(pronounced yah-NEN-chee-ah) Janenschia (named after Werner Janensch) was an 80 feet (24 m) long sauropod dinosaur found in Tanzania, Africa . Only 2 forelimbs, 3 clawed hindlimbs, and back and tail vertebrae were found. This enormous, long-necked, long-tailed plant-eater lived during the late Jurassic period , about 156-150 million years ago. It i...