Nature Communications (Dec 2018)
Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils
Abstract
Medullary bone is used by modern female birds as a calcium reservoir for eggshell production. Here, O’Connor and colleagues propose criteria for identifying medullary bone in fossils and report medullary bone from a Cretaceous enantiornithine bird fossil.