis do Clado Avialae

Authors

DOI:

https://doi.org/10.11137/1982-3908_2021_44_37908

Keywords:

Aves fósseis, Paleontologia Molecular, Moléculas orgânicas

Abstract

Milhares de fósseis de aves primitivas e diversificadasda Era Mesozoica e Cenozoica têm sido descobertos ao redor do mundo. Destes, centenas de estudos encontraram preservação excepcional de biomateriais mineralizados, permitindo ampliar o conhecimento acerca da sua ecologia e evolução. Porém, o clado Avialae apresenta dados escassos a respeito de achados de biomateriais não mineralizados e os que já foram identificados estão dispersos na literatura, associando a ideia das descobertas a fenômenos isolados. Este trabalho apresenta uma revisão da literatura publicada nas últimas duas décadas, com o fim de compreender melhor a frequência dos achados de biomateriais não mineralizados em fósseis do clado Avialae. Os resultados identificaram 12 artigos descrevendo biocomponentes originais para representantes de Anchiornithinae, Confuciusornithidae, Enantiornithes e Euornithes. Destes, as moléculas de proteínas (50%) e melaninas (41,7%) apresentaram maior frequência de achados. Em geral, embora os dados para os grupos não se mostrem taxonomicamente abrangentes, houve ampla distribuição geográfica no globo relativa a bioquímicos originais nas rochas mesozoicas e cenozoicas. No entanto, acredita-se que a frequência é subnotificada e, a partirdo surgimento de novas tecnologias, a previsão é de que maior quantidade de biomateriais orgânicos seja identificada nos fósseis.

Author Biographies

Everton Fernando Alves, Universidade Estadual de Maringá (UEM)

Mestre em Ciências (Imunogenética) pela Universidade Estadual de Maringá (UEM). Especialização em Biotecnologia genômica pela UEM. Especialização em Paleontologia e Cultura pela Faculdade Futura, São Paulo. Treinamento em Paleontologia pelo Centro de Pesquisas Paleontológicas Llewellyn Ivor Price da Universidade Federal do Triângulo MIneiro (UFMT).

Marcio Fraiberg Machado, Faculdade Adventista Paranaense (FAP/IAP)

Doutor em Educação - Ciências e matemática - PUC/RS

Especialista em Biotecnologia pela Universidade Federal de Lavras - MG

Professor do Departamento de Educação, Faculdade Adventista Paranaense, Ivatuba, Paraná

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Published

2021-06-11

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Section

Geology