FAYETTEVILLE, Ark., March 4 (UPI) -- Biologists have identified and named six new species of rattlesnake in the western United States.
All six species had been previously identified as subspecies, but genetic analyses and a reexamination of head shapes confirmed the six snakes were unique enough to warrant their own species classification.
"These snakes have been long been recognized by herpetologists as being demonstrably different," study author Michael Douglas, a professor of biological sciences at Arkansas, said in a news release.
Though none of the newly named species are rare, the individual species designation will offer them greater legal protections in the future should they face environmental threats.
The new species include: the prairie rattlesnake, Crotalus viridis; northern Pacific rattlesnake, Crotalus oreganus; Arizona black rattlesnake, Crotalus cerberus; southern Pacific rattlesnake, Crotalus helleri; midget faded rattlesnake, Crotalus concolor; and great basin rattlesnake, Crotalus lutosus.
The scientific and standard English names have been submitted for ratification by the International Committee on Zoological Nomenclature.