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Tiny extinct crocodyliform with unusual teeth discovered in Montana

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Tiny extinct crocodyliform with unusual teeth discovered in Montana


An artistic rendering of Thikarisuchus xenodentes, an extinct crocodyliform from the Cretaceous of Montana. Credit: Dane Johnson/Museum of the Rockies

About 95 million years ago, a juvenile crocodyliform nicknamed Elton lived in what is now southwest Montana at the edge of the Western Interior Seaway.

Measuring no more than 2 feet long from nose to tip of tail, young Elton was about the size of a big lizard, according to Montana State University professor of paleontology David Varricchio. Had it lived to be full grown, Elton would have measured no longer than 3 feet, far smaller than most members of the Neosuchia clade to which it and its distant relatives belong.

The clade includes modern crocodilians and their closest extinct relatives, almost all of them semiaquatic or marine carnivores with simple, conical teeth.

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Elton, by contrast, lived on the land, probably feasting on both plants and insects or small animals with its assortment of differently shaped and specialized teeth. Its unique anatomy reveals that it was part of a new, previously unrecognized family of crocodyliforms endemic to the Cretaceous of North America.

If not for the sharp eye of Harrison Allen, a 2023 graduate of MSU’s Department of Earth Sciences in the College of Letters and Science, Elton’s ancient remains may never have been discovered. But during a dig in the summer of 2021 in the Blackleaf geological formation on U.S. Forest Service land near Dillon, Allen—then a student in Varricchio’s field paleontology course—noticed a fossil the size of the tip of his pinkie with a “weird texture on it.”

“I brought it to Dr. Varricchio and knew it must be something good, because he said, ‘Take me to where you found this,’” said Allen, who is now studying croc paleontology as a doctoral student at Stony Brook University in New York.

It was an exciting moment for Allen, originally from Kentucky, who chose MSU because it offers a paleontology track for undergraduates majoring in earth sciences.

Four years and hundreds of hours of study later, he is the lead author of a paper published in the Journal of Vertebrate Paleontology that describes the morphology and scientific significance of the creature whose remains he found in the Blackleaf Formation.

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“After the dig, Dr. Varricchio told me why he was so excited the day I found the initial specimen. It had so much visible anatomy to explore, and he could see it was a tiny, tiny croc skull, fully articulated and preserved—it was a special thing,” Allen said.

“We have found dinosaurs (in the Blackleaf) before, but this was the second known vertebrate animal we’d ever found in this formation.”

The extinct animal, which Allen and the paper’s co-authors later named Thikarisuchus xenodentes for its strange, sheathed teeth, has provided new information about the paleoecology of the Blackleaf ecosystem and about patterns of evolution in the croc family tree.

It also provided the ultimate undergraduate research project for Allen, who delved into the painstaking process of excavating, sifting and reconstructing the Thikarisuchus remains with the help of some fellow students.

“As an undergraduate student new to research, I nervously went up to Dr. Varricchio and asked if I could study this specimen,” Allen said. “It led me down the rabbit hole into this amazing world of prehistoric, extinct crocs and their evolutionary niches.”

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The day after Allen recovered the first piece of skeleton, he and his classmates scooped up several bags of sediment from the mound where it was found.

Back in Bozeman, Allen and his friend Dane Johnson, who graduated in 2022 and is now a paleontology lab and field specialist at MSU’s Museum of the Rockies, spent between 10 and 20 hours sifting out fine particulate matter and dirt, eventually recovering dozens of tiny pieces of the Thikarisuchus skeleton that collectively fit into the palm of Allen’s hand.

As they worked, they listened to music, including Elton John’s 1970s hit “Crocodile Rock.” The nickname “Elton” stuck, long before the specimen was assigned the scientific name that reflects its physical traits.

Allen and Johnson recovered bits of bone from almost all areas of the animal’s body, including its limbs, vertebrae, jaw and 50-millimeter-long skull. Because the fragments were tiny and exceptionally fragile, the students didn’t attempt to physically reassemble them.

