Alejandra Martinez-Melo. UMR 7207, Centre de recherche en Paléontologie- Paris, Museum National d’Histoire Naturelle. 8 rue Buffon, CP 38, 75005 Paris, France.
Alejandra Martinez-Melo graduated as a Biologist at the Facultad de Ciencias, Universidad Nacional Autónoma de México; with a Master and a PhD in Marine Biology from the same university. Currently she is a postdoctoral fellow at the Centre de Recherche en Paléontologie UMR 7207, Université Pierre et Marie Curie, Sorbonne Université ; her research is focused on 1) the paleodiversity of echinoids from Mexico, and 2) the phylogeny project on basal Spatangoids. She is also interested in the curation of scientific collections and their databases as a tool for paleontologic research.
Jesus Alvarado-Ortega. Departamento de Paleontología, Instituto de Geología, Universidad Nacional Autónoma de México. Ciudad Universitaria. C.P. 04510, Ciudad de México, México.
Born in 1966 in the city of Zacatecas. In 1998, I got the Bachelors degree (Biology) in the Sciences Faculty at Universidad Nacional Autónoma de México (UNAM). In 2005, I got my Doctoral degree in the Geological Institute (IGM), UNAM. During 2005-2007, I had a Postdoctoral position in the Biological Institute at Universidade do Estado do Rio de Janeiro, Brazil. Always I worked on Mexican fossil fishes under my advisor and friend Dr. Shelton P. Applegate. Since 2007, I’m in charge of the Tlayúa project as full-time Researcher at IGM, UNAM. The main interest of my work is focused on the taxonomical characterization of Mexican fossil vertebrates and the understood of phylogenetic and biogeographic patterns and process outlined by these fossils.