Immature stages and natural history of two species of <i>Forsterinaria</i> from southeastern Brazil (Lepidoptera: Nymphalidae)


  • André V. L. Freitas
  • Junia Y. O. Carreira
  • Jessie P. Santos
  • Eduardo P. Barbosa


Atlantic Forest, Euptychiina, <i>Forsterinaria quantius</i>, <i>Forsterinaria necys</i>, population biology


The present paper describes the immature stages and provides data on the population biology of the Neotropical satyrines Forsterinaria quantius and Forsterinaria necys (Lepidoptera: Nymphalidae). Eggs of F. quantius are emerald green and laid singly; those of F. necys are bright yellow and oviposition is unknown. In both species, larvae feed on bamboo and pass through four instars. Both species present a predominantly brown pupa, short and smooth, without projections and head horns. Adults presented two peaks of abundance (from April to May and from August to September), and the sex ratio is male-biased in both species. In general, the immature stages of both species are very similar to those of Forsterinaria pronophila, the only other species in the genus with known immature stages. Data on immature stages of any additional species of Forsterinaria would be extremely important to increase our understanding of morphological variation among the immature stages within the genus

O presente trabalho descreve os estágios imaturos e apresenta dados de biologia populacional dos satiríneos Neotropicais Forsterinaria quantius e Forsterinaria necys (Lepidoptera: Nymphalidae). Os ovos de F. quantius são verde esmeralda e colocados isoladamente; os de F. necys são amarelo brilhante e a oviposição não foi observada. As larvas de ambas as espécies se alimentam de bambu e passam por quatro ínstares. As pupas das duas espécies são predominantemente marrons, curtas e lisas, sem projeções ou espinhos. Os adultos apresentaram dois picos de abundância (de abril a maio e de agosto a setembro), e a razão sexual foi desviada para excesso de machos nas duas espécies. Em geral, os estágios imaturos de ambas as espécies são muito similares aos de Forsterinaria pronophila, a única outra espécie no gênero com estágios imaturos conhecidos. Dados de estágios imaturos de quaisquer outras espécies de Forsterinaria seriam de extrema importância para uma melhor compreensão dos padrões morfológicos dentro do gênero.


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