Dinosaur Faunas

Dinosaurs began as minor components of Late Triassic large-tetrapod faunas (cf. Parrish, 1993 Rogers et al., 1993), but by the beginning of the Jurassic Period had become the dominant terrestrial large vertebrates. Over the remainder of the Mesozoic Era the taxonomic composition of herbivorous and carnivorous species in dinosaur faunas varied across time and space, but two particularly noteworthy faunal suites can be recognized. One of these has the herbivorous dinosaur component...

Dinosaur Predatorprey Interactions

Theropod food preferences and the intensity of predation. Because predation by and on dinosaurs often resulted in the destruction of prey items, it is difficult to quantify the food preferences of theropods, or to assess the intensity of their predation on herbivorous dinosaurs, in the way that can sometimes be done for marine invertebrates (e.g., by determining the relative frequency of drilled bivalve or brachiopod shells). However, some inferences can be made by examining bite marks and...

Nondinosaurian Predators On Dinosaurs

Dinosaurs originated in the Late Triassic Heckert and Lucas, 1998 Hunt et al., 1998 , and started out as modest-sized animals compared with many of their non-dinosaurian neighbors it is very likely that Triassic dinosaurs frequently fell prey to or were scavenged by large phytosaurs and FIGURE 2 Portion of the fibula of an herbivorous dinosaur Museum of the Rockies 549, Hypacrosaurus , with a theropod tooth embedded in it arrow . The exposed portion of the tooth is about 5 mm long. FIGURE 2...