thumb|upright|Portrait photograph by John Adams Whipple, circa 1865 In 1842 to 1846, Agassiz issued his Nomenclator Zoologicus, a classification list with references of all names used in zoological genera and groups.
thumb|upright|Portrait photograph by John Adams Whipp.le, circa 1865 In 1842 to 1846, Agassiz issued his Nomenclator Zoologicus, a classification list with references of all names used in zoological genera and groups