nouvelle espèce

Thématique

5 image(s) · 44 Actualités

Galerie d'images

Life restoration of the small German Jurassic ichthyosaur Hauffiopteryx typicus.
References
Maxwell, E. E.; Cortés, D. (2020). "A revision of the Early Jurassic ichthyosaur Hauffiopteryx (Reptilia: Ichthyosauria), and description of a new species from Southwestern Germany". Palaeontologia Electronica 23: 1–43. Archived from the original on 2022-07-06. Retrieved on 2022-03-15.
Note: This image is currently uncolored
Taxons Hauffiopteryx

Life restoration of the small German Jurassic ichthyosaur Hauffiopteryx typicus. References Maxwell, E. E.; Cortés, D. (2020). "A revision of the Early Jurassic ichthyosaur Hauffiopteryx (Reptilia: Ichthyosauria), and description of a new species from Southwestern Germany". Palaeontologia Electronica 23: 1–43. Archived from the original on 2022-07-06. Retrieved on 2022-03-15. Note: This image is currently uncolored

description Allemagne Jurassique inférieur Jurassique +3
Life restoration of the Triassic ichthyosaur Callawayia neoscapularis. Three specimens of this ichthyosaur are known, the holotype, ROM 41993, and two referred specimens, TMP 94.380.11 and 94.382.2. The skull is primarily based on ROM 41993, cross-checked against TMP 94.380.11 and TMP 94.382.2. The vertebral column is based primarily on TMP 94.382.2 as it is the most complete of these specimens, while the ribs were based on ROM 41993. The forelimbs were mainly based on those of ROM 41993, with TMP 94.380.11 used to determine their breadth. The hindlimbs were based on TMP 94.380.11, especially the more complete right hindlimb.
ROM 41993 was cross-scaled with TMP 94.380.11 by the dimensions of the forelimb epipodials, which produced similar vertebral dimensions. The two TMP specimens were cross-scaled based on femoral length, also producing similar vertebral dimensions. Nicholls & Manabe (2001) stated that no wedge-shaped caudal centra supporting a tailbend were found and that there was no evidence of a bend being present, though considered that they might have existed in the gap in the preserved caudals. Since various other Triassic ichthyosaurs have since been found to have tail bends, one was illustrated here. A modest downturn of roughly 15° was illustrated, comparable to that in Guanlingsaurus, and the location of the bend within the gap in the preserved vertebrae matches well with the location of the bend in Guizhouichthyosaurus.

References
McGowan, C. (1994). "A new species of Shastasaurus (Reptilia: Ichthyosauria) from the Triassic of British Columbia: The most complete exemplar of the genus". Journal of Vertebrate Paleontology 14 (2): 168–179. DOI:10.1080/02724634.1994.10011550.
Nicholls, E. L.; Manabe, M. (2001). "A new genus of ichthyosaur from the Late Triassic Pardonet Formation of British Columbia: Bridging the Triassic-Jurassic gap". Canadian Journal of Earth Sciences 38 (6): 983–1002.
Ji, C.; Jiang, D.Y.; Hao, W.; Sun, Y. (2011). "True tailbend occurred in the Late Triassic: Evidence from ichthyosaur skeletons of South China". Acta Scientiarum Naturalium Universitatis Pekinensis 47 (2): 309–314.
Shang, Q. H.; Li, C. (2009). "On the occurrence of the ichthyosaur Shastasaurus in the Guanling biota (Late Triassic), Guizhou, China". Vertebrata PalAsiatica 47 (3): 178–193.
Taxons Guanlingsaurus

