A new species of Eogruidae (Ayes: Gruiformes) from the Miocene of the Linxia Basin, Gansu, China: Evolutionary and climatic implications
A new species of Eogruidae (Ayes: Gruiformes) from the Miocene of the Linxia Basin, Gansu, China: Evolutionary and climatic implications
复制标题
中国甘肃临夏盆地中新世的Eogruidae（Ayes：Gruiformes）一新种：进化和气候影响
DOI：
10.1093/auk/ukz067
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Clarke Julia A.
中科院分区：
文献类型：
--
作者：
Musser Grace;Li Zhiheng;Clarke Julia A.
Despite having one of the most robust fossil records within core-gruiform birds (rails, cranes, and allies), the biogeographic history of Gruidae (cranes) and key drivers of diversification within this group remain largely unknown. The Eogruidae of Eurasia represent some of the earliest known crane-like fossils. Here, we present description of a new species represented by a well-preserved specimen of a foot from the late Miocene (7–6.5 mya) Liushu Formation of Linxia Basin, Gansu, China. It is the only eogruid fossil that has been found in this formation and is the first eogruid known from northwest China. Linxia Basin is located along the margin of the northeastern Tibetan Plateau, which allows for new insight into Miocene dispersal of the Eogruidae and potential climatological and geological connections. It is also the first specimen with an associated tarsometatarsus and nearly complete phalanges, including a claw, which provides further morphological information on this taxon. Referral of the new specimen to Eogruidae is based on extreme reduction of the trochlea of metatarsal II, which is most similar to the condition present in the eogruid subclade traditionally termed Ergilornithidae.
