In 1996, Graham Budd found what he considered evidence of short, un-jointed legs in Opabinia.[1] His examination of the gilled lobopodian Kerygmachela from the Sirius Passet lagerstätte, about 518 million years ago and over 10M years older than the Burgess Shale, convinced him that this specimen had similar legs.[27][28] He considered the legs of these two genera very similar to those of the Burgess Shale lobopodian Aysheaia and the modern onychophorans (velvet worms), which are regarded as the bearers of numerous ansectral traits shared by the ancestors with arthropods.