Dr. Ricardo Valenzuela is a biologist who graduated from the Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, México, with a Master of Science in Biology and a Doctorate of Science in Biology from the Facultad de Ciencias, Universidad Nacional Autónoma de México, México. He worked as a teacher at the UANL from 1980 to 1982 and has been working as a professor and researcher at the Escuela Nacional de Ciencias Biológicas of the Instituto Politécnico Nacional, México, from October 1982 to the present. His main lines of research are (1) the inventory of fungi from various geographic and physiographic regions and types of vegetation in Mexico, (2) the taxonomy and phylogeny of macrofungi, mainly wood decay Ascomycota and Basidiomycota with morphological and molecular biology techniques, and (3) the cultivation of edible and medicinal mushrooms.