Mysterious Fossil Found in Museum Storage Turned Out to Be a New, Extinct Lizard Species
Mysterious Fossil Found in Museum Storage Turned Out to Be a New, Extinct Lizard Species
Today, tegus are considered invasive creatures in Florida, but a new paper suggests they’ve lived in the southeastern United States at least once before—millions of years ago
Argentine black and white tegus (Salvator merianae) were brought to the United States in the 1990s by exotic pet traders.
They've since proliferated in the wild and been deemed an invasive species.
Bernard Dupont via Wikimedia Commons under CC BY-SA 2.0
Years ago, Jason Bourque was digging through storage at the Florida Museum of Natural History when he came across a mysterious vertebra from an unknown animal.
He returned to the fossil again and again, trying to figure out which creature it had once belonged to, but he kept coming up empty.
Now, Bourque finally has an answer.
The half-inch-wide bone likely came from a previously unknown, extinct species of lizard known as a tegu, according to a statement from the museum.
Today, tegus in Florida are invasive, having been introduced from South America.
But the discovery suggests a similar reptile had prehistoric roots in the region.
Bourque, a fossil preparator in the Florida Museum’s vertebrate paleontology division, and his colleague Edward Stanley, who directs the museum’s digital imaging laboratory, described the new species in a paper published last month in the Journal of Paleontology.They named the creature Wautaugategu formidusi.
“Wautauga” comes from the name of a forest located near where the fossil was initially unearthed in the early 2000s, according to the statement.
It was discovered by workers at the Gragg Mine, a fuller’s earth clay mine located just north of the Florida border in southwest Georgia, right before the mine closed.
“Formidus,” meanwhile, is the Latin word for “warm.” This part of the name is a nod to the particularly warm period in which the lizard lived, called the Middle Miocene Climatic Optimum.
At that time, between roughly 15 million and 17 million years ago, sea levels were higher than they are now, and most of Florida was underwater.
The historic coastline, for example, could have been in north Florida, not far from where the fossil was discovered.
Because modern tegus are strong swimmers, the researchers suspect W.
formidusi may have swum from its native South America to the present-day southeastern United States, per the statement.
But after that warm period ended and temperatures began to plummet, the cold-blooded W.
formidusi likely struggled to reproduce.
Eventually, the species died out completely.
“We don’t have any record of these lizards before that event, and we don’t have any records of them after that event,” Bourque says in the statement.
“It seems they were here just for a blip, during that really warm period.”
Based on the lack of fossils, it appears W.
formidusi only enjoyed a brief stay in North America.
But Bourque hopes to visit the Florida-Georgia border to search for more W.
formidusi fossils, which might offer further insights into the creature’s sojourn.
Tegus are terrestrial lizards that hail from South America.
But roughly three decades ago, exotic pet traders began bringing Argentine black and white tegus (Salvator merianae) to the United States.
Eventually, though, the pet lizards either escaped or were released into the wild, where they established breeding populations and quickly multiplied.
Argentine black and white tegus can grow to nearly five feet long and weigh up to ten pounds.
They’re problematic because they feast on the eggs and hatchlings of many different native creatures, including some that are threatened or endangered, like gopher tortoises.
In Florida, they’re now considered an invasive species and, as of 2021, it’s illegal to own, breed or sell them (though existing pet tegus are allowed to live out the rest of their lives in captivity, with a permit).
A reptile rescuer holds an Argentine black and white tegu at the Royal Society for the Prevention of Cruelty to Animals in Brighton, England, in 2015.
The animals are kept as exotic pets and became invasive in Florida after being introduced to its environment.
Carl Court / Getty Images
The newly identified fossil adds an earlier chapter to this story.
The findings suggest tegus have lived in Florida at least once before, millions of years ago, though any relation between the two species isn’t clear.
Moving forward, the researchers hope to continue perfecting the novel technique they used to identify the fossil.
First, they took a computed tomography (CT) scan of the vertebra to create a detailed, 3D image.
Then, they carefully measured and noted the location of any “landmarks” on the image—things like holes, bumps, ridges and grooves.
Finally, they used artificial intelligence to compare the 3D image with more than 100 other 3D images of lizard vertebrae in an online database.
The machine learning technique helped them identify the creature as a tegu and even located the vertebra’s original position in the middle of the lizard’s spine.
This method, the researchers say, speeds up the identification of fossils, a process that typically relies on the time and specialized knowledge of experienced paleontologists.
“There are boxes full, shelves full, of fossils that are unsorted, because it requires a huge amount of expertise to identify these things, and nobody has time to look through them comprehensively,” Stanley says in the statement.
“This is a first step towards some of that automation, and it’s very exciting [to] see where it goes from here.”
Get the latest stories in your inbox every weekday.
