He first described the species as Pithecanthropus erectus -LRB- `` upright ape-man '' -RRB- , based on a calotte -LRB- skullcap -RRB- and a modern-looking femur found from the bank of the Solo River at LOCATION@1 , in MISC@1 .

MISC@2 anatomist PERSON@1 -LRB- NUMBER@1 -RRB- first described it as Pithecanthropus erectus , based on a skullcap and a modern-looking thighbone found from the bank of the Solo River at LOCATION@1 , in LOCATION@2 .
