The authors thank Clara Ramírez for help with the literature and Arturo Núñez and Cristina Vega for their assistance in the sampling (ICML-Mazatlán), to Kathy Omura from the Natural History Museum of Los Angeles (CA), for the loan of type material of Dickinson’s specimens. To Ing. Israel Gradilla (Centro de Nanociencias y Nanoestructuras, UNAM) for the SEM images. To SAGARPA for the permission DGOPA. 00978.120209.0457 conferred for the collection of the samples. This research has been partially supported by the project SEP-CONACYT-102239.
Received: 3 March 2010
Revised and accepted: 13 October 2010
Published online: 23 December 2010
Editor: R.W.M. van Soest