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您的检索式：作者名="Matthew CLAMANNA"
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| 1 | 保存于含胚胎蛋窝上的窃蛋龙阐明非鸟恐龙的生殖生物学显示文摘近期研究证实许多鸟类特征在这一类群起源之前已递增式出现,但其中一些特征,譬如孵卵行为是否存在于非鸟恐龙当中还存在争议.本文报道了第一个成体位于含胚胎蛋窝之上的非鸟恐龙化石.保存的成体与蛋窝的位置关系、蛋窝内含有发育晚期的胚胎、胚胎的高孵化温度,为窃蛋龙孵卵假说提供了有力证据.更为重要的是,蛋窝内的胚胎处于不同发育阶段,表明窃蛋龙类已经具备了异步孵化这种现生鸟类里较为进步的孵化方式.这些发现证实了主龙类向鸟类演化的支系在生殖生物学上的演化是一个复杂过程,并非一个线性、渐变的过程.非鸟恐龙的某些生殖行为可能是自己所独有的. | 毕顺东 Romain Amiot Claire Peyre de Fabrègues Michael Pittman Matthew CLamanna 余逸伦 余琮煜 杨子睿 张蜀康 赵祺 徐星 | 2021 | Science Bulletin2021，66，9： | 1 |
| 2 | Late Cretaceous non-avian dinosaurs from the James Ross Basin,Antarctica:description of new material,updated synthesis,biostratigraphy,and paleobiogeography显示文摘Although the fossil record of non-avian dinosaurs from the Cretaceous of Antarctica is the poorest of any continent,fossils representing at least five major taxonomic groups(Ankylosauria,early-diverging Ornithopoda,Hadrosauridae,Titanosauria,and Theropoda)have been recovered.All come from Upper Cretaceous(Coniacian–Maastrichtian)marine and nearshore deposits belonging to the Gustav and Marambio groups of the James Ross Basin at the northern tip of the Antarctic Peninsula.The majority of these finds have come from the Campanian–Maastrichtian Snow Hill Island and López de Bertodano formations of James Ross and Vega islands.Given the rarity of Antarctic Cretaceous non-avian dinosaurs,discoveries of any fossils of these archosaurs,no matter how meager,are of significance.Here we describe fragmentary new ornithischian(ankylosaur and ornithopod)material from the upper Campanian–lower Maastrichtian Cape Lamb Member of the Snow Hill Island Formation and the Maastrichtian Sandwich Bluff Member of the López de Bertodano Formation.One of these specimens is considered to probably pertain to the holotypic individual of the early-diverging ornithopod Morrosaurus antarcticus.We also provide an up-to-date synthesis of the Late Cretaceous non-avian dinosaur record of the James Ross Basin and analyze the biostratigraphic occurrences of the various finds,demonstrating that most(including all named taxa and all reasonably complete skeletons discovered to date)occur within a relatively condensed temporal interval of the late Campanian to early Maastrichtian.Most or all James Ross Basin dinosaurs share close affinities with penecontemporaneous taxa from Patagonia,indicating that at least some continental vertebrates could disperse between southern South America and Antarctica during the final stages of the Mesozoic. | Matthew CLAMANNA Judd ACASE Eric MROBERTS Victoria MARBOUR Ricardo CELY Steven WSALISBURY Julia ACLARKE DEdward MALINZAK Abagael RWEST Patrick MO’CONNOR | 2019 | Advances in Polar Science2019，30，3： | 0 |
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