A revision of the Neotropical Solenopsidini ant genus Oxyepoecus Santschi, 1926 (Hymenoptera: Formicidae: Myrmicinae). 2. Final. Key for species and revision of the Rastratus species-group - Albuquerque, Nícolas Lavor de; Brandão, Carlos Roberto Ferreira (Papéis Avulsos de Zoologia, 2009)