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129,000 years of crocodiles: What we know about Australasia's ancient apex predators

Phys · · 893 words · By Jorgo Ristevski; Julien Louys; Nicole Boivin
Environmental Conservation Paleontology and Extinction Human-Wildlife Interaction

The article discusses a review of crocodylian remains in Australasia over the last 129,000 years, highlighting the difference between modern saltwater crocodiles and the extinct mekosuchines. It examines the interaction between these predators and early humans, noting the survival of some species on islands and the eventual extinction of others.

open_in_new Read the original article: https://phys.org/news/2026-05-years-crocodiles-australasia-ancient-apex.html

analyticsAnalysis

20%
Propaganda Score
confidence: 95%
Minor concerns. Some persuasive language detected, but largely factual.

psychologyDetected Techniques

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

15 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5
schedule Pending 5
info Single Source 3
verified Verified 1
help Insufficient Evidence 1
verified
“Our recent review of evidence from the past 129,000 years published in the Zoological Journal of the Linnean Society reveals a dramatic story of extinctions, human encounters, and survival against the odds.”
VERIFIED
Web search results explicitly quote the text regarding a record of crocodylians over the past 129,000 years and confirm the existence of the Zoological Journal of the Linnean Society via Wikipedia.
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wikipedia NEUTRAL — Journal of the Linnean Society is a series of specialised journals published by the Linnean Society of London: Biological Journal of the Linnean Society Botanical Journal of the Linnean Society Zoolo…
https://en.wikipedia.org/wiki/Journal_of_the_Linnean_Society
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wikipedia NEUTRAL — The Zoological Journal of the Linnean Society is a monthly peer-reviewed scientific journal covering zoology published by Oxford University Press on behalf of the Linnean Society. The editor-in-chief …
https://en.wikipedia.org/wiki/Zoological_Journal_of_the_Linn…
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wikipedia NEUTRAL — The Zoological Society of London (ZSL) is a charity and organization devoted to the worldwide conservation of animals and their habitats. It was founded in 1826. Since 1828, it has maintained London Z…
https://en.wikipedia.org/wiki/Zoological_Society_of_London
+ 3 more evidence sources
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“Modern crocodiles are members of the genus Crocodylus, but an entirely different group of crocodylians known as mekosuchines once dominated the region.”
CORROBORATED
Both Wikipedia (Mekosuchinae) and the web search result '129,000 years of crocodiles' confirm that modern crocodiles are Crocodylus and that mekosuchines were a different group that dominated the region.
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web search NEUTRAL — Mekosuchine crocodiles are a diverse group displaying a great variety of shapes and sizes. Some taxa, like Baru and Paludirex, were large semi-aquatic ambush hunters, though the two genera likely diff…
https://en.wikipedia.org/wiki/Mekosuchinae
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web search NEUTRAL — Modern crocodiles are members of the genus Crocodylus, but an entirely different group of crocodylians known as mekosuchines once dominated the region. For more than 50 million years, mekosuchines wer…
https://phys.org/news/2026-05-years-crocodiles-australasia-a…
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web search NEUTRAL — Modern croc species look so similar not because of conserving ancient traits, but because crocodiles are evolving the same skull shapes over and over again through time.
https://www.smithsonianmag.com/science-nature/modern-crocodi…
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“For more than 50 million years, mekosuchines were the apex predators of Australasia.”
CORROBORATED
The claim is explicitly stated in 'The Conversation' and '129,000 years of crocodiles', and supported by Wikipedia's description of Mekosuchinae as the dominant group in the region during most of the Cenozoic.
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wikipedia NEUTRAL — Kambara is an extinct genus of mekosuchine crocodylian that lived during the Eocene epoch in Australia. It is generally thought to have been a semi-aquatic generalist, living a lifestyle similar to ma…
https://en.wikipedia.org/wiki/Kambara
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wikipedia NEUTRAL — Mekosuchinae is an extinct clade of crocodilians from the Cenozoic of Australasia. They represented the dominant group of crocodilians in the region during most of the Cenozoic, first appearing in the…
https://en.wikipedia.org/wiki/Mekosuchinae
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wikipedia NEUTRAL — Quinkana is an extinct genus of mekosuchine crocodylians that lived in Australia from about 25 million to about 20,000 years ago, with the majority of fossils having been found in Queensland. Four spe…
https://en.wikipedia.org/wiki/Quinkana
+ 4 more evidence sources
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“Some [mekosuchines] were giant semi-aquatic ambush predators... Others were much smaller "dwarf" species that inhabited islands such as New Caledonia.”
CORROBORATED
Wikipedia mentions large semi-aquatic hunters like Baru, and a PDF regarding Vanuatu/New Caledonia specifically describes small, possibly terrestrial/island-dwelling mekosuchines.
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web search NEUTRAL — The Lapita people inhabited large parts of Melanesia and Polynesia, including islands that were home to the last mekosuchines. While mainland mekosuchines died out during the Pleistocene, isolated ins…
https://en.wikipedia.org/wiki/Mekosuchinae
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web search NEUTRAL — As with mekosuchine species in New Caledonia and Fiji, Mekosuckus kalpokasi sp. nov. was a small, possibly terrestrial carnivore that is now extinct. The differences between the Efate specimen and pre…
https://www.researchgate.net/publication/278348316_New_Extin…
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web search NEUTRAL — Quinkana babarra, a new species of ziphodont mekosuchine crocodile from the Early Pliocene Bluff Downs Local Fauna, northern Australia with a revision of the genus. Proceedings of the Linnean Society …
https://scienceblogs.com/tetrapodzoology/2009/05/13/mekosuch…
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“some species possessed blade-like serrated teeth and probably hunted their prey on land.”
CORROBORATED
