ABSTRACT
Donn Rosen (1929-1986), curator of ichthyology at the American Museum of Natural History, and British Museum (Natural History) paleoichthyologist and comparative morphologist Colin Patterson (1933-1998), were close colleagues who worked together with some frequency in the 1960s and 1970s. During the height of their collaboration, almost annually either one or the other took a transAtlantic ight to New York or London so they could study specimens, debate ideas or write manuscripts together. They found much to agree on, especially the disruption of traditional teleost classication. Together they wrote several inuential papers, notably two monographs published in the Bulletin of the American Museum of Natural History: one on the structure and relationships of the paracanthopterygian shes (Rosen and Patterson 1969) and another on Mesozoic teleost shes and the theory and practice of classifying fossils (Patterson and Rosen 1977).
