Gould-Vrba 1982: trait that currently serves a function different from the one for which it was selected. Examples: feathers (thermoregulation → flight); tetrapod limbs (aquatic propulsion → walking).
Gould-Vrba 1982: trait that currently serves a function different from the one for which it was selected. Examples: feathers (thermoregulation → flight); tetrapod limbs (aquatic propulsion → walking).