title: Systematics and the origin of species: an introduction.
authors.affiliation: Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, 08854, USA.
authors.forename: Jody
authors.initials: J
authors.lastname: Hey
authors.forename: Walter M
authors.initials: WM
authors.lastname: Fitch
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Ayala
mesh_terms: D000818:Animals; D044822:Biodiversity; D005075:Biological Evolution; D002965:Classification; D023281:Genomics; D013045:Species Specificity