Metascience, Год журнала: 2023, Номер 33(1), С. 131 - 134
Опубликована: Ноя. 6, 2023
Язык: Английский
Proceedings of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 291(2015)
Опубликована: Янв. 17, 2024
Teeth evolved early in vertebrate evolution, and their morphology reflects important specializations diet ecology among species. The toothless jaws (edentulism) extant birds likely coevolved with beak keratin, which functionally replaced teeth. However, extinct dinosaurs lost teeth multiple times independently exhibited great variation toothrow distribution rhamphotheca-like keratin structures. Here, we use rostral jawbone surface texture as a proxy for covering phylogenetic comparative models to test the influence of on Mesozoic dinosaurs. We find that evolution explains partial reduction but not jaw toothlessness. Toothrow preceded cover theropods. Non-theropod continuous toothrows despite evolving covers (e.g. some ornithischians sauropodomorphs). also show did significantly increase evolutionary rate tooth loss, further delineates antagonistic relationship between these Our results suggest had limited effect suppressing development. Independent changes development may have facilitated loss. Furthermore, strong chemical digestion, gizzard, dietary shift omnivory or herbivory alleviated selective pressures
Язык: Английский
Процитировано
3
Paleontological Journal, Год журнала: 2024, Номер 58(1), С. 1 - 19
Опубликована: Фев. 1, 2024
Язык: Английский
Процитировано
3
Journal of the Mechanics and Physics of Solids, Год журнала: 2025, Номер unknown, С. 106167 - 106167
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Cretaceous Research, Год журнала: 2023, Номер 154, С. 105769 - 105769
Опубликована: Ноя. 2, 2023
Cretaceous (non-avian) theropod dinosaurs from Australia are poorly understood, primarily because almost all specimens described thus far comprise isolated postcranial elements. In Australia, only three non-dental cranial elements pertaining to Theropoda have been reported: the left and right dentaries of Australovenator wintonensis Winton Formation (Cenomanian–lowermost Turonian) Queensland, an surangular Eumeralla (lower Albian) Victoria. Herein, we report first evidence non-mandibular material a non-avian Australia: frontal fused parietal fragment Lower Aptian) upper Strzelecki Group The specimen shares several synapomorphies with frontals assigned Megaraptoridae, including anteroposteriorly elongate postorbital articulation truncated nasal articular surface. Accordingly, regard this as Megaraptoridae gen. et sp. indet. We performed both parsimony-based Bayesian-based phylogenetic analyses support our assignment, placement within Megaraptoridae. However, appears possess plesiomorphic characters relative other megaraptorid frontals, lacking dorsoventrally high walls bone that emarginate prefrontal surfaces. plesiomorphies implications for evolution megaraptoran skull roof, suggesting acquisition specialised adaptations longirostry over time. This improves limited record Australian remains, provides hypothesis might originated in Australia.
Язык: Английский
Процитировано
4
Comptes Rendus Palevol, Год журнала: 2024, Номер 23(10)
Опубликована: Фев. 26, 2024
Abstract text
Процитировано
0
Палеонтологический журнал, Год журнала: 2024, Номер 1, С. 3 - 23
Опубликована: Ноя. 7, 2024
Among the early archosaurs, various ecological types are represented – from predators to herbivores, terrestrial semi-aquatic forms. A special place among them is occupied by family Ornithosuchidae, which traditionally considered as active predators. The unique structure of jaw apparatus and morphology postcranial skeleton Ornithosuchidae indicate formation in only type archosaurs a hyperanisodont macrophagous predator. At same time, some analogies can be noted between ornithosuchids saber-toothed therapsids mammals.
Язык: Английский
Процитировано
0
Опубликована: Дек. 11, 2024
Процитировано
0
Nature, Год журнала: 2023, Номер 616(7955), С. 19 - 19
Опубликована: Март 30, 2023
Язык: Английский
Процитировано
0
National Science Review, Год журнала: 2023, Номер 10(12)
Опубликована: Окт. 14, 2023
Taking the motion reconstruction of Cretaceous hell ants as an example, this study shows how to achieve in fossil invertebrates and discusses potential challenges opportunities.
Язык: Английский
Процитировано
0
Metascience, Год журнала: 2023, Номер 33(1), С. 131 - 134
Опубликована: Ноя. 6, 2023
Язык: Английский
Процитировано
0