2013-10-182013-10-182012-03TESTON, José Augusto; NOVAES, Jessé Bucioli; ALMEIDA JUNIOR, José Otávio Barros. Abundância, composição e diversidade de Arctiinae (Lepidoptera, Arctiidae) em um fragmento de floresta na Amazônia Oriental em Altamira, PA, Brasil. Acta Amazonica, Manaus, v. 42, n. 1, p. 105-114, mar. 2012. DOI: http://dx.doi.org/10.1590/S0044-59672012000100013. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/4392. Acesso em:.1809-4392https://repositorio.ufpa.br/handle/2011/4392This study evaluated the Arctiinae fauna in a fragment of primary forest in Altamira, Pará, Eastern Amazonia, Brazil. The moths were sampled during two years (from August 2007 to July 2009) with a light trap. The following parameters were measured: richness, abundance, constancy, diversity and evenness indices (Shannon H ‘and E') and Brillouin (H and E), and dominance index of Berger-Parker (BP). The richness estimatives were made by nonparametric procedures, Bootstrap, Chao 1, Chao 2, Jackknife 1, Jackknife2 and Michaelis-Mentem. Four hundred and sixty-six individuals of 78 species of Arctiinae were captured, of which twelve are new records for Pará State. Values of parameters analyzed for the entire period were: H ‘= 3.08, E' = 0.708, H = 2.86, E = 0.705, and Sp = 0.294. Communities of the less rainy months were more diverse. Estimators predicted an increase between 17 to 253 in species richness.porAcesso AbertoBiodiversidadeMariposasNoctuoideaRegião neotropicalBiodiversityMoths,Neotropical regionArtigo de Periódicohttp://dx.doi.org/10.1590/S0044-59672012000100013