ACKNOWLEDGMENTS
We deeply thank M. Palmero for her splendid drawing and M. Antón for his illustration of Tethytragus langai. We are indebted to our colleague I. Casanovas-Vilar for kindly providing the geological map of the Vallès-Penedès. Also, we are grateful to JVP referees and B. Van Valkenburgh (editor) for their helpful comments that enhanced the quality of the original manuscript. The Spanish Ministerio de Ciencia e Innovación supported this study by means of projects CGL2010-21672, CGL2010-19116, CGL2011-28681, and CGL2011-27343, and contracts JCI-2011-11697 to D.DM, CSIC JAE-Doc to I.M.S., and RYC-2009-04533 to D.M.A. The study is also part of the research project 2009 SGR 754 GRC (Generalitat de Catalunya). Field work at ACM was funded by CESPA Gestión de Residuos, S.A.U.
Handling editor: Blaire Van Valkenburgh