They include : dorsal rib fragments ( GSI K20 / 326, K27 / 425 ); a caudal vertebra ( GSI K20 / 317 ), four chevrons ( GSI K27 / 492 494, 496 ), the left and right scapula ( only a cast still extant ); a sternal plate ( GSI K20 / 647 ); a humerus ( lacking an inventory number ), a radius ( GSI K27 / 490 ) and an ulna ( GSI K27 / 491 ).