An unspoiled skeleton of a fossil frog from the Geiseltal Collection. By studying the bones of the fossil frogs, the UCC team was able to narrow down the options. “As far as we can inform, the fossil frogs were healthy when they passed away, and the bones dont show any indications of scavengers or predators– theres likewise no evidence that they were washed in during floods, or died due to the fact that the swamp dried up,” said UCC scientist and research study leader Daniel Falk. Whats more, most of the Geiseltal fossil frogs are types that invest their lives on land, returning to the water only to breed. “Whats really fascinating is that fossil frogs from other websites also show these functions, recommending that the breeding habits of modern frogs are really rather ancient and have been in place for at least 45 million years”.
According to earlier research study, the Geiseltal frogs died when lakes dried up or the waters oxygen levels dropped. Up until today, it was unclear precisely what eliminated these creatures.
The frog skeleton shows extraordinary high completeness and expression (false colors). Credit: D. Falk
“As far as we can tell, the fossil frogs were healthy when they died, and the bones do not show any indications of predators or scavengers– theres likewise no proof that they were washed in during floods, or passed away due to the fact that the swamp dried up,” stated UCC scientist and research study leader Daniel Falk. Whats more, many of the Geiseltal fossil frogs are types that spend their lives on land, returning to the water just to breed.
The taphonomy of the Geiseltal frogs at a look. Credit: D. Falk
This phenomenon is typical in frogs today. “Female frogs are at greater risk of drowning as they are typically immersed by one or more males– this typically occurs in types that take part in breeding churchgoers throughout the brief explosive breeding season,” stated senior author Professor Maria McNamara. “Whats truly fascinating is that fossil frogs from other sites likewise reveal these functions, recommending that the breeding habits of contemporary frogs are really quite ancient and have remained in location for at least 45 million years”.
Reference: “The skeletal taphonomy of anurans from the Eocene Geiseltal Konservat-Lagerstätte, Germany: insights into the controls on fossil anuran conservation” by Daniel Falk, Oliver Wings and Maria E. McNamara, 5 July 2022, Papers in Palaeontology.DOI: 10.1002/ spp2.1453.
These findings are amongst the first brand-new discoveries to come to light following the reopening of the famous Geiseltal fossil collections of the “Zentralmagazin Naturwissenschaftlicher Sammlungen (ZNS)” in Halle (Saale), Germany to the public. The research study becomes part of a research study cooperation in between UCC and Martin-Luther-University Halle-Wittenberg with funding from the Irish Research Council..
A well-preserved skeleton of a fossil frog from the Geiseltal Collection. The frog likely died throughout breeding in an overload environment and got into two pieces due to currents on the lake bottom. Credit: D. Falk
For fossil frogs, an ancient overload is a sex death trap.
Paleontologists at University College Cork (UCC) have actually determined why numerous fossil frogs in a prehistoric swamp died 45 million years ago while mating.
Over 50,000 prehistoric animals died in the watery death trap in the Geiseltal region of main Germany, including birds, horses, bats, fish, and hundreds of frogs. The former coalfield of Geiseltal in Saxony-Anhalt is regarded as a scientific treasure trove since of its distinctive geological characteristics and varieties of fossils, providing a distinct view into how the Earths greenery and animals developed over countless years.
Daniel Falk examines Geiseltal frogs, that passed away around 45 million years back. The fossil frogs are saved in the Natural Sciences Collections, Halle (Saale), Germany. Credit: D. Falk
Nearly 50 million years earlier, during the middle Eocene, when Earth was considerably warmer, the area of Geiseltal was a swampy subtropical forest home to anurans, or toads and frogs, along with big crocodiles, enormous snakes, lizards, ground-dwelling birds, and progenitors of the horse.
