Redescriptions of the holotypes of Mygalarachnae [sic] Ausserer 1871 and Harpaxictis Simon (1892) (Araneae: Theraphosidae) with rebuttal of their synonymy with Sericopelma Ausserer 1875 - Gabriel, R.; Longhorn, S. J. (Revista Ibérica de Aracnología, 2011)