Asteriornis maastrichtensis

Quick answer

Holotype. Natuurhistorisch Museum Maastricht (NHMM) 2013 008, a nearly complete, articulated skull including mandibles and associated postcranial remains preserved in four blocks (Fig. 1, Extended Data Figs. 1 – 7; see Supplementary Information for videos, character information, measurements, additional description and discussion). Preserved elements include the premaxillae, maxillae, nasals, frontals, laterosphenoid, basisphenoid, mesethmoid, left quadrate, left jugal, right palatine and lower jaws. Associated postcranial elements include incomplete femora, tibiotarsi, tarsometatarsus and radius. Locality and age. CBR-Romontbos Quarry, Eben-Emael, Liège, Belgium. Valkenburg Member (66.8 – 66.7 million years old 24), Maastricht Formation, Late Maastrichtian, Cretaceous. Additional details regarding the locality and stratigraphic setting are presented in the Supplementary Information.