Australia's oldest Anseriform fossil: a quadrate from the Early Eocene Tingamarra Fauna

被引：8

作者：

Elzanowski, Andrzej ^{[1
]}

Boles, Walter E. ^{[2
]}

机构：

[1] Polish Acad Sci, Museum & Inst Zool, PL-00679 Warsaw, Poland

[2] Australian Museum, Res & Collect Branch, Sydney, NSW 2010, Australia

来源：

PALAEONTOLOGY | 2012年 / 55卷

关键词：

Anseriformes; Anhimidae; quadrate; Eocene; Australia; Tingamarra; CRETACEOUS LANCE FORMATION; PRESBYORNIS; MORPHOLOGY; EVOLUTION; AVES;

D O I：

10.1111/j.1475-4983.2012.01166.x

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

A partial quadrate (essentially the otic part) from the nonmarine, earliest Eocene (54.6 Ma) Tingamarra Local Fauna in Queensland, Australia, has been identified as the oldest Australian anseriform fossil. The Tingamarra quadrate shows a combination of plesiomorphic anseriform characters with a unique synapomorphic character complex of the Anhimidae (screamers), which today are endemic to South America. In concert with the basal position of the Anhimidae among the crown-group anseriforms, this set of characters suggests a stem group of the Anhimidae, raising a possibility of the Transantarctic migration of stem anhimids to South America. The quadrate morphology supports palaeognathous rather than recently claimed anhimid relationships of the Dromornithidae and identifies Sylviornis as an anseriform rather than a galliform.

引用

页码：903 / 911

页数：9

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