|Alternative Title||The study on Oligocene feather fossils in western edge of the Qaidam Basin
|Place of Conferral||兰州
|Other Abstract||The carbon atomic percent values in fossilized feather regions are much higher than that of the corresponding values in rock regions of fossils. Combined with the clear, regular rachises and barb micro-structures of fossil feathers observed under the stereomicroscope, the feather fossils studied should be body fossils feathers.Many oblate structures were observed in dark region of light-dark feather fossil, which are similar to fossilized melanosomes. However, there are no such structures in light regions of the fossil. It shows that the fossil feather near the proximal end should be blackish gray, and close to distal end should be white. The reliability of the deduced feather fossil colors by making use of the melanosomes is higher. And the structural colors should be considered.Compared with living bird, the light-dark fossil feather should be one of primary coverts in wing, which helps to smooth airflow over the wings and also plays a role in sexual display with the color.The atomic percent of carbon element has been measured on different color feathers from living birds in different positions of the feather. The distribution of atomic percent of carbon is homogeneous in different position of the same extant feather, which independent of color or melanosomes of extant feathers.However, the distribution of atomic percent of carbon is unhomogeneous in the melanosomes remain regions of fossil, which depends on the density of melanosomes. So the homogeneity of carbon in the fossil feathers can be used for studying the evolution on the color and flight of birds.|
赵海钧. 柴达木盆地西缘渐新世羽毛化石研究[D]. 兰州. 兰州大学,2015.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.