Anne M. Musser, Michael Archer,
... missing). In this regard the dentary of Ob. insignis seems to be morphologically closer to Or. anatinus than is the dentary of the younger Ob. dicksoni . Phylogenetic conclusions differ from previous analyses in viewing the northern Australian Ob. dicksoni as possibly derived in possessing a hypertrophied bill and dorsoventrally flattened skull and dentary, perhaps being a specialized branch of the Obdurodon line rather than ancestral to species of Ornithorhynchus . ...
Tópico(s): Paleontology and Evolutionary Biology
1998 - Royal Society | Philosophical Transactions of the Royal Society B Biological Sciences