Phylogenetic studies are rare in early Palaeozoic cephalopods. Here, we present the first cladistic analysis of the order Lituitida based on published, as well as some new, material. Three clades are
Morphological responses of non-mammalian herbivores to external ecological drivers have not been quantified over extended timescales. Herbivorous non-avian dinosaurs are an ideal group to test for suc
Outgroup sampling is a central issue in phylogenetic analysis. However, good justification is rarely given for outgroup selection in published analyses. Recent advances in our understanding of archosa