sentences:  Thus, the salticoids presumably originated during or around the PETM or a bit earlier, but no corresponding fossils have been found yet.Their sister lineage, the Amycoida, probably originated by dispersal across the ocean to South America, which at the end of the Mesozoic was closest to Africa, Antarctica and North America.The major clades of salticoids are spread globally and for the most part replace each other geographically, so little can be inferred from them.