"Maddock made his discovery not by trekking through the Australian outback but by studying the DNA of various death adders, a group of snakes native to Australia, New Guinea, and Indonesia that are among the world's most venomous."
Maddock and his team of scientists were gathering DNA from 8 different species of the death adder and found a strange finding. There were DNA samples that just didn't match the rest. He then analyzed 112 specimens in total, including 32 of the new death adder species. This finding came from a simple coincidence and shows the importance of DNA analysis to identify species. http://news.nationalgeographic.com/2015/09/150929-death-adders-snakes-species-animals-australia/
I found this article very interesting and informing. It's exciting that this snake was hiding in plain sight identifying itself as the death adder even though its a subspecies. The technology we have today has made this possible and I'm sure there will be great discoveries within species identification.
Another link about death adders: http://www.factzoo.com/reptiles/snakes/australian-death-adder-worlds-deadliest.html