Ny jättelik dinosaurieart har grävts fram i Patagonien

12 maj 2026

Rapporterad av AI

Forskare har beskrivit en tidigare okänd sauropod-dinosaurie från fossil som hittats i provinsen Chubut i Argentina. Varelsen, som fått namnet Bicharracosaurus dionidei, blev omkring 20 meter lång och levde för ungefär 155 miljoner år sedan.

Forskare har funnit mer än 30 kotor, flera revben och en del av bäckenet från bergformationen Cañadón Calcáreo. Benen tillhörde ett vuxet djur och uppvisar en blandning av egenskaper som ses hos både brachiosaurider och diplodocider. Alexandra Reutter, studiens huvudförfattare och doktorand vid LMU, ledde analysen av lämningarna som nu förvaras på Museo Paleontológico Egidio Feruglio i Trelew.

Relaterade artiklar

Virginia Tech student reconstructs rare dinosaur skull revealing new species

A crushed dinosaur fossil, long forgotten in a drawer, has been reconstructed by a Virginia Tech undergraduate, unveiling a new species of early carnivorous dinosaur. The specimen, named Ptychotherates bucculentus, belonged to the Herrerasauria group and lived near the end of the Triassic period. Its discovery suggests this ancient dinosaur lineage persisted until the end-Triassic extinction.

Tiny dinosaur fossil weighs less than a chicken

25 februari 2026 Rapporterad av AI

A nearly complete skeleton of a small predatory dinosaur discovered in Argentina has revealed new details about the evolution of alvarezsaurs. The 95-million-year-old Alnashetri cerropoliciensis weighed just 700 grams and challenges previous ideas about their anatomy and diet. Researchers suggest it had a broader range of prey than previously thought.

Vetenskap

Dinosaur tracks from 132 million years ago discovered near Knysna

Vetenskap

Paleontologists discover 275-million-year-old twisted-jaw species

Miljö

Lost fossils reveal diverse marine predators after Permian extinction

Ancient reptile shifted from four legs to two as it matured

A newly described crocodile relative from the Late Triassic period began life walking on four legs before adopting a bipedal stance in adulthood, scientists say. The poodle-sized Sonselasuchus cedrus, unearthed in Arizona, reveals unusual growth patterns in ancient reptiles. Researchers detailed the findings in a study published this year.

Nanotyrannus confirmed as distinct species from T. rex

16 april 2026 Rapporterad av AI

Scientists have determined that Nanotyrannus was a mature, separate species rather than a juvenile Tyrannosaurus rex. A new study analyzed a tiny throat bone from the original fossil, revealing growth patterns indicating adulthood. The findings, published in Science, challenge decades of debate over the dinosaur's identity.

Vetenskap