andMamenchisaurusstay on the rim of the island along with very small carnivores such asCompsognathus. Interestingly, the structure of this island allows for a very curious arrangement. The island has multiple channels and canyons that cut into its interior all the way from the coast. This allows...
nov. Plu- master ophiuroides was described on the basis of a single specimen showing a well-preserved actinal surface from the Pliensbachian of the Yorkshire coast, UK (Wright 1863, pl. 5 Fig. 1). Gale (this volume) has established the Plumasteridae to accommodate these asteroids which ...
Jurassic-Cretaceous (J-K) ammonoids experienced remarkably rapid rates of evolution and extinction. The processes that fueled this evolutionary volatility are not well understood. Evolutionary relationships among and within the six J-K ammonoid suborders