Name that mammal: Researchers find new humpback dolphin species near Australia

For years, biologists have argued over the number of species of humpback dolphins. Recent research somewhat settles the debate, as a team of biologists have discovered at least four distinct species – one of which had previously gone unnoticed. 

Jonathan Hayward/The Canadian Press/AP
Pacific white side dolphins swim near Vancouver Island in British Columbia. There are about 36 species of oceanic dolphins.

Humpback dolphins have the scientific community stumped. 

A team of biologists have recently discovered a brand new species of the marine mammal, which is classified as a member of the genus Sousa and has a distinct hump under its dorsal fin. The discovery clears up a longstanding debate over the exact number of humpback dolphin species. 

In the past, biologists had proposed the existence of three species, National Geographic reports. But after studying the genetics and physical features of more than 200 Sousa dolphins, researchers from the Wildlife Conservation Society and other groups say they have found a fourth, unnamed kind.

“Based on the findings of our combined morphological and genetic analyses, we can suggest that the humpback dolphin genus includes at least four member species,” said Dr. Martin Mendez, the study's lead author, in a press release. “This discovery helps our understanding of the evolutionary history of this group and informs conservation policies to help safeguard each of the species.” 

Researchers say the discovery could help in preserving the animal. 

New species information "provides the needed scientific evidence" for protecting the habitats and genetic diversity of the dolphin, said Dr. Howard Rosenbaum, senior author of the paper, in the release.

The International Union for Conservation of Nature lists the Atlantic humpback dolphin, a typically acknowledged species, as "vulnerable" – just one step below the "endangered" category.

There are about 36 species of oceanic dolphins, and establishing a new one is rare. But remarkably, this is the second oceanic dolphin discovery to surprise scientists in two years.

In 2011, Monash University researcher Kate Charlton-Robb discovered a new coastal dolphin species she named the Burrunan dolphin. She called the finding "incredibly fascinating" because only three new dolphin species had been officially recognized since the 1800s. 

Oceanic dolphins fall under the delphinidae family, although they are often confused with the shorter, stouter porpoises of the Phocoenidae family. 

You've read  of  free articles. Subscribe to continue.

Dear Reader,

About a year ago, I happened upon this statement about the Monitor in the Harvard Business Review – under the charming heading of “do things that don’t interest you”:

“Many things that end up” being meaningful, writes social scientist Joseph Grenny, “have come from conference workshops, articles, or online videos that began as a chore and ended with an insight. My work in Kenya, for example, was heavily influenced by a Christian Science Monitor article I had forced myself to read 10 years earlier. Sometimes, we call things ‘boring’ simply because they lie outside the box we are currently in.”

If you were to come up with a punchline to a joke about the Monitor, that would probably be it. We’re seen as being global, fair, insightful, and perhaps a bit too earnest. We’re the bran muffin of journalism.

But you know what? We change lives. And I’m going to argue that we change lives precisely because we force open that too-small box that most human beings think they live in.

The Monitor is a peculiar little publication that’s hard for the world to figure out. We’re run by a church, but we’re not only for church members and we’re not about converting people. We’re known as being fair even as the world becomes as polarized as at any time since the newspaper’s founding in 1908.

We have a mission beyond circulation, we want to bridge divides. We’re about kicking down the door of thought everywhere and saying, “You are bigger and more capable than you realize. And we can prove it.”

If you’re looking for bran muffin journalism, you can subscribe to the Monitor for $15. You’ll get the Monitor Weekly magazine, the Monitor Daily email, and unlimited access to CSMonitor.com.

QR Code to Name that mammal: Researchers find new humpback dolphin species near Australia
Read this article in
https://www.csmonitor.com/Science/2013/1030/Name-that-mammal-Researchers-find-new-humpback-dolphin-species-near-Australia
QR Code to Subscription page
Start your subscription today
https://www.csmonitor.com/subscribe