Subfossil lemur discoveries from the Beanka Protected Area in western Madagascar

Subfossil lemur discoveries from the Beanka Protected Area in western Madagascar
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马达加斯加西部比恩卡保护区发现狐猴亚化石

DOI:
10.1017/qua.2019.54
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发表时间:
2020
影响因子:
2.3
通讯作者:
Griffiths, Owen
Griffiths, Owen
中科院分区:
地球科学3区
文献类型:
--
作者:
Burney, David A.;Andriamialison, Haingoson;Andrianaivoarivelo, Radosoa A.;Bourne, Steven;Crowley, Brooke E.;de Boer, Erik J.;Godfrey, Laurie R.;Goodman, Steven M.;Griffiths, Christine;Griffiths, Owen

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在马达加斯加西部一个以前未被勘探过的地区(Beanka保护区)的一个新的化石地点发现了许多最近灭绝的脊椎动物的遗骸,包括巨型狐猴(Babakotia radofilai,Palaeopropithecus kelyus,Pachylemur sp.,和Archaeolemur edwardsi),食肉动物(Cryptoprocta spelea),类土豚的近狐蝠属,和巨型地鹃(Coua)。其中许多代表了相当大的范围扩展。从该地区灭绝的现存物种(例如,原狐猴(Prolemur simus)也存在。已灭绝灵长类动物的10块骨头的放射性碳年龄跨越了过去的三千年。大部分未受干扰的骨骼沉积物的埋藏支持了这样的解释,即许多标本是从入口上方的岩石边缘掉下来的。一些灵长类动物和其他哺乳动物可能是鸟类掠食者的猎物,但人类的捕食也很明显。锶同位素比值(87 Sr/86 Sr)表明化石是当地的。陶器碎片和已灭绝和现存脊椎动物的骨头,带有切割和切割痕迹,表明前几个世纪的人类活动。木炭和人工制品的稀缺表明人类只是偶尔访问该网站。这个地点的化石组合是不寻常的,因为它包含了许多树懒狐猴,但它缺乏平胸类,鱼和鳄鱼,这些是马达加斯加几乎所有其他全新世亚化石地点的典型特征。
A new fossil site in a previously unexplored part of western Madagascar (the Beanka Protected Area) has yielded remains of many recently extinct vertebrates, including giant lemurs (Babakotia radofilai, Palaeopropithecus kelyus, Pachylemur sp., and Archaeolemur edwardsi), carnivores (Cryptoprocta spelea), the aardvark-like Plesiorycteropus sp., and giant ground cuckoos (Coua). Many of these represent considerable range extensions. Extant species that were extirpated from the region (e.g., Prolemur simus) are also present. Calibrated radiocarbon ages for 10 bones from extinct primates span the last three millennia. The largely undisturbed taphonomy of bone deposits supports the interpretation that many specimens fell in from a rock ledge above the entrance. Some primates and other mammals may have been prey items of avian predators, but human predation is also evident. Strontium isotope ratios (87Sr/86Sr) suggest that fossils were local to the area. Pottery sherds and bones of extinct and extant vertebrates with cut and chop marks indicate human activity in previous centuries. Scarcity of charcoal and human artifacts suggests only occasional visitation to the site by humans. The fossil assemblage from this site is unusual in that, while it contains many sloth lemurs, it lacks ratites, hippopotami, and crocodiles typical of nearly all other Holocene subfossil sites on Madagascar.
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发表时间: 2008
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