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Instead, they took them for a series of CT scans, including some at MSU’s Subzero Research Laboratory. Allen estimates that he spent well over 100 hours coloring the digital, 2D segment slices that the scans produced, a process necessary to visually distinguish the bones from the rocks they were embedded in.

“Harrison worked super hard to digitally reconstruct the animal, and it came out beautifully,” said Varricchio.

During the process, Allen discovered that the bones of Thikarisuchus were densely concentrated and organized in a manner consistent with fossils of organisms found in burrows in the Blackleaf Formation and the nearby Wayan Formation in Idaho.

He said this suggests that Thikarisuchus was likewise preserved within a burrow, further supporting the notion that fossils recovered from these formations are biased toward those that were preserved in burrows.

The specimen also presented clues about Thikarisuchus’ newly named family group Wannchampsidae and a similar group found in Eurasia known as Atopasauridae.

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Both groups were tiny and terrestrially adapted, and they shared certain cranial and dental features found in another more distantly related group from the Cretaceous of Africa and South America.

“It suggests that during the same time period, we’re seeing convergent evolution between two distantly related groups due to similar environmental conditions, prey availability and who-knows-what that prompted crocs on opposite sides of the planet to develop similar features,” Allen said.

As he works toward his Ph.D. and a career as a paleontology professor, Allen said his experiences with Elton cemented his research interest, which has since broadened to include extinct crocs from all over the world.

“The majority of diversity of crocodyliforms is in the past. There were fully marine crocs, fully terrestrial crocs, herbivorous crocs, omnivores and some that cracked shells,” he said. “That amazed me and made me want to get into this more specific realm of paleontology.”

Varricchio said he feels fortunate that students like Allen choose to study at MSU.

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“It was a true pleasure to have Harrison as a student here—so much positive enthusiasm, followed up with great research,” he said.

More information:
Harrison J. Allen et al, A new, diminutive, heterodont neosuchian from the Vaughn Member of the Blackleaf Formation (Cenomanian), southwest Montana, and implications for the paleoecology of heterodont neosuchians, Journal of Vertebrate Paleontology (2025). DOI: 10.1080/02724634.2025.2542185

Provided by
Montana State University

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Citation:
Tiny extinct crocodyliform with unusual teeth discovered in Montana (2025, September 23)
retrieved 23 September 2025
from https://phys.org/news/2025-09-tiny-extinct-crocodyliform-unusual-teeth.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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SLIDESHOW: Severe storms moved through western Montana on Thursday

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SLIDESHOW: Severe storms moved through western Montana on Thursday


Severe storms moved through parts of Montana on Thursday, prompting a total of 5 Severe Thunderstorm Warnings. Reports included strong wind gusts and hail in several communities, including Augusta, Choteau, Sunburst, Bigfork, Kalispell and Evergreen.

The strongest reported wind gust was 60 mph near Augusta, while hail up to 1 inch was reported near Evergreen and Kalispell.

STORM REPORTS:

12 SE Grant — 56 mph thunderstorm wind gust
7 NNE Augusta — 60 mph thunderstorm wind gust
5 ENE Choteau — 59 mph thunderstorm wind gust
Sunburst — 54 mph thunderstorm wind gust
Ennis — 59 mph thunderstorm wind gust
3 SSW Ennis — 52 mph thunderstorm wind gust
2 E Helena — 54 mph thunderstorm wind gust
19 E Swan Lake — 56 mph thunderstorm wind gust
2 NNW Yaak — thunderstorm wind damage – Multiple downed trees reported along Highway 2 between MM 3 and 8
3 WSW Blacktail — 53 mph thunderstorm wind gust
1 NNW Troy — 49 mph thunderstorm wind gust
5 ENE Choteau — 56 mph thunderstorm wind gust

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Turah — 0.88″ hail
1 NNW Bigfork — 0.75″ hail
3 SW La Salle — 0.50″ hail
2 N Evergreen — 1.00″ hail
1 W Kalispell — 1.00″ hail
3 WNW Kalispell — 0.75″ hail

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Las Vegas man sentenced after Helena coin shop burglary in Montana

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Las Vegas man sentenced after Helena coin shop burglary in Montana


A man from Las Vegas has been sentenced after stealing coins and precious metals from a Helena shop in Montana.

