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Type: Article
Published: 2019-08-29
Page range: 445–456
Abstract views: 55
PDF downloaded: 3

Rediscovery, redescription, and reclassification of the rare and unusual fly Pyrgometopa penicillata Kertész (Diptera: Drosophilidae)

Laboratório de Evolução e Morfologia de Diptera, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 14040–901, Ribeirão Preto, SP, Brazil.
Curator, Division of Invertebrate Zoology; Professor, Gilder Graduate School, American Museum of Natural History, Central Park West at 79th St, New York, NY.
Diptera taxonomy systematics Ephydroidea Steganinae Stegana

Abstract

For slightly more than a century only the type specimen has been known for Pyrgometopa penicillata, a monotypic genus of Drosophilidae whose sole species has an ocellar triangle distended into a bizarre tubercle bearing a tuft of large, spine-like bristles in both sexes. Here we report additional specimens of both sexes of the species, recently rediscovered from Brazil, Peru and French Guyana, allowing us to state that Pyrgometopa is a junior synonym for Stegana, a large cosmopolitan genus. A detailed redescription of Stegana penicillata (Kertész) new combination is provided, including new morphological information, like the male and female terminalia, the egg and a short discussion is provided about its hallmark feature.

 

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