XENOPUS FROM PALEOCENE OF BRAZIL AND ITS ZOOGEOGRAPHIC IMPORTANCE
XENOPUS FROM PALEOCENE OF BRAZIL AND ITS ZOOGEOGRAPHIC IMPORTANCE
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DOI：
10.1038/254048a0
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发表时间：
1975-01-01
期刊：
影响因子：
64.8
通讯作者：
ESTES, R
中科院分区：
文献类型：
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作者：
ESTES, R
非洲蛙非洲爪蟾（属蛙科），以前发现于中新世1，2和最近的沉积物在非洲，这里描述的是巴西古新世（约6000万年）。现存的小蛙是水生淡水蛙，分布于撒哈拉以南非洲（爪蟾属、膜手蛙属、拟膜手蛙属）和南美洲北方（琵琶属、原琵琶属、半琵琶属）。它们显示出原始和专业化特征的马赛克，通常被视为早期无尾类种群的古老分支。皮皮科的化石和最近出现的情况都与仅在南部大陆的古代分布一致3，5。
THE African frogXenopus(a member of the family Pipidae), formerly found in Miocene1,2and Recent deposits in Africa, is described here from the Palaeocene (∼ 60 Myr) of Brazil. Extant pipids are aquatic freshwater frogs, occurring in sub-saharan Africa (Xenopus,Hymenochirus,Pseudhymenochirus) and northern South America (Pipa,Protopipa,Hemipa). They display a mosaic of primitive and specialised characteristics and are generally placed as an ancient offshoot of early anuran stock. Both fossil and recent occurrences of the Pipidae are consistent with an ancient distribution exclusively across the southern continent3,5.