Mayr followed up on Dobzhansky's work with the 1942 book Systematics and the Origin of Species, which emphasized the importance of allopatric speciation in the formation of new species.
Mayr continuou os traballos de Dobzhansky cun libro de 1942 titulado Systematics and the Origin of Species, que salientaba a importancia da especiación alopátrica na formación de novas especies.