The evidence from the site indicates that possible influences from Mesoamerica, e . g . the ball game, are in evidence in Puerto Rico as early as 700 A . D . The presence of shell middens and refuse heaps at the site will afford an opportunity to study subsistence patterns as well as possibly some information on the paleoenvironment.
32.
Like other early small mammals it is known only from fossilized teeth since the rest of the body did not fossilize as efficiently . " Docodon " fossils are found most commonly in the Black Hills region of South Dakota and the paleoenvironment of the genus suggests that it likely inhabited woodland and stayed in trees out of the reach of predators.
33.
Dr . Carol Mandryk, a Harvard University archeologist who has studied the American paleoenvironment, said the concept of an ice-free corridor as the migration route emerged in the 1930s, but her research shows that even after the ice sheets began to open a path, there was not enough vegetation there to support the large animals migrating people would have had to depend on for food.
34.
Predators in this paleoenvironment included the theropods " Torvosaurus ", " Ceratosaurus ", " Marshosaurus ", " Stokesosaurus ", " Ornitholestes ", and " Allosaurus ", which accounted for 70 to 75 % of theropod specimens and was at the top trophic level of the Morrison horsetails, cycads, ginkgoes, and several families of conifers.
35.
Predators in this paleoenvironment included the theropods " Saurophaganax ", " Torvosaurus ", " Ceratosaurus ", " Marshosaurus ", " Stokesosaurus ", " Ornitholestes " and " Allosaurus ", which accounting for 70 to 75 % of theropod specimens and was at the top trophic level of the Morrison horsetails, cycads, ginkgoes, and several families of conifers.
36.
Zeresenay then moved back to Ethiopia, and it was the next year, 1999, while working as a research associate at the National Museum of Ethiopia and the French Center for Ethiopian Studies in Addis Ababa, Ethiopia, that he formed the Dikika Research Project ( DRP ), the first Ethiopian-led paleoanthropological field research project, whose ongoing multi-national and multi-disciplinary mission is aimed at recovering data addressing Zeresenay s primary research interests : hominin evolution and the ways by which that evolution was influenced by the paleoenvironment.
