Ringuelet held several professorships at the Universidad Nacional de La Plata : Adjunct professor of general Zoology ( 1944 1948 ), Acting Professor ( 1946 1947 ) and Head ( 1947 1955 ) Invertebrate Zoology, Professor Acting Zoogeography ( 1958 ), Vertebrate Zoology Professor ( 1957 1966 ), Professor of Ecology and Zoogeography ( 1960, per vitam in 1972 ) and Professor of Limnology ( 1969 1978 ).
