Rodents (Mammalia) from Diamond O Ranch Local Fauna, Southwestern Montana

IF 0.6 4区地球科学 Q4 PALEONTOLOGY

Annals of Carnegie Museum Pub Date : 2017-11-24 DOI:10.2992/007.084.0404

W. Korth, Alan R. Tabrum

引用次数: 3

Abstract

ABSTRACT Eleven species of rodents are described from the Diamond O Ranch local fauna from the Beaverhead Basin, southwestern Montana. Of the species recognized, seven have been previously reported from the Chadronian of Montana or adjacent Wyoming and Saskatchewan or Texas: Ardynomys occidentalis Burke, 1936; Pseudocylindrodon sp., cf. Pseudocylindrodon neglectus Burke, 1935; Eutypomys parvus Lamb, 1908; Adjidaumo minimus (Matthew, 1903); Paradjidaumo disjunctus Korth, 2013; Paradjidaumo nanus Emry and Korth, 2013; and Aulolithomys vexilliames Korth and Emry, 1997. Isolated molars of two different indeterminate species of Ischyromys Leidy, 1856, are also recognized. Two new species are described: the ischyromyine Spurimus hoffmani and the eomyid Metanoiamys norejkoi. Both these species represent the latest occurrence of these genera, which are elsewhere limited to the earