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15 de may. de 2024 · Here, we describe an exceptional fossil of an articulated six-armed brittle star from the Late Jurassic of Germany, showing one body half in the process of regeneration, and assign it to the new species Ophiactis hex sp. nov. Phylogenetic inference shows that the fossil represents the oldest member of the extant family Ophiactidae.
Hace 6 días · Ammolite is an iridescent gem stone made from the shells of fossil ammonites. The Triassic ammonites Arcestes intuslabiatus (top) and A. binacostomus (bottom), from what is now Austria. Reconstruction of Annuloceras summersi. Asteroceras, a Jurassic ammonite from England. Abbasites. Abichites. Abrytasites. Acanthaecites. Acanthinites. Acanthoceras.
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- Misterios Prehistóricos
Hace 5 días · Ammonite Fossils. Fossils of ammonites are found worldwide and provide valuable information about Earth's history. 11 Ammonite fossils are commonly found in sedimentary rocks like limestone and shale. 12 These fossils help scientists date the rocks in which they are found, a process known as biostratigraphy.
14 de may. de 2024 · De aquella manera, la joven paleontóloga quedaba apartada por completo del mundo académico a pesar de haber sido ella la descubridora del fósil, un fósil que sería vendido por veintitrés irrisorias libras. Mary siguió incansable con la búsqueda de nuevos fósiles, y algunos de los más importantes llegarían en el año 1823.
7 de may. de 2024 · Una vez en el lugar, confirmaron que la piedra contenía un fósil, específicamente vértebras articuladas. "Como está tan completo este individuo, podemos tener elementos anatómicos que entreguen información valiosa del ordenamiento de los elasmosaurios del extremo sur del mundo", dijo a la Voz de América el paleontólogo ...
21 de may. de 2024 · Ammonites were an important group of marine mollusks that were numerous in the Earth's oceans for 360 million years, from about 425 million years ago, during the Silurian period, to 65.5 million years ago, when they went extinct along with the dinosaurs and many other clades. Ammonites were cephalopods, most closely related to living octopus ...
