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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >New material of Cayaoa bruneti TONNI, an Early Miocene anseriform (Aves) from Patagonia, Argentina
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New material of Cayaoa bruneti TONNI, an Early Miocene anseriform (Aves) from Patagonia, Argentina

机译:来自阿根廷巴塔哥尼亚的早中新世无形畸形(Aves)的Cayaoa bruneti TONNI的新材料

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摘要

Cayaoa bruneti TONNI, 1979 is an early Neogene anseriform exhumed from marine sediments of the lower levels of the Gaiman Formation "Patagoniano", Leonian Marine Stage, Chubut, Argentina). It was originally based on a partial tarsometatarsus that was not assigned to subfamily or tribe. We re-examine the holotype and study new tarsometatarsi, and previously undescribed skeletal elements including partial femora, tibiotarsi, partial humeri and carpometacarpi. Cayaoa bruneti was a strictly foot-propelled diving bird that exhibited an extreme reduction of the fore-limb, being probably the earliest recorded flightless duck. Similarly reduced wings are found the distantly related anseriform Cnemiornis OWEN, 1866 of subrecent deposits of New Zealand, Chendytes MILLER, 1925 of the Pleistocene of California, and the moa-nalos of the Late Quaternary of Hawaii.
机译:Cayaoa bruneti TONNI,1979年,是从阿根廷Chubut的Leonian Marine Stage Gaiman组“ Patagoniano”低层海相沉积物中挖掘出的一种新近纪无脊椎动物。它最初是基于未分配给亚科或部落的部分鱼。我们重新检查整体型,研究新的tarsometatarsi,以及以前未描述的骨骼元素,包括部分股骨,胫骨,部分肱骨和carpcarpatacarpi。 Cayaoa bruneti是一只严格用脚推动的潜水鸟,其前肢极端减少,可能是有记录的最早不会飞的鸭子。类似地,发现了减少的机翼,这是与远缘相关的无瓣形Cnemiornis OWEN,1866年是新西兰的近来沉积物,Chendytes MILLER,是1925年的加利福尼亚更新世,以及夏威夷后期第四纪的moa-nalos。

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