pterosaur

In 1784, Cosimo Alessandro Collini, curator of the Mannheim cabinet of natural curiosities, published a description of a strange fossil from the Solnhofen limestone of Bavaria. He could not identify the animal and thought the long bony projection might be a flipper for swimming. It was Georges Cuvier in Paris who, reading Collini's plates in 1801, recognized the creature as a flying reptile and coined the French term ptéro-dactyle, from Greek words for wing and finger.

Cuvier reached for Greek because Greek described shapes precisely. Pteron had meant wing since Homer, and dactylos meant finger; the creature's wing was a membrane stretched along one enormously elongated fourth finger. The formal Latin name Pterodactylus appeared in Cuvier's 1809 monograph, and Johann Jakob Kaup established the broader order Pterosauria in 1834, from which the everyday English word pterosaur descends.

Sauros in Greek meant lizard. Cuvier's pairing of wing and lizard captured something real: these were reptiles, not birds or bats, and their membrane wings had no feathers. Over the 19th century, dozens of genera received names using the ptero- prefix: Pteranodon (winged and toothless), Pterodaustro (southern wing), each a compressed Greek description of what the fossil showed.

The Pterosauria appeared in the Triassic period roughly 228 million years ago and vanished at the end-Cretaceous extinction 66 million years ago. They ranged from crow-sized Nemicolopterus to Quetzalcoatlus, with a wingspan of eleven meters. No single word captures their 162-million-year reign, but pterosaur carries Cuvier's original surprise: a lizard that flew, named in Greek, first identified by a curator who did not know what he had found.