99-Million-Year-Old Spider Mummy Sported Horned Fangs

These ancient, extinct spiders are part of a spider family called Tetrablemmidae, a group whose males often have horns on their heads and fangs, said study lead author Paul Selden, a professor of invertebrate paleontology at the University of Kansas. Burmese amber occurs on a geological plate called the West Burma block, which was attached to Australia about 400 million years ago, he said.