This comes after Bishop Lott, 47, pleaded guilty in January to one count of interstate transportation of stolen property.

A judge sentenced Lott on Thursday to 27 months in prison, followed by three years of supervised release. He was also ordered to pay $276,153.08 in restitution to the Helena business as well as five other theft victims.

MORE | Southern California man pleads guilty to importing, trafficking 70 pounds of ketamine

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The government alleged in court documents that Lott, along with Ricky Rynell Rose, broke into Wayne Miller Coins in Helena and stole nearly $59,000 in coins and precious metals from a Helena business.

Rose pleaded guilty last year and was sentenced to 39 months in prison.

The Helena Police Department received a call on March 3, 2024, reporting that Wayne Miller Coins had been burglarized earlier that day.

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As part of their investigation, Helena police officers reviewed surveillance footage from multiple businesses. They analyzed email account data, which led them to Lott and Rose, who had taken the stolen material to Nevada.



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A battle over dark money is brewing in Hawaii and Montana

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A battle over dark money is brewing in Hawaii and Montana


Political spending that is funneled into elections from a variety of nonprofits is known as dark money — and unlike campaign spending or the money deployed by PACs and super PACs, these sources are not required to disclose their donors. Following the Supreme Court’s 2010 Citizens United decision, which created the country’s current election spending landscape, this has ramped up dramatically, with the 2024 election seeing a record $1.9 billion in dark money spending, nearly double the $1 billion spent in 2020. Now, some campaign finance reformers think they’ve found a state-level reform that can rein in this spending.

Now, campaign finance reformers think they’ve found a solution, and it’s already in place in Hawaii.

A newly enacted corporate law, SB 2471, changes the powers that corporations, or other artificial persons like nonprofits, are granted by the state of Hawaii. In the United States, states grant artificial persons powers as part of an agreement that allows those artificial persons to operate in the state. SB 2471 works by changing the powers that Hawaii grants these entities to disallow them from spending on politics at all.

Tom Moore, a senior fellow at the Center for American Progress and former chief of staff to  Federal Election Commission commissioner Ellen Weintraub, told Salon that the law operates upstream of Citizens United by dealing with the powers granted to corporations and other artificial persons, rather than trying to regulate what they can and cannot do with those powers.

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“Citizens United said, ‘Hey, if you’re a corporation that is empowered to spend in politics, your right to spend independently in politics can’t be infringed,’” Moore said. “Fine. What this [Hawaiian law] does is say, ‘You know, we’re not going to create that kind of corporation anymore. We’re going to create the kind of corporation that doesn’t have any political spending powers.’ Citizens United and all the other campaign finance cases that the courts have ever decided do not speak to that.”

In his analysis, Moore said this strategy also has a better chance of standing up to scrutiny from the Supreme Court because courts have long upheld a state’s ability to assign powers to corporations operating within their borders, going back hundreds of years.

“They’re gimmicks, and the Supreme Court is not usually impressed by gimmicks.”

“The Supreme Court has said for 200 years that the states can do whatever they want in terms of assigning powers to corporations. They made a fatal assumption in Citizens United that 100 years ago, when states gave away all the powers and said, ‘You can do anything that a human could do,’ they assumed that states would never change their mind on that,” Moore said. “But they never said the states couldn’t change their mind on that, and now they are.”

For example, a recent court ruling in Delaware allowed a change to a town charter that would allow corporations to vote there under some circumstances.

