Ontology highlight
ABSTRACT:
SUBMITTER: Bailleul AM
PROVIDER: S-EPMC6426974 | biostudies-literature | 2019 Mar
REPOSITORIES: biostudies-literature
Bailleul Alida M AM O'Connor Jingmai J Zhang Shukang S Li Zhiheng Z Wang Qiang Q Lamanna Matthew C MC Zhu Xufeng X Zhou Zhonghe Z
Nature communications 20190320 1
Understanding non-crown dinosaur reproduction is hindered by a paucity of directly associated adults with reproductive traces. Here we describe a new enantiornithine, Avimaia schweitzerae gen. et sp. nov., from the Lower Cretaceous Xiagou Formation with an unlaid egg two-dimensionally preserved within the abdominothoracic cavity. Ground-sections reveal abnormal eggshell proportions, and multiple eggshell layers best interpreted as a multi-layered egg resulting from prolonged oviductal retention. ...[more]