Here's a cool site on the New Guinea Singing Dog:
First brought to the attention of the scientific community in the early 1950's, the New Guinea Singing Dog NGSD ) was initially described as a distinct species and named Canis hallstromi after Sir Edward Halistrom, who brought the first pair out of the Southern Highlands District of Papua New Guinea to the Taronga Zoo in Sydney, Australia in 1957. In 1969 the NGSD was reclassified as a subspecies of the dingo group, Canis lupus ( or familiaris) dingo.
The NGSD's precise taxonomic status and phylogenetic relationships are matters of current scientific controversy. Studies, especially DNA analysis, are now beginning to suggest that NGSDs almost certainly differ from the modern breeds of dog to a greater degree than those breeds differ from each other. Further studies may eventually justify its separation from the Australian Dingo through the designation Canis lupus (or familiaris) hallstromi.
Read the rest at:
http://www.canineworld.com/ngsdcs/history.html