The taxonomy, geographic distribution, and paleoenvironmental context of azhdarchid pterosaurs are
reviewed. All purported pteranodontid, tapejarid, and azhdarchid specimens from the Cenomanian Kem
Kem beds of Morocco are referred to a single azhdarchid taxon, Alanqa saharica. The four proposed
autapomorphies of Eurazhdarcho langendorfensis from the lower Maastrichtian Sebeş Formation of Romania
are based on misinterpretations of material and this taxon is likely a subjective junior synonym of
Hatzegopteryx thambema. Among 54 currently reported azhdarchid occurrences (51 skeletal remains and 3
tracks) 13% are from lacustrine deposits, 17% from fluvial plain deposits, 17% from coastal plain deposits,
18% from estuarine and lagoonal deposits, and 35% from costal marine deposits. Azhdarchids likely
inhabited a variety of environments, but were abundant near large lakes and rivers and most common in
nearshore marine paleoenvironments.