Resumen

SALLES, Frederico Falcão  y  NIETO, Carolina. The adult stages of Nanomis and Spiritiops (Ephemeroptera: Baetidae). Rev. Soc. Entomol. Argent. [online]. 2008, vol.67, n.1-2, pp.35-39. ISSN 0373-5680.

The adult stages of Nanomis Lugo-Ortiz & McCafferty and Spiritiops Lugo-Ortiz & McCafferty are described for the first time based on reared material from Argentina and Brazil, respectively. They can be differentiated from the other adults of Baetidae by the following characters: Nanomis, hind wings with three longitudinal veins, second vein bifurcate; costal projection of the hind wings pointed, placed in the basal third of anterior margin; and forceps threesegmented, third segment rounded. Spiritiops, fore wings with paired and long marginal intercalary veins; hind wings with three complete longitudinal veins, and an incomplete small longitudinal vein; costal projection of hind wings pointed, broad at base and placed in the basal third of anterior margin; forceps threesegmented, second segment constricted and third segment elongate and narrowed.

Palabras clave : Description; Taxonomy; Neotropical Region.

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