New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia

Q2 Agricultural and Biological Sciences

Memoirs of Museum Victoria Pub Date : 2016-01-01 DOI:10.24199/J.MMV.2016.74.15

N. Pledge

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引用次数: 4

Abstract

Pledge, N.S. 2016. New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia. Memoirs of Museum Victoria 74: 173–187. Knowledge about the extinct phalangeroid family Ektopodontidae is increased by the discovery of new material from several localities. Previously unknown teeth of Chunia illuminata and Ektopodon stirtoni are described respectively from White Sands Basin and Mammalon Hill, Lake Palankarinna, Lake Eyre Basin, South Australia, with M1 being recorded for the first time for any species of Chunia., and a full maxilla of Ektopodon stirtoni showing the positional relationship between P3 and M1 for the first time; this is even more extreme than the arrangement postulated previously. Another species Ektopodon litolophus has been described on the basis of an M1 found at the Leaf Locality, Lake Ngapakaldi, Lake Eyre Basin. Material from Lake Tarkarooloo, referred to Ektopodon stirtoni, is redescribed as a new species Ektopodon tommosi. Comparisons of M1 of Chunia and Ektopodon species now allow evolutionary trends, such as increasing number of cusps on the molar lophs, and simplification of the cusps, to be discerned.

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标题南澳大利亚虎齿兽新种(有袋目:虎齿兽科)

誓言，n.s.2016。标题南澳大利亚虎齿兽新种(有袋目:虎齿兽科)。维多利亚博物馆回忆录74:173-187。关于已经灭绝的指骨类Ektopodontidae家族的知识随着来自几个地方的新材料的发现而增加。分别在澳大利亚南部的White Sands Basin和Lake Palankarinna, Lake Eyre Basin的Mammalon Hill描述了Chunia illuminata和Ektopodon stirtoni的未知牙齿，其中M1是首次在Chunia物种中记录到。斯特托尼Ektopodon的完整上颌骨首次显示P3和M1之间的位置关系;这比先前假设的安排更为极端。另一种Ektopodon litolophus是在艾尔湖盆地Ngapakaldi湖叶区发现的M1的基础上描述的。来自Tarkarooloo湖的材料，被称为Ektopodon stirtoni，被重新描述为一个新的物种Ektopodon tommosi。现在，对中国龙和Ektopodon物种的M1进行比较，可以看出进化趋势，例如臼齿上尖头的数量增加，尖头的简化。

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来源期刊

Memoirs of Museum Victoria Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.10

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0.00%

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