 Allosaurus material from Portugal was first reported in 1999 on the basis of <unk> / <unk> , a partial skeleton including a <unk> , vertebrae , ribs , <unk> , chevrons , part of the <unk> , and hindlimbs . This specimen was assigned to A. fragilis , but the subsequent discovery of a partial skull and neck ( ML 415 ) near <unk> , in the Kimmeridgian @-@ age Porto Novo Member of the <unk> Formation , spurred the naming of the new species A. europaeus . It differs from other species of Allosaurus in cranial details . However , more material may show it to be A. fragilis , as originally described . 
