A partial fish skull with a nearly complete rostrum, a cup-shaped sclerotic hone, and cycloid scales (UCMP 123170) from the Yaquina Formation (late Oligocene, Oregon) is described and identified as tAglyptorhynchus maxillaris, sp. nov. Unusual features of the rostrum include a fused premaxillary segment with a low dorsal keel, and a maxilla with both a flat flange on its postero-ventral margin ...

The fossil record of Red Sea fringing reefs provides an opportunity to study the history of coral-reef survival and recovery in the context of extreme environmental change. The Middle Pleistocene, the Late Pleistocene, and modern reefs represent three periods of reef growth separated by glacial low stands during which conditions became difficult for symbiotic reef fauna. Coral diversity and pal...

We examined the use of dC, TOC and C/N geochemistry of sedimentary organic matter to reconstruct former sea levels and paleoenvironments in the absence of suitable microfossil data. The modern distribution of dC, TOC and C/N of 33 vegetation and 74 surface sediment samples collected from four coastal wetlands in the Thames Estuary and Norfolk, UK are described. The dC, TOC and C/N geochemistry ...

Abstract Amphistegina are common larger benthic foraminifer in coral reefs, with a nearly circumtropical distribution, and major contributors to the CaCO 3 budget of shallow marine environments. The family Amphisteginidae is dominant Cenozoic carbonates. However, its potential as proxy for paleoclimate reconstruction has not been completely explored. intratest variability trace elements lessoni...

—It has been suggested that Nearctic pikas (Ochotona spp.) are good biogeographic indicators of regions containing rocky, mesic, and cool habitat characterized by long winters and short summers. I examined whether populations of pikas inhabiting distinct low-elevation locales (121–255 m) are faithfully restricted to long-winter and shortsummer conditions by monitoring the climate associated wit...

Several recent studies have stressed the role of dietary change in the origin and early evolution of our genus in Africa. Resulting models have been based on nutrition research and analogy to living peoples and nonhuman primates or on archeological and paleoenvironmental evidence. Here we evaluate these models in the context of the hominin fossil record. Inference of diet from fossils is hamper...

Coal seams preserve continuous and high-resolution records of paleoenvironments wildfire events during peat accumulation. In order to elucidate characteristics terrestrial climate changes the time accumulation, petrographic coals in Lower Cretaceous Yimin Formation (Albian) Jiuqiao Sag, Hailar Basin, NE China were studied. petrology analysis shows that studied coal are characterized by dominant...