Oldest-known Ant Preserved in 113 Million-year-old Brazilian Fossil

A 113-million-year-old fossilized ant preserved in limestone unearthed in northeastern Brazil, the world's oldest-known ant specimen is seen in this photograph released on April 24, 2025. Anderson Lepeco/Current Biology/Handout via REUTERS
A 113-million-year-old fossilized ant preserved in limestone unearthed in northeastern Brazil, the world's oldest-known ant specimen is seen in this photograph released on April 24, 2025. Anderson Lepeco/Current Biology/Handout via REUTERS
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Oldest-known Ant Preserved in 113 Million-year-old Brazilian Fossil

A 113-million-year-old fossilized ant preserved in limestone unearthed in northeastern Brazil, the world's oldest-known ant specimen is seen in this photograph released on April 24, 2025. Anderson Lepeco/Current Biology/Handout via REUTERS
A 113-million-year-old fossilized ant preserved in limestone unearthed in northeastern Brazil, the world's oldest-known ant specimen is seen in this photograph released on April 24, 2025. Anderson Lepeco/Current Biology/Handout via REUTERS

Scientists have identified the fossilized remains of the oldest-known ant - a winged insect with fearsome scythe-like jaws that lived about 113 million years ago during the age of dinosaurs and was preserved in limestone unearthed in northeastern Brazil.
The species, called Vulcanidris cratensis, is part of a lineage called hell ants - named for their demonic-looking jaws - that prospered in a wide geographical range during the Cretaceous Period but have no descendants alive today, Reuters reported. A previously discovered Cretaceous hell ant was named Haidomyrmex in honor of Hades, the ancient Greek god of the underworld.
A medium-sized ant about a half-inch (1.35 cm) long, Vulcanidris possessed highly specialized jaws that would have enabled it to pin down or impale prey. Like some ants alive today, it had wings and appears to have been a capable flier. It also had a well-developed stinger like a wasp.
"It would probably be confused with a wasp by an untrained eye," said entomologist Anderson Lepeco of the Museum of Zoology of the University of São Paulo, lead author of the study published this week in the journal Current Biology.
"They probably used their mandibles (mouthparts) to handle their prey in a specific way," Lepeco said.
Its mandibles moved up and down and not side to side, as they do in today's ants.
"Currently, many odd mandible shapes can be found in ants, but they usually articulate horizontally," Lepeco said.
This ant is roughly 13 million years older than the previous oldest-known ants, specimens found in France and Myanmar that were preserved in amber, which is fossilized tree sap.
The Vulcanidris anatomy is remarkably well preserved in the limestone, which was excavated decades ago in the Crato geological formation in the Brazilian state of Ceará, probably in the 1980s or 1990s, according to Lepeco. It was held in a private collection before being donated to the São Paulo museum about five years ago.
"I was looking for wasps among the fossils of the collection and was shocked when I recognized this one as a close relative of a hell ant previously described from Burmese amber," Lepeco said, referring to the fossil from Myanmar.
The specialized nature of the Vulcanidris anatomy and the fact that two hell ants lived so far from each other during this part of the Cretaceous suggest that ants as a group emerged many millions of years before this newly identified species existed.
"According to molecular estimates, ants originated between 168 million and 120 million years ago. This new finding supports an earlier age within these limits," Lepeco said.
Ants are believed to have evolved from a form of wasp. Their closest living relatives are wasps and bees.
Vulcanidris inhabited an ecosystem teeming with life. Fossils from the region show that Vulcanidris lived alongside other insects, spiders, millipedes, centipedes, various crustaceans, turtles, crocodilians, flying reptiles called pterosaurs, birds and dinosaurs including the feathered meat-eater Ubirajara. The ant's predators may have included frogs, birds, spiders and larger insects.
Ants have colonized almost everywhere on Earth, and research published in 2022 estimated that their total population is 20 quadrillion globally. That dwarfs the human population of about 8 billion.
"They are one of the most abundant groups in most environments on Earth," Lepeco said.
"They play many roles where they occur, such as predation and herbivory, controlling populations of other organisms. They also have intrinsic relationships with specific plants and insects, protecting them from other animals. Subterranean and litter ants help in soil health, and they may also act as decomposers, feeding on dead organisms," Lepeco said.



Largest Piece of Mars on Earth Fetches $5.3 Million at Auction, but Young Dinosaur Steals the Show

A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, at Sotheby's, in New York, July 9, 2025. (AP)
A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, at Sotheby's, in New York, July 9, 2025. (AP)
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Largest Piece of Mars on Earth Fetches $5.3 Million at Auction, but Young Dinosaur Steals the Show

A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, at Sotheby's, in New York, July 9, 2025. (AP)
A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, at Sotheby's, in New York, July 9, 2025. (AP)

The largest piece of Mars ever found on Earth was sold for just over $5 million at an auction of rare geological and archaeological objects in New York on Wednesday. But a rare young dinosaur skeleton stole the show when it fetched more than $30 million in a bidding frenzy.

The 54-pound (25-kilogram) rock named NWA 16788 was discovered in the Sahara Desert in Niger by a meteorite hunter in November 2023, after having been blown off the surface of Mars by a massive asteroid strike and traveling 140 million miles (225 million kilometers) to Earth, according to Sotheby's. The estimated sale price before the auction was $2 million to $4 million.

The identity of the buyer was not immediately disclosed. The final bid was $4.3 million. Adding various fees and costs, the official sale price was about $5.3 million. The live bidding was slow, with the auctioneer trying to coax more offers and decreasing the minimum bid increases.

The dinosaur skeleton, on the other hand, sparked a bidding war. With a pre-auction estimate of $4 million to $6 million, it is one of only four known Ceratosaurus nasicornis skeletons and the only juvenile skeleton of the species, which resembles the Tyrannosaurus rex but is smaller.

Bidding for the skeleton started with a high advance offer of $6 million, then escalated during the live round with bids $500,000 higher than the last and later $1 million higher than the last before ending at $26 million. People applauded after the auctioneer gaveled the bidding closed.

The official sale price was $30.5 million with fees and costs. That buyer also was not immediately disclosed.

Parts of the skeleton were found in 1996 near Laramie, Wyoming, at Bone Cabin Quarry, a gold mine for dinosaur bones. Specialists assembled nearly 140 fossil bones with some sculpted materials to recreate the skeleton and mounted it so it’s ready to exhibit, Sotheby’s says. It was acquired last year by Fossilogic, a Utah-based fossil preparation and mounting company.

It’s more than 6 feet (2 meters) tall and nearly 11 feet (3 meters) long, and is believed to be from the late Jurassic period, about 150 million years ago. Ceratosaurus dinosaurs could grow up to 25 feet (7.6 meters) long, while the T. rex could be 40 feet (12 meters) long.

The bidding for the Mars meteorite began with two advance offers of $1.9 million and $2 million. The live bidding slowly proceeded with increases of $200,000 and $300,000 until $4 million, then continued with $100,000 increases until reaching $4.3 million.

The red, brown and gray meteorite is about 70% larger than the next largest piece of Mars found on Earth and represents nearly 7% of all the Martian material currently on this planet, Sotheby’s says. It measures nearly 15 inches by 11 inches by 6 inches (375 millimeters by 279 millimeters by 152 millimeters).

It was also a rare find. There are only 400 Martian meteorites out of the more than 77,000 officially recognized meteorites found on Earth, the auction house says.

“This Martian meteorite is the largest piece of Mars we have ever found by a long shot,” Cassandra Hatton, vice chairman for science and natural history at Sotheby’s, said in an interview before the auction. “So it’s more than double the size of what we previously thought was the largest piece of Mars.”

It’s not clear exactly when the meteorite was blasted off the surface of Mars, but testing showed it probably happened in recent years, Sotheby's says.

Hatton said a specialized lab examined a small piece of the red planet remnant and confirmed it was from Mars. It was compared with the distinct chemical composition of Martian meteorites discovered during the Viking space probe that landed on Mars in 1976, she said.

The examination found that it is an “olivine-microgabbroic shergottite,” a type of Martian rock formed from the slow cooling of Martian magma. It has a course-grained texture and contains the minerals pyroxene and olivine, Sotheby’s says.

It also has a glassy surface, likely due to the high heat that burned it when it fell through Earth’s atmosphere, Hatton said. “So that was their first clue that this wasn’t just some big rock on the ground,” she said.

The meteorite previously was on exhibit at the Italian Space Agency in Rome. Sotheby’s did not disclose the owner.

Wednesday’s auction was part of Sotheby’s Geek Week 2025 and featured 122 items, including other meteorites, fossils and gem-quality minerals.