Life restoration of the Triassic ichthyosaur Callawayia neoscapularis. Three specimens of this ichthyosaur are known, the holotype, ROM 41993, and two referred specimens, TMP 94.380.11 and 94.382.2. The skull is primarily based on ROM 41993, cross-checked against TMP 94.380.11 and TMP 94.382.2. The vertebral column is based primarily on TMP 94.382.2 as it is the most complete of these specimens, while the ribs were based on ROM 41993. The forelimbs were mainly based on those of ROM 41993, with TMP 94.380.11 used to determine their breadth. The hindlimbs were based on TMP 94.380.11, especially the more complete right hindlimb. ROM 41993 was cross-scaled with TMP 94.380.11 by the dimensions of the forelimb epipodials, which produced similar vertebral dimensions. The two TMP specimens were cross-scaled based on femoral length, also producing similar vertebral dimensions. Nicholls & Manabe (2001) stated that no wedge-shaped caudal centra supporting a tailbend were found and that there was no evidence of a bend being present, though considered that they might have existed in the gap in the preserved caudals. Since various other Triassic ichthyosaurs have since been found to have tail bends, one was illustrated here. A modest downturn of roughly 15° was illustrated, comparable to that in Guanlingsaurus, and the location of the bend within the gap in the preserved vertebrae matches well with the location of the bend in Guizhouichthyosaurus. References McGowan, C. (1994). "A new species of Shastasaurus (Reptilia: Ichthyosauria) from the Triassic of British Columbia: The most complete exemplar of the genus". Journal of Vertebrate Paleontology 14 (2): 168–179. DOI:10.1080/02724634.1994.10011550. Nicholls, E. L.; Manabe, M. (2001). "A new genus of ichthyosaur from the Late Triassic Pardonet Formation of British Columbia: Bridging the Triassic-Jurassic gap". Canadian Journal of Earth Sciences 38 (6): 983–1002. Ji, C.; Jiang, D.Y.; Hao, W.; Sun, Y. (2011). "True tailbend occurred in the Late Triassic: Evidence from ichthyosaur skeletons of South China". Acta Scientiarum Naturalium Universitatis Pekinensis 47 (2): 309–314. Shang, Q. H.; Li, C. (2009). "On the occurrence of the ichthyosaur Shastasaurus in the Guanling biota (Late Triassic), Guizhou, China". Vertebrata PalAsiatica 47 (3): 178–193.

Chine Jurassique Trias supérieur Trias +12
New species of Mesozoic benthic foraminifera from the former British Petroleum micropalaeontology collection, Ophthalmidium dracomaris n. sp.
(1) holotype (NHMUK PM PF 74496); (2–5) paratypes (NHMUK PM PF 74497–74500). (8–9) Eobigenerina calloviensis n. sp.: (8) holotype (NHMUK PM PF 74504); (9) paratype (NHMUK PM PF 74505). (10–12) Trochammina fordonensis n. sp.: (10) holotype (NHMUK PM PF 74501); (11–12) paratype (NHMUK PM PF 74502–74503). (13–15) Arenoturrispirillina swiecickii n. sp.: (13) holotype (NHMUK PM PF 74506); (14–15) paratype (NHMUK PM PF 74507 + NHMUK PM PF 74552). (16–17) Ataxophragmium mariae n. sp.: (16) holotype (NHMUK PM PF 74553); (17) paratype (NHMUK PM PF 74554).

New species of Mesozoic benthic foraminifera from the former British Petroleum micropalaeontology collection, Ophthalmidium dracomaris n. sp. (1) holotype (NHMUK PM PF 74496); (2–5) paratypes (NHMUK PM PF 74497–74500). (8–9) Eobigenerina calloviensis n. sp.: (8) holotype (NHMUK PM PF 74504); (9) paratype (NHMUK PM PF 74505). (10–12) Trochammina fordonensis n. sp.: (10) holotype (NHMUK PM PF 74501); (11–12) paratype (NHMUK PM PF 74502–74503). (13–15) Arenoturrispirillina swiecickii n. sp.: (13) holotype (NHMUK PM PF 74506); (14–15) paratype (NHMUK PM PF 74507 + NHMUK PM PF 74552). (16–17) Ataxophragmium mariae n. sp.: (16) holotype (NHMUK PM PF 74553); (17) paratype (NHMUK PM PF 74554).

Mésozoïque holotype nouvelle espèce
A figure from Notes on Osteology of Baptanodon. With a Description of a New Species.
Taxons Baptanodon

A figure from Notes on Osteology of Baptanodon. With a Description of a New Species.

description Baptanodon nouvelle espèce
Muttaburrasaurus
The plants, animals and climate of the Australian continent have changed dramatically over long periods of time. Imagine this giant creature roaming the luxuriant wet forests that covered parts of the continent in the Cretaceous period, about 100-110 million years ago. The Muttaburrasaurus ambled along on all four legs or stood on its hind legs. Its large teeth were well adapted to eat tough vegetation such as the leathery foliage of the evergreen forests of Araucaria trees, ancient relatives of the bunya pine of south-eastern Queensland.
In 1963, grazier Doug Langdon discovered the fossilised bones of a dinosaur on his property near Muttaburra in central-west Queensland. It was one of the most complete dinosaur skeletons found in Australia. The bones belonged to a new species of ornithopod and palaeontologists named it Muttaburrasaurus langdoni.

