An Early Miocene fossil has been named Miopelecanus gracilis on the basis of certain features originally considered unique .
An Early Miocene fossil has been later thought to lie within the range of interspecific variation in Pelecanus .
An Early Miocene fossil has been named Miopelecanus gracilis on the basis of certain features originally considered unique , but later thought to lie within the range of interspecific variation in Pelecanus .