Acknowledgements
This paper forms part of the first author’s PhD thesis, a study that was funded through a grant from the Consejo Nacional de Ciencia y Tecnología, Mexico. We are grateful to the Coordinación de la Investigación Científica of Universidad Michoacana de San Nicolás de Hidalgo for the support for field work; to Lizbeth Gaona Escamilla and M.C. José Guadalupe Baldazo Monsivaiz for collecting and donating most specimens of the new species; to Dr. Rolando Teruel for the thorough review of the manuscript, the English translation of the final draft, and his valuable and helpful comments. We are grateful to Dr. Oscar F.Francke for his valuable comments and Dr. Robert W. Jones for the review of the English final manuscript.