Posts Tagged paleoecology
TER-QUA 2011 Proceedings: Jeremy B. Stout. 2012. New Material of Borealosuchus from the Bridger Formation, with Notes on the Paleoecology of Wyoming’s Eocene Crocodylians. – PalArch’s Journal of Vertebrate Palaeontology 9(5) (2012), 1-7. ISSN 1567-2158. 7 pages + 3 figures, 1 table.
Posted by PalArch Editor (AV) in PalArch's Journal of Vertebrate Palaeontology on April 5th, 2012
Abstract The Eocene Green River and Bridger Formations of Wyoming represent lacustrine and fluvial environments noteworthy for an extremely diverse crocodylian fauna (at least eight species in seven genera). This paper discusses a fragmentary crocodylian jaw from the Bridger Formation, and also notes possible ecological partitioning among these sympatric crocodylians. The jaw fragment can be assigned confi dently to Borealosuchus based on the exclusion of the splenial from the mandibular symphysis and the presence of occlusal grooves between the alveoli, and it is referred tentatively to Borealosuchus cf. B. wilsoni. To examine the paleoecology of these crocodylians, variables based on habitat, body size, and inferred diet were formulated and species placed within respective categories. The research found that while there were more sympatric crocodylians in the early to mid Eocene of Wyoming than in any present-day biota, direct interspecifi c competition for resources is presumed to have been relatively low.
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Tor Bertin. 2010. A Catalogue of Material and Review of the Spinosauridae. – PalArch’s Journal of Vertebrate Palaeontology 7 (4): 1-39
Posted by PalArch Editor (AV) in PalArch's Journal of Vertebrate Palaeontology on December 9th, 2010
Abstract Spinosaurids are a monophyletic clade of large-bodied, long-snouted theropod dinosaurs known from minimal skeletal material. In an effort to assist future research on this unusual clade, a catalogue of past spinosaurid discoveries is presented. Database information includes specimen numbers, material identification, locality information, depositional environments, stratigraphic detail, generic or subclade assignment, tooth measurements, tooth placement, and detailed notes on the nature of the finds themselves when needed. Previously reported biogeographic and faunal dispersal patterns suggest that spinosaurids may eventually be found in North American strata, potentially having migrated from western Europe in the Early Cretaceous and eastern Asia over the Beringian isthmus in the Late Cretaceous. This database may be useful for predicting future points of spinosaurid discovery.
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