Small Tyrannosaur relative discovered


This 6 May 2019 video from the USA says about itself:

I attended the press conference this morning at the Arizona Museum of Natural History where I volunteer in Mesa, AZ announcing a new species of tyrannosaur, Suskityrannus hazelea, which means Hazel’s Coyote Tyrant. Suski is the word for coyote in the Zuni language from the area where the discovery was made on the border of Arizona and New Mexico.

The speakers are Museum Director Tom Wilson, Hazel Wolfe (namesake), Paleontologist Doug Wolfe, Curator of Paleontology Dr. Robert McCord, Paleo Artist Benji Paysnoe, and Curator of Education Alison Stoltman. Dr. Sterling Nesbitt was just 16 years old when he discovered the first fossil specimens of this species while on a dig with Doug Wolfe and the Southwest Paleontological Society.

I can’t stress enough the importance that organizations like that have in promoting Citizen Science and how they have lead to many new discoveries. Please check out my video on Citizen Science at the link. It also features other dinosaur discoveries here in Arizona.

From Virginia Tech in the USA:

New 3-foot-tall relative of Tyrannosaurus rex

May 6, 2019

Summary: ‘Suskityrannus gives us a glimpse into the evolution of tyrannosaurs just before they take over the planet,’ said Sterling Nesbit.

A new relative of the Tyrannosaurus rex — much smaller than the huge, ferocious dinosaur made famous in countless books and films, including, yes, “Jurassic Park” — has been discovered and named by a Virginia Tech paleontologist and an international team of scientists.

The newly named tyrannosauroid dinosaur — Suskityrannus hazelae — stood roughly 3 feet tall at the hip and was about 9 feet in length, the entire animal only marginally longer than just the skull of a fully grown Tyrannosaurus rex, according to Sterling Nesbitt, an assistant professor with Department of Geosciences in the Virginia Tech College of Science. In a wild twist to this discovery, Nesbitt found the fossil at age 16 whilst a high school student participating in a dig expedition in New Mexico in 1998, led by Doug Wolfe, an author on the paper.

In all, Suskityrannus hazelae is believed to have weighed between 45 and 90 pounds. The typical weight for a full-grown Tyrannosaurus rex is roughly 9 tons. Its diet likely consisted of the same as its larger meat-eating counterpart, with Suskityrannus hazelae likely hunting small animals, although what it hunted is unknown. The dinosaur was at least 3 years old at death based on an analysis of its growth from its bones.

The fossil dates back 92 million years to the Cretaceous Period, a time when some of the largest dinosaurs ever found lived.

“Suskityrannus gives us a glimpse into the evolution of tyrannosaurs just before they take over the planet,” Nesbitt said. “It also belongs to a dinosaurian fauna that just proceeds the iconic dinosaurian faunas in the latest Cretaceous that include some of the most famous dinosaurs, such as the Triceratops, predators like Tyrannosaurus rex, and duckbill dinosaurs like Edmo[n]tosaurus.”

The findings are published in the latest online issue of Nature Ecology & Evolution. In describing the new find, Nesbitt said, “Suskityrannus has a much more slender skull and foot than its later and larger cousins, the Tyrannosaurus rex. The find also links the older and smaller tyrannosauroids from North America and China with the much larger tyrannosaurids that lasted until the final extinction of non-avian dinosaurs.

(Tyrannosaurus rex small arm jokes abound. So, if you’re wondering how small the arms of Suskityrannus were, Nesbitt and his team are not exactly sure. No arm fossils of either specimen were found, but partial hand claws were found. And, they are quite small. Also not known: If Suskityrannus had two or three fingers.)

Two partial skeletons were found. The first included a partial skull that was found in 1997 by Robert Denton, now a senior geologist with Terracon Consultants, and others in the Zuni Basin of western New Mexico during an expedition organized by Zuni Paleontological Project leader Doug Wolfe.

The second, more complete specimen was found in 1998 by Nesbitt, then a high school junior with a burgeoning interest in paleontology, and Wolfe, with assistance in collection by James Kirkland, now of the Utah Geological Survey. “Following Sterling out to see his dinosaur, I was amazed at how complete a skeleton was lying exposed at the site,” Kirkland said.

For much of the 20 years since the fossils were uncovered, the science team did not know what they had.

“Essentially, we didn’t know we had a cousin of Tyrannosaurus rex for many years,” Nesbitt said. He added the team first thought they had the remains of a dromaeosaur, such as Velociraptor. During the late 1990s, close relatives [of] Tyrannosaurus rex simply were not known or not recognized. Since then, more distant cousins of Tyrannosaurus rex, such as Dilong paradoxus, have been found across Asia.

The fossil remains were found near other dinosaurs, along with the remains of fish, turtles, mammals, lizards, and crocodilians. From 1998 until 2006, the fossils remain[ed] stored at the Arizona Museum of Natural History in Mesa, Arizona. After 2006, Nesbitt brought the fossils with him through various postings as student and researcher in New York, Texas, Illinois, and now Blacksburg. He credits the find, and his interactions with the team members on the expedition, as the start of his career.

“My discovery of a partial skeleton of Suskityrannus put me onto a scientific journey that has framed my career,” said Nesbitt, also a member of the Virginia Tech Global Change Center. “I am now an assistant professor that gets to teach about Earth history.”

The name Suskityrannus hazelae is derived from “Suski”, the Zuni Native American tribe word for “coyote,” and from the Latin word ‘tyrannus’ meaning king and ‘hazelae’ for Hazel Wolfe, whose support made possible many successful fossil expeditions in the Zuni Basin. Nesbitt said permission was granted from the Zuni Tribal Council to use the word “Suski”.

2 thoughts on “Small Tyrannosaur relative discovered

  1. Pingback: Appalachiosaurus, big North American carnivorous dinosaur | Dear Kitty. Some blog

  2. Pingback: ‘Nanotyrannus were young Tyrannosaurus rex’ | Dear Kitty. Some blog

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