Source: https://www.smithsonianmag.com/smart-news/mysterious-fossil-found-in-museum-storage-turned-out-to-be-a-new-extinct-lizard-species-180986618/" style="color: #0066cc;">https://www.smithsonianmag.com/smart-news/mysterious-fossil-found-in-museum-storage-turned-out-to-be-a-new-extinct-lizard-species-180986618/
#mysterious #fossil #found #museum #storage #turned #out #new #extinct #lizard #species
Mysterious Fossil Found in Museum Storage Turned Out to Be a New, Extinct Lizard Species
Mysterious Fossil Found in Museum Storage Turned Out to Be a New, Extinct Lizard Species
Today, tegus are considered invasive creatures in Florida, but a new paper suggests they’ve lived in the southeastern United States at least once before—millions of years ago
Argentine black and white tegus (Salvator merianae) were brought to the United States in the 1990s by exotic pet traders.
They've since proliferated in the wild and been deemed an invasive species.
Bernard Dupont via Wikimedia Commons under CC BY-SA 2.0
Years ago, Jason Bourque was digging through storage at the Florida Museum of Natural History when he came across a mysterious vertebra from an unknown animal.
He returned to the fossil again and again, trying to figure out which creature it had once belonged to, but he kept coming up empty.
Now, Bourque finally has an answer.
The half-inch-wide bone likely came from a previously unknown, extinct species of lizard known as a tegu, according to a statement from the museum.
Today, tegus in Florida are invasive, having been introduced from South America.
But the discovery suggests a similar reptile had prehistoric roots in the region.
Bourque, a fossil preparator in the Florida Museum’s vertebrate paleontology division, and his colleague Edward Stanley, who directs the museum’s digital imaging laboratory, described the new species in a paper published last month in the Journal of Paleontology.They named the creature Wautaugategu formidusi.
“Wautauga” comes from the name of a forest located near where the fossil was initially unearthed in the early 2000s, according to the statement.
It was discovered by workers at the Gragg Mine, a fuller’s earth clay mine located just north of the Florida border in southwest Georgia, right before the mine closed.
“Formidus,” meanwhile, is the Latin word for “warm.” This part of the name is a nod to the particularly warm period in which the lizard lived, called the Middle Miocene Climatic Optimum.
At that time, between roughly 15 million and 17 million years ago, sea levels were higher than they are now, and most of Florida was underwater.
The historic coastline, for example, could have been in north Florida, not far from where the fossil was discovered.
Because modern tegus are strong swimmers, the researchers suspect W.
formidusi may have swum from its native South America to the present-day southeastern United States, per the statement.
But after that warm period ended and temperatures began to plummet, the cold-blooded W.
formidusi likely struggled to reproduce.
Eventually, the species died out completely.
“We don’t have any record of these lizards before that event, and we don’t have any records of them after that event,” Bourque says in the statement.
“It seems they were here just for a blip, during that really warm period.”
Based on the lack of fossils, it appears W.
formidusi only enjoyed a brief stay in North America.
But Bourque hopes to visit the Florida-Georgia border to search for more W.
formidusi fossils, which might offer further insights into the creature’s sojourn.
Tegus are terrestrial lizards that hail from South America.
But roughly three decades ago, exotic pet traders began bringing Argentine black and white tegus (Salvator merianae) to the United States.
Eventually, though, the pet lizards either escaped or were released into the wild, where they established breeding populations and quickly multiplied.
Argentine black and white tegus can grow to nearly five feet long and weigh up to ten pounds.
They’re problematic because they feast on the eggs and hatchlings of many different native creatures, including some that are threatened or endangered, like gopher tortoises.
In Florida, they’re now considered an invasive species and, as of 2021, it’s illegal to own, breed or sell them (though existing pet tegus are allowed to live out the rest of their lives in captivity, with a permit).
A reptile rescuer holds an Argentine black and white tegu at the Royal Society for the Prevention of Cruelty to Animals in Brighton, England, in 2015.
The animals are kept as exotic pets and became invasive in Florida after being introduced to its environment.
Carl Court / Getty Images
The newly identified fossil adds an earlier chapter to this story.
The findings suggest tegus have lived in Florida at least once before, millions of years ago, though any relation between the two species isn’t clear.
Moving forward, the researchers hope to continue perfecting the novel technique they used to identify the fossil.
First, they took a computed tomography (CT) scan of the vertebra to create a detailed, 3D image.
Then, they carefully measured and noted the location of any “landmarks” on the image—things like holes, bumps, ridges and grooves.
Finally, they used artificial intelligence to compare the 3D image with more than 100 other 3D images of lizard vertebrae in an online database.
The machine learning technique helped them identify the creature as a tegu and even located the vertebra’s original position in the middle of the lizard’s spine.
This method, the researchers say, speeds up the identification of fossils, a process that typically relies on the time and specialized knowledge of experienced paleontologists.
“There are boxes full, shelves full, of fossils that are unsorted, because it requires a huge amount of expertise to identify these things, and nobody has time to look through them comprehensively,” Stanley says in the statement.
“This is a first step towards some of that automation, and it’s very exciting [to] see where it goes from here.”
Get the latest stories in your inbox every weekday.
Source: https://www.smithsonianmag.com/smart-news/mysterious-fossil-found-in-museum-storage-turned-out-to-be-a-new-extinct-lizard-species-180986618/
#mysterious #fossil #found #museum #storage #turned #out #new #extinct #lizard #species
·32 Views