Someday between 16 and 11.6 million years in the past, a younger caiman stumbled on a tasty snack in modern-day South America. The meal, nevertheless, turned out to be reasonably bold, as a result of the croc hadn’t come across simply any previous prey. It was a phorusrhacid, a big carnivore in its personal proper, aptly often known as a “terror fowl.” The now-extinct terror fowl wouldn’t have given in with no battle—except, in fact, it was already useless, and the opportunistic croc merely scavenged its useless physique. That doesn’t appear to be the case, nevertheless. The assembly of the 2 apex predators performed out, and all that’s left of it in the present day is a handful of puncture wounds on a fossilized bone relationship again to the Center Miocene Epoch. For paleontologists, it’s providing uncommon insights right into a prehistoric feeding interplay between two formidable however very totally different beasts. An enormous caiman left chew marks on a terror fowl bone tens of thousands and thousands of years in the past. © Andres Hyperlink, et al., 2025. “Proof of direct trophic [feeding] interactions between apex predators stays as a subject that has been traditionally understudied,” researchers wrote in a examine reconstructing the encounter, revealed Wednesday within the journal Biology Letters. “Prey is most frequently represented by herbivores and different animals that aren’t on the highest of the trophic internet,” i.e. non-apex predators, in keeping with the examine. This anecdotal account of an “aquatic apex predator feeding on a terrestrial apex predator” provides to our understanding of how advanced meals webs may be in each fashionable and historical vertebrate ecosystems,” the scientists wrote. To analyze the prehistoric showdown, the researchers scanned the beforehand recognized terror fowl fossil to create a digital mannequin of the puncture wounds. They then turned the tooth marks into negatives to check them to the tooth of crocodyliforms (a gaggle of predatory reptiles together with crocodiles, alligators, and caimans) from La Venta, the fossil hotspot in Colombia the place the specimen originates.
The caiman could have scavenged on the already useless physique of the phobia fowl. © Julián Bayona “Comparisons with specimens of [modern] black caiman, Melanosuchus niger, recommend that the traces had been possible inflicted by a big caimanine, between 4.6 and 4.8 m [15.1 to 17.7 feet] lengthy,” defined the researchers, together with College of the Andes’ biologist Andres Hyperlink. “Within the present fossil assemblage of La Venta, the most effective match for a big caiman on this measurement vary could be a juvenile or subadult specimen of the enormous caimanine P. neivensis, the most important crocodyliform within the La Venta Fauna.” As a result of the chew marks on the phobia fowl bone don’t present indicators of therapeutic, the fowl possible didn’t survive the Purussaurus neivensis’ assault, or was already useless. The examine finally sheds mild on an interplay between “among the most emblematic apex predators within the Miocene of South America,” suggesting that giant phorusrhacids could have had extra to fret about than researchers beforehand thought.
