hesperornithid

Definitions

Any extinct avialan in the family Hesperornithidae.

Examples

“Finally, the Volgorod locality, Maastrichtian in age, has yielded two dinosaurs (an indeterminate hesperornithid and a basal theropod) and a few turtles.”

“The arrival of these hesperornithids in more southern waters during the early Campanian may indicate⟳ a cooler climate, closer shores, adaptations to changes in prey, or other factors.”

“2020, Alan Feduccia, Romancing the Birds and Dinosaurs, Universal Publishers (BrownWalker Press⟳), page 83, 9. Cretaceous foot-propelled divers, the hesperornithids, were grouped cladistically with loons (Eocene) and grebes (Miocene) as a clade, which would require⟳ re-evolution of teeth from an edentulous ancestor.”

CEFR level