Cast of Muttaburresaurus langdoni 1987 made by Queensland Museum, Brisbane National Museum of Australia
Taxons Muttaburrasaurus

Muttaburrasaurus The plants, animals and climate of the Australian continent have changed dramatically over long periods of time. Imagine this giant creature roaming the luxuriant wet forests that covered parts of the continent in the Cretaceous period, about 100-110 million years ago. The Muttaburrasaurus ambled along on all four legs or stood on its hind legs. Its large teeth were well adapted to eat tough vegetation such as the leathery foliage of the evergreen forests of Araucaria trees, ancient relatives of the bunya pine of south-eastern Queensland. In 1963, grazier Doug Langdon discovered the fossilised bones of a dinosaur on his property near Muttaburra in central-west Queensland. It was one of the most complete dinosaur skeletons found in Australia. The bones belonged to a new species of ornithopod and palaeontologists named it Muttaburrasaurus langdoni. Cast of Muttaburresaurus langdoni 1987 made by Queensland Museum, Brisbane National Museum of Australia

os musée Australie Crétacé +5

Actualités

Ce crocodile courait comme un lévrier à travers la Grande-Bretagne préhistorique il y a 200 millions d'années.
Royaume-Uni Trias fossile nouvelle espèce
Un reptile du Trias récemment découvert au Royaume-Uni ressemblait plus à un lévrier de course qu'à un crocodile, construit pour la vitesse sur terre. Doté de longues pattes et d'un corps léger, il chassait les petits animaux dans un environnement sec et montagneux il y a des millions d'années. Les scientifiques l’ont identifié comme une nouvelle espèce après avoir repéré des différences clés dans ses fossiles. C’est aussi un hommage à un professeur inspirant qui a contribué à éveiller la curiosité d’un futur scientifique.
21/03/2026 sciencedaily ⚙ Traduction automatique
Un fossile légendaire oblige les scientifiques à repenser les origines humaines
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L'un des fossiles d'ancêtres humains les plus complets jamais découverts pourrait appartenir à une espèce entièrement nouvelle, selon une équipe de recherche internationale. Le célèbre squelette du « Little Foot » d’Afrique du Sud a longtemps été débattu, mais de nouvelles analyses suggèrent qu’il ne correspond vraiment à aucune espèce d’australopithèque connue. Au lieu de cela, les chercheurs affirment que son mélange unique de caractéristiques pointe vers un parent humain jusqu’alors non identifié, remodelant les idées sur la diversité humaine primitive.
05/01/2026 sciencedaily-human-evo ⚙ Traduction automatique
Un mini-prédateur vieux de 242 millions d'années change l'évolution du lézard
membre dent prédateur fossile évolution nouvelle espèce crâne
Un minuscule fossile du Devon vieux de 242 millions d’années bouleverse les hypothèses des scientifiques sur les premiers membres de la lignée des lézards. Au lieu des charnières du crâne et des dents du palais typiques des lézards et des serpents modernes, cette ancienne créature présente un mélange surprenant de traits primitifs et inhabituels, ainsi que des dents étonnamment grandes en forme de lame. Les scans synchrotron haute résolution ont révélé des détails invisibles à l'œil nu, aidant ainsi les chercheurs à nommer la nouvelle espèce Agriodontosaurus helsbypetrae
30/11/2025 sciencedaily ⚙ Traduction automatique
Avant le T. rex, il y avait le « prince dragon »
migration prédateur Dinosauria Khankhuuluu Tyrannosaurus découverte nouvelle espèce
Les scientifiques ont dévoilé Khankhuuluu, une nouvelle espèce de dinosaure mongol qui est antérieure et ressemble beaucoup aux premiers tyrannosaures. Avec son long museau, ses petites cornes et sa silhouette élancée, il représente une forme de transition entre les prédateurs rapides de taille moyenne et les chasseurs géants comme le T. rex. La découverte suggère également que les grands tyrannosaures ont évolué pour la première fois en Amérique du Nord à la suite d'une ancienne migration en provenance d'Asie.
24/10/2025 sciencedaily-human-evo ⚙ Traduction automatique
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