Original: In 1891 , his team discovered a human fossil on the island of Java , Indonesia ; he described the species as Pithecanthropus erectus ( from the Greek ` pithecos , '' ape '' , and ` anthropos , '' man '' ) , based on a calotte ( skullcap ) and a femur like that of H. sapiens found from the bank of the Solo River at Trinil , in East Java .
Simplified: Dutch anatomist Eugene Dubois ( 1890s ) first described it as Pithecanthropus erectus , based on a skullcap and a modern-looking found from the bank of the Solo River at Trinil , in Java .