The Conversation and a web search result specifically mention the genus Quinkana having 'blade-like serrated teeth' and hunting on land.
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web search NEUTRAL — Species of Baru are among the largest and most robust mekosuchines, bearing heavily built skulls with large and finely crenulated teeth. Having reached lengths upwards of 4 m (13 ft), they were the ap…
https://en.wikipedia.org/wiki/Mekosuchinae
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web search NEUTRAL — having some dentary teeth interfingering with. teeth in the maxillary row (a complete overbite. was present in M. inexpectatus).have provided potential dispersal routes into. the South Pacific for tro…
https://www.researchgate.net/publication/278348316_New_Extin…
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web search NEUTRAL — mekosuchines was Quinkana, with its altirostral (deep) skull and blade-like serrated teeth. There is some question around the lifestyle of mekosuchines.
https://www.fan-edu.com.br/45256827/troundi/fniches/jassistu…
+ 1 more evidence source
info
“We pieced together a record of crocodylians over the past 129,000 years from scattered and highly fragmentary remains recovered from more than 20 archaeological and paleontological sites.”
SINGLE SOURCE
The specific detail about 'more than 20 archaeological and paleontological sites' is only found in the source '129,000 years of crocodiles'. Other sources discuss crocodylians generally but not this specific dataset compilation.
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wikipedia NEUTRAL — Crocodilia () is an order of semiaquatic, predatory reptiles that are known as crocodilians. They appeared 83.5 million years ago in the Late Cretaceous period (Campanian stage) and are the closest li…
https://en.wikipedia.org/wiki/Crocodilia
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wikipedia NEUTRAL — Deinosuchus is an extinct genus of eusuchian, either an alligatoroid crocodilian or a stem-group crocodilian, which lived during the Late Cretaceous around 82 to 73 million years ago. The first remain…
https://en.wikipedia.org/wiki/Deinosuchus
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wikipedia NEUTRAL — The proatlas is a paired bone in the skeleton of some living and many extinct terrestrial vertebrates (tetrapods) that occurs between the skull and the atlas, the first cervical vertebra. It ossifies …
https://en.wikipedia.org/wiki/Proatlas
+ 3 more evidence sources
info
“At archaeological sites on the Australian mainland, as well as in the Torres Strait and New Guinea, researchers have uncovered the broken bones and teeth of modern crocodile species”
SINGLE SOURCE
While Wikipedia confirms the presence of modern crocodiles in New Guinea and Australia, the specific claim about finding 'broken bones and teeth' at archaeological sites in the Torres Strait and mainland is only explicitly detailed in the '129,000 years of crocodiles' source.
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wikipedia NEUTRAL — Aboriginal Australians are the various indigenous peoples of the Australian mainland and many of its islands, excluding the ethnically distinct people of the Torres Strait Islands. Humans first migrat…
https://en.wikipedia.org/wiki/Aboriginal_Australians
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wikipedia NEUTRAL — The history of Indigenous Australians began 50,000 to 65,000 years ago when humans first populated the Australian continent. This article covers the history of Aboriginal Australian and Torres Strait …
https://en.wikipedia.org/wiki/History_of_Indigenous_Australi…
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wikipedia NEUTRAL — Indigenous Australian art includes art made by Aboriginal Australians and Torres Strait Islanders, including collaborations with others. It includes works in a wide range of media including painting o…
https://en.wikipedia.org/wiki/Indigenous_Australian_art
+ 3 more evidence sources
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“Ancient rock art, some dating back around 20,000 years, reveals that Indigenous Australians were closely observing and depicting these animals for millennia.”
CORROBORATED
The claim is explicitly stated in 'The Conversation' and '129,000 years of crocodiles'. Wikipedia confirms the general existence of ancient Indigenous Australian rock art depicting animals.
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wikipedia NEUTRAL — Indigenous Australians are the various Aboriginal Australian peoples of Australia, and the ethnically distinct people of the Torres Strait Islands. The terms Aboriginal and Torres Strait Islander peop…
https://en.wikipedia.org/wiki/Indigenous_Australians
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wikipedia NEUTRAL — Indigenous Australian art includes art made by Aboriginal Australians and Torres Strait Islanders, including collaborations with others. It includes works in a wide range of media including painting o…
https://en.wikipedia.org/wiki/Indigenous_Australian_art
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wikipedia NEUTRAL — The 2023 Australian Indigenous Voice referendum was a constitutional referendum held on 14 October 2023 in which the proposed Aboriginal and Torres Strait Islander Voice was rejected. Voters were aske…
https://en.wikipedia.org/wiki/2023_Australian_Indigenous_Voi…
+ 4 more evidence sources
help
“Archaeological evidence shows that humans did occasionally eat crocodiles, and sometimes even crafted pendants from their teeth.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to confirm or deny that humans ate crocodiles or made pendants from their teeth.
info
“On mainland Australia, mekosuchines are currently only known from fossils. Most remains date from more than 40,000 years ago.”
SINGLE SOURCE
This specific detail regarding the 40,000-year fossil date for mainland mekosuchines is only mentioned in the '129,000 years of crocodiles' source.
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“the story is different on the islands of New Caledonia, Vanuatu and Fiji. There, some mekosuchine species managed to survive into much more recent times.”
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“The extinct crocs of New Caledonia and Vanuatu were small, reaching less than two meters in length as adults.”
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“the known record of these island mekosuchines ends within a few centuries of human settlement.”
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“In one example from Vanuatu, a mekosuchine limb bone appears to bear the gnaw marks of a rat”
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“Jorgo Ristevski et al, The late Quaternary crocodylian record from Australasia, Zoological Journal of the Linnean Society (2026). DOI: 10.1093/zoolinnean/zlag065”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.