Question: The work of the scientist credited with the discovery of what he called "chiasmatypie" was continued by what American scientist? 
Sentence (from "Frans Alfons Janssens"): In 1896, he became a professor at the Faculty of Sciences for the Catholic University of Leuven, as a chair in microscopy and later in cytology, succeeding Jean-Baptiste Carnoy in the chair.
Relevant evidence: No