Parides ascanius, the Fluminense swallowtail, is a species of butterfly in the family Papilionidae. It is endemic to Brazil where it is confined to the municipalities of Atafona (São João da Barra) and Itaguaí.

Description

Parides ascanius has a spatulate tail. The two sexes are similar. The male has on the hindwing a hindmarginal fold, covered with white wool. A broad white band traverses both wings; on the hindwing it is more or less red. The larva is light brown, and bears pointed tubercles on all the segments. A full description is provided by Rothschild, W. and Jordan, K. (1906)

Biology

Parides ascanius larvae are found from October to April, feeding only on Aristolochia macroura in its preferred wetland habitats. Adults fly all year. The favourite flower of the nectar feeding adults is Lantana camara (Verbenaceae)

Taxonomy

Parides ascanius is a member of the ascanius species group The members are

Etymology

It is named in the classical tradition. In Roman mythology Ascanius is a legendary king. The common name, "Fluminense", is the demonym for residents of the state of Rio de Janeiro, Brazil.

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