ABSTRACT
ABSTRACT Stegana (Orthostegana) acutangula (Hendel) from Bolivia and Stegana (Steganina) triseta (Duda) from Costa Rica are redescribed based on type specimens, and their identities clarified. A single syntype male of the first species (type species of the subgenus Orthostegana) is designated as a lectotype and one male out of the four Costa Rican syntypes (3 males, 1 female) of the latter species was selected as a lectotype of the Steganina subgenus. The other three (2 males, 1 female) specimens were designated as paralectotypes. All four males were dissected and their terminalia were photomicrographed. The two male Stegana triseta paralectotypes proved to belong to two unknown species closely related to Stegana acutangula, described here as Stegana dudai sp. nov. and Stegana turrialba sp. nov., and another male specimen, collected at Parque Nacional Yasuní, provinces of Napo/Orellana, Ecuador, is described as Stegana yasuni sp. nov. Additionally, we have included photomicrographs of the habitus of the type specimens as well as of some nontype specimens from Peru and Costa Rica. Based on the descriptions herein we not only clarified the status of these five species but also propose including all of them in the subgenus Orthostegana.
ABSTRACT
Abstract Two conspicuous Steganinae species, Stegana (Steganina) magnifica Hendel, 1913 from Amazonian Peru and Stegana (Ceratostylus) fumipennis (Enderlein, 1922) from southern Brazil, are redescribed based on holotypes, and their identities are clarified. Both species are exclusive to the Neotropical Region and the first, with a body length of about 5.5 mm, is the largest species of Stegana described so far in this region, while the latter displays a peculiar antenna bearing an unusual, forward-projected, comma-shaped flagellomere 1. The photomicrographs of the habitus and terminalia of each specimen are also provided.