Martin D. Brazeau
PER
Martin D. Brazeau Brazeau
Martin D. Brazeau and Per E. Ahlberg are the researchers from Uppsala University, base their claim on a study of a fossil of Panderichthys, a 370-million-year-old fish that is an immediate ancestor of the most primitive tetrapods. Mr. Brazeau said that the first thing that happens is that the spiracle becomes very large. He said that it's got this combination of fish- and tetrapod-like features. He is the one who undertook the research as part of his work on a doctorate in evolutionary biology. In Panderichthys, Mr. Brazeau said that the first thing that happens is that the spiracle becomes very large. Further he said, including changes to a bone that is the forerunner of the stapes, or stirrup bone, that is part of the middle ear structure.