Ancient collagen reveals evolutionary history of the endemic South American 'ungulates'.
Ancient collagen reveals evolutionary history of the endemic South American 'ungulates'.
复制标题
古老的胶原蛋白揭示了南美地方性“无凝结”的进化史。
DOI：
10.1098/rspb.2014.2671
复制
发表时间：
2015-05-07
期刊：
影响因子：
--
通讯作者：
Buckley M
中科院分区：
文献类型：
--
作者：
Buckley M
自18世纪末以来，美洲一直在描述奇怪的灭绝生物的化石，揭示了哺乳动物历史上前所未有的一章。其中最奇怪的是南美本土的有蹄类动物，它们被认为代表了一群在南美洲相对孤立地进化的哺乳动物，但它们与任何特定的胎盘血统的亲和力都不确定。许多作者认为它们是劳拉西亚人‘Condylarth’的后裔，其中还包括周脚趾和偶趾龙的可能祖先，而另一些人则认为它们要么更接近南美独有的异种动物(食蚁兽、螳螂和树懒)，要么是基本的非泡沫动物(例如大象和鬣狗)。由于相互矛盾的形态特征和到目前为止无法检索分子信息，这些假说一直存在争议。在“原生”南美哺乳动物中，只有毒牙和角鸟一直存活到更新世晚期--全新世早期。由于从温暖气候的标本中提取古DNA(ADNA)是已知的困难，本研究提出了基于蛋白质组学(液相-串联质谱仪)骨胶原测序分析的Macrauchenia patachonica(Litopterna)和Toxodon Platensis(Notounulata)的分子系统发育。这一结果将这两个分类群放在一个与周趾亚纲单系进化的支系中，后者今天以马、犀牛和绒毛类为代表。
Since the late eighteenth century, fossils of bizarre extinct creatures have been described from the Americas, revealing a previously unimagined chapter in the history of mammals. The most bizarre of these are the ‘native’ South American ungulates thought to represent a group of mammals that evolved in relative isolation on South America, but with an uncertain affinity to any particular placental lineage. Many authors have considered them descended from Laurasian ‘condylarths’, which also includes the probable ancestors of perissodactyls and artiodactyls, whereas others have placed them either closer to the uniquely South American xenarthrans (anteaters, armadillos and sloths) or the basal afrotherians (e.g. elephants and hyraxes). These hypotheses have been debated owing to conflicting morphological characteristics and the hitherto inability to retrieve molecular information. Of the ‘native’ South American mammals, only the toxodonts and litopterns persisted until the Late Pleistocene–Early Holocene. Owing to known difficulties in retrieving ancient DNA (aDNA) from specimens from warm climates, this research presents a molecular phylogeny for both Macrauchenia patachonica (Litopterna) and Toxodon platensis (Notoungulata) recovered using proteomics-based (liquid chromatography–tandem mass spectrometry) sequencing analyses of bone collagen. The results place both taxa in a clade that is monophyletic with the perissodactyls, which today are represented by horses, rhinoceroses and tapirs.
登录
查看更多内容
影响因子：
2.8
作者：
Buckley, Mike;Kansa, Sarah Whitcher;Collins, Matthew
通讯作者：
Collins, Matthew
影响因子：
2
作者：
Buckley, Michael;Collins, Matthew;Wilson, Julie C.
通讯作者：
Wilson, Julie C.
DOI：
10.1016/j.palaeo.2014.06.026
发表时间：
2014-12-15
影响因子：
3
作者：
Buckley, M.;Wadsworth, C.
通讯作者：
Wadsworth, C.
影响因子：
--
作者：
Billet, Guillaume;Martin, Thomas
通讯作者：
Martin, Thomas
影响因子：
2.2
作者：
Buckley, Mike;Kansa, Sarah Whitcher
通讯作者：
Kansa, Sarah Whitcher