INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
REPORT ON A ??the first THEROPOD NESTING SITE FROM HYOGO, JAPAN
Autor/es:
KOHEI TANAKA; MARIELA S. FERNÁNDEZ; KATSUHIRO KUBOTA; FRANÇOIS THERRIEN; TADAHIRO IKEDA; DARLA K. ZELENITSKY; HARUO SAEGUSA
Lugar:
Albuquerquer
Reunión:
Congreso; SVP 2018 78th Annual Meeting; 2018
Institución organizadora:
Society of Vertebrate Paleontology
Resumen:
Fossil sites that preserve the remains of dinosaur eggs are extremely rare in Japan. The richest egg site known is from the Kamitaki locality in the eastern Hyogo Prefecture of southwestern Japan, where exposes the Lower Cretaceous (Albian) Ohyamashimo Formation. The Kamitaki locality has produced over 90 eggshell fragments from a bonebed layer containing skeletal elements of various dinosaurs (e.g., basal hadrosaurid, ankylosaur, titanosauriform sauropod, tyrannosauroid, therizinosauroid, and indeterminate theropod). Although previous discoveries of egg remains at the site were limited to tiny eggshell fragments (i.e., one ornithopod and four theropod ootaxa), we report here on new complete and partial eggs discovered in mudstone layers about five meters above the bonebed layer. So far, up to eight nearly complete and partial eggs, as well as dozens of scattered eggshell fragments, have been recovered from this new level. The eggs are small and elongate (estimated size of 5 cm by 2 cm). The eggshell from the eggs and scattered fragments has a smooth external surface, is thin (