A fearsome lizard whose name means “reaper of death” is the first new tyrannosaur species to be identified in Canada in 50 years, say researchers with the University of Calgary and the Royal Tyrrell Museum. The dinosaur is shown in a handout illustration. (Photo by Julius Csotonyi, University of Calgary

‘Reaper of death:’ Fearsome new dinosaur species discovered in Alberta

Tyrannosaur not believed to have been a direct ancestor of T. rex, but its own evolutionary offshoot

A fearsome lizard with a name meaning “reaper of death” is the first new tyrannosaur species to be identified in Canada in 50 years, say researchers with the University of Calgary and the Royal Tyrrell Museum.

Tyrannosaurs were large meat-eating dinosaurs that walked on two legs and had short arms, two fingers and massive skulls with dagger-like teeth. Tyrannosaurus rex is the most famous in this group.

Jared Voris was examining skull fragments stored in a drawer at the Royal Tyrrell Museum in Drumheller, Alta., as part of his masters thesis when he noticed features not seen in other tyrannosaur specimens. The most obvious were prominent vertical ridges along the upper jaw line.

“We’d find one feature, and then we’d find another, and then it would just kind of cascade into finally understanding that this was something completely different than what we’d seen before,” said Voris, who is now working on his PhD in paleontology at the University of Calgary.

Voris, 25, said “it’s definitely a weird feeling” to make a big discovery so early in his career.

He figures the beast could have been about eight metres long with an 80-centimetre skull.

“It would have been quite an imposing animal,” he said. ”It definitely would have caused some panic.”

READ MORE: B.C. researcher unveils province’s first unique dinosaur discovery

The new species is named Thanatotheristes degrootorum, which combines the Greek word for “reaper of death” with the name of a southern Alberta couple, the DeGroots, who happened upon the fossil fragments along the shore of the Bow River west of Medicine Hat, Alta., in 2010.

Darla Zelenitsky, who is Voris’s PhD thesis supervisor, said Thanatotheristes predates T. rex by about 12 million years and is the oldest known tyrannosaur discovered in Canada.

She said it offers clues about a poorly understood time period.

“We’re learning more about the ecosystem at this older period of time when dinosaurs roamed southern Alberta,” she said.

Only two other dinosaurs have been found in the same rock formation, and both were plant-eaters.

“This is the first apex predatory dinosaur species known from this formation,” said Zelenitsky.

“To me this is a big discovery and it’s even more exciting because it was made by one of my students.”

ALSO READ: Meet the T. rex cousin who you could literally look down on

The new tyrannosaur is not believed to have been a direct ancestor of T. rex, but was its own evolutionary offshoot. It seems to have more in common with a type of tyrannosaur found in Alberta called Daspletosaurus.

Francois Therrien, a paleontologist at the Royal Tyrrell, said the general public can play a role in new discoveries, just like the DeGroots did.

“A lot of people go in areas that paleontologists would not think of going, either because we’re unaware that there’s exposures in that area or just because there’s bigger pockets of badlands that we tend to focus on,” he said.

Anyone who finds a fossil should leave it where it is, note its exact location and contact the museum, he said.

Therrien, who also worked with Voris, said the student’s discovery is significant.

“First, discovering a new species and, second, it is a tyrannosaur. I don’t think it gets any better than that.”

An article detailing Thanatotheristes degrootorum and written by Voris, Zelenitsky, Therrien and paleontologist Caleb Brown, was published Monday in the journal Cretaceous Research.

Lauren Krugel, The Canadian Press

Like us on Facebook and follow us on Twitter.

Science

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

BC Parks acquires private land in Cape Scott Provincial Park

Land previously held by B.C. land and cattle mogul Rudy Nielsen

Family Literacy Society surveying essential skills among displaced workers

Survey results will help get training opportunities to fufill real needs on the north Island

A thousand items donated to the Port Hardy RCMP’s summer toy drive

‘Building strong relationships with the people of our communities is fundamental to our success here’

VIDEO: Rescued eagle released back into the wild

The three-year-old female had been mired in grease at the landfill, but recovered with gusto

U’mista Cultural Centre will host a native art contest to raise funds for artists

All artists of Kwakwa̱ka̱’wakw descent are being called to participate in the contest to be held on August 28

STANDING TALL: For some, B.C.’s forest industry is the best office in the world

A look at the forest sector in B.C. – and those hoping for the best – amid mill curtailments

Bad behaviour at B.C. restaurants ignites campaign calling for respect

“If you can’t follow the rules, then stay home,” says BC Restaurant and Foodservices Association

Frustration mounts as Metchosin sheep slaughter continues

Metchosin mayor upset with B.C. Conservation’s response as bear feeds on farm animals

Over half of Americans oppose Trump tariff on Canadian aluminum: survey

The survey was conducted Aug. 7 to 9 among 1,513 Canadians and 1,003 Americans

Oh baby, what a birthday gift: $2.8M raised to help B.C. boy with rare disease

‘We are very thankful to everybody,’ Aryan Deol’s father says

‘Huckleberry’ the bear killed after B.C. residents admit to leaving garbage out for videos

North Shore Black Bear Society said it was local residents who created a ‘death sentence’ for bear

Police investigating after insults, expletives yelled at federal minister’s staff

A 90-second video circulating on social media appears to have been shot by the person who was yelling

Central Vancouver Island’s Green Mountain fire under full control

Fire fighters still monitoring site between Cowichan Lake and Nanaimo River

5 B.C. First Nations call out Canada for ‘discriminatory’ food fish practices

West Coast nations say government ignoring court-won right to chinook and coho

Most Read