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Moore believes that this Hawaiian law, and others like it in the works in other states, have a good chance of surviving at the Supreme Court. However, some critics disagree, saying this legal maneuver is likely to be struck down.

Brad Smith, the chairman and founder of the Institute for Free Speech, a nonprofit that advocates against limits on political speech, including political spending, called the move an “end run” around Citizens United.

“They’re gimmicks, and the Supreme Court is not usually impressed by gimmicks. If you want to do it, you probably have to change the makeup of the Supreme Court or be willing to pack the court and have the political muscle to do it,” Smith said.

In his opinion, the court is likely to see Hawaii’s law as a violation of the First Amendment and is unlikely to look favorably on the argument that these laws deal with powers rather than with rights and that this has to do with how corporations have changed in the past 200 years.


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Smith explained that in the past, states used to create bespoke statutes for corporations to do something like operate a ferry or a toll bridge. These days, however, the laws governing corporations are more uniform.

“That’s just not how corporations operate in the modern world,” Smith said.

Smith added that he suspects the court will see this law as conditioning the creation of a corporation, or similar artificial person, on forfeiting the right of the people forming a corporation to political speech in the form of spending.

“You could not have the state say we’re going to allow you to register your home, but only if you agree that you won’t spend any money from your home equity line of credit on any kind of political activity,” Smith said. “You can’t deny people the benefits of the law based on a determination that they give up some type of constitutional rights.”

Notably, under Hawaii’s law, the people who form corporations are still allowed to engage in political spending; it’s just that the artificial person in question is disallowed. Still, Smith said, he believes the court will still see the law as unconstitutional.

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What’s clear is that this new law, or one like it, will likely be headed to the Supreme Court and that’s because there are already other states where people are mobilizing to create similar laws.

Jeff Mangan, the founder and president of the Transparent Election Initiative, is already spearheading an effort to get a similar statute on the ballot in Montana in 2026, telling Salon that the group is only about 1,000 signatures away from meeting the petition requirements, with four weeks left.

“It’s an all-volunteer effort in Montana, we don’t have any paid signature gatherers, and it’s something that hasn’t been seen in a couple of decades here,” Mangan said.

While election finance reform is typically seen as a progressive issue, Mangan said that the initiative has been well-received by Montanans of all political leanings and that he’s optimistic that the measure will pass, though he’s expecting a significant political battle once the ballot measure is approved.

“We start with a very simple question: Do you believe there’s too much money in politics?” Mangan said. “Citizens will say ‘Yes,’ and they may not agree exactly what the solution is, but we can all agree that there’s too much money in politics.”

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Mangan acknowledged that the law, if passed in Montana, would be limited in that it only addresses dark money, which is a relatively small portion of political spending. While 2024 saw nearly $2 billion in dark money spent, it saw some $15 billion in outside political spending, according to the election spending watchdog OpenSecrets. Still, Mangan said, he’s already had organizers in all 50 states reach out expressing interest in the project and in starting similar efforts in their home states.

The Montana measure has also already survived a legal challenge at the Montana Supreme Court, which makes organizers optimistic that the law will survive a federal challenge. The court ruled that the law was not an infringement of rights because the law “speaks only to powers, not rights, and it does not expressly revoke any constitutional rights.”

Still, Mangan expects that his group and the supporters of the measure will have to fight tooth and nail to get the bill passed via referendum if and when it appears on the ballot in November.

“It’ll certainly be a David versus Goliath battle. They’ve already started. The Chamber of Commerce and industry groups attempted to stop the initiative right at the beginning of the signature-gathering phase. They sued the state to stop us from gathering signatures. They were unsuccessful,” Mangan said. “We expect litigation at every step of the way through this, not to mention whatever political campaign they choose to throw at us, and I would imagine it’ll be expensive and immense. It almost makes our point. Exactly the reason we need the Montana plan is because of exactly what we’re seeing being thrown against us.”






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