ACKNOWLEDGMENTS
We would like to thank Louis Taverne (Université libre de Bruxelles), Bruna Burato (Museo Civico di Storia Naturale, Verona), and Susan Kornreich Wolf (Fryxell Geology Museum, Rock Island) for their assistance. Matt Friedman, Jesús Alvaredo-Ortega, and an anonymous reviewer offered valuable comments and suggestions, thus improving the quality of the article. This work was supported by a grant from the INTERRVIE program of the Institut National des Sciences de l’Univers, Centre Nationale de la Recherche Scientifique, and by the Project CGL2009-11838BTE of the Spanish Ministerio de Ciencia e Innovación.
Handling editor: Matt Friedman