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On the identities of Rhinoleucophenga pallida Hendel and Rhinoleucophenga obesa (Loew) (Diptera, Drosophilidae), with description of a new sibling species from Brazil

Abstract

Rhinoleucophenga pallidaHendel, 1917Hendel, F., 1917. Beitrage zur Kenntnis der acalyptraten Musciden. Dtsch. Entomol. Z. 1917, 33-47. (type species of the genus) is redescribed based on its female holotype and a male from a nearby locality, and Rhinoleucophenga obesa (Loew, 1872Loew, H., 1872. Diptera Americae septentrionalis indigena Centuria decima. Berl. Entomol. Z. 16, 49-124.) on its two syntypes, which are designated as the male lectotype and a female paralectotype. Both are valid species. A proposal is made to establish the genus Pseudophortica Sturtevant, 1918 (type species R. obesa), a junior synonym of Rhinoleucophenga, to subgenus rank and include all species of Rhinoleucophenga described or redescribed from males except R. pallida, which is unique in having a remarkable pedunculate surstylus, among other differences. The North American R. obesa is compared to its closest sibling, the South American species Rhinoleucophenga gigantea (Thomson, 1869Thomson, C.G., 1869. Diptera species novas descripsit. In: Kongliga Svenska Fregatten Eugenies Resa Omkring Jorden. Vetenskapliga Iakttagelser, andra delen, Zoologi, 1. Insecta. plate ix. Norstedt and Soner, Stockholm, pp. 443-614.). The occurrence of R. obesa in Brazil is also questioned, as suggested long ago by Marshall R. Wheeler. The specimens from Brazil previously identified as such most probably belong to the new species described in the present paper as Rhinoleucophenga (Pseudophortica) cantareira sp. nov. (type locality: Parque Estadual da Cantareira, City of São Paulo, State of São Paulo, Brazil). Numerous photomicrographs of their habitus and male terminalia taken with a Smartphone's rear camera and digitally stacked to create images with greater depth of focus are provided.

Keywords
Habitus; Illustrations; Lectotype designation; Steganinae; Terminalia

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