paleontology5.41 min read
Korean Micro-Eggs Reframe the Origins of Birds
16 days ago•Source: Indian Defence Review
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28.46 min•1 month ago
Argentine fossil reshapes alvarezsauroid history, arguing for a Pangaean origin and stable body size
A new Argentine alvarezsauroid, Alnashetri cerropoliciensis, and two northern taxa prompt a major rewrite of alvarezsauroid evolution: phylogenetic analyses place Alnashetri outside the core alvarezsaurids, making South American taxa polyphyletic; biogeographic analyses imply a Pangaean origin with vicariance driving early diversification; and the early-branching position of Alnashetri argues against a universal miniaturization trend, showing body size evolving within a narrow range across the clade.
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New Filter-Feeding Pterosaur Discovered in Santana Group
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Reevaluation of 'Teenage T. rex' Fossil Reveals a New Dinosaur Species
Nature•5 months ago
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Ancient Skye Fossil Blurs Line Between Lizards and Snakes
A well-preserved early parviraptorid fossil from the Middle Jurassic reveals a mosaic of snake-like and primitive squamate features, challenging simple evolutionary models and highlighting complex morphological evolution during early squamate diversification.
Four-Step Evolutionary Process of Mammalian Jaw Joint Unveiled
The article discusses the convergent evolution of diverse jaw joints in mammaliamorphs, supported by fossil data, digital reconstructions, and phylogenetic analysis, highlighting evolutionary adaptations in mammalian jaw structures.
New Megaraptor Species Discovered in Argentina with Crocodile Remains in Its Mouth
A new Maastrichtian megaraptorid dinosaur from Patagonia, Joaquinraptor casali, provides significant insights into megaraptoran morphology, phylogeny, and paleobiology, representing one of the youngest and most complete specimens of its group, and shedding light on their evolutionary relationships and biology.
Ancient Lizard Fossils Reveal Origins and Evolution of Feeding Adaptations
The article describes the discovery of Agriodontosaurus helsbypetrae, the oldest known lepidosaur, which provides new insights into the early evolution of lepidosaur feeding adaptations, skull morphology, and the timing of key evolutionary events in the Triassic period, including the origin of Rhynchocephalia and Lepidosauria.
Ethiopian Fossils Uncover New Insights into Human Evolution and Ancient Hominins
New hominin fossils from Ledi-Geraru, Ethiopia, dating between 3.0 and 2.5 million years ago, reveal the coexistence of early Homo and Australopithecus, challenging previous notions of hominin evolution and diversity in eastern Africa during this period.
Ancient Tools Reveal Mysterious Human Relatives on Sulawesi
The discovery of in situ stone artifacts at Calio in Sulawesi, dated to at least 1.04 million years ago through palaeomagnetic and US-ESR dating, suggests that hominin presence on Sulawesi may have occurred earlier than previously thought, potentially predating the earliest known occupation on Flores and Luzon.
New Head–Trunk Interface Assembly Discovered in Jawless Vertebrate Relatives
The article presents a novel non-destructive synchrotron imaging study of the fossil Norselaspis glacialis, revealing new insights into the head-trunk interface and circulatory system of early vertebrates, bridging features between jawless and jawed vertebrates, and challenging previous reconstructions of its anatomy.
Hiker Uncovers Pre-Dinosaur Ecosystem in Italian Alps
A hiker in the Italian Alps discovered a 280-million-year-old ecosystem, revealing fossilized tracks of prehistoric reptiles, insects, and amphibians from the Permian era. The site, known as "Rock Zero," has provided a wealth of fossils, including plant fragments and raindrop imprints, preserved in fine-grained sediments. This discovery, exposed by melting ice due to rising temperatures, serves as a reminder of the Permian period's rapid global warming and subsequent mass extinction.
"Giga-Goose: Ancient 500-Pound Bird Roamed Australia"
Researchers have studied fossils of Genyornis newtoni, a 500-pound Ice Age bird that went extinct around 45,000 years ago. New findings from South Australia's Lake Callabonna reveal that this bird, nicknamed the 'Giga-Goose,' had a goose-like bill and adaptations for foraging in water, suggesting it lived in semi-aquatic environments. The study, published in Historical Biology, provides new insights into the bird's morphology and ecological niche, although the exact cause of its extinction remains uncertain.
"Ancient Florida Fossil Reveals 10-Million-Year-Old Porcupine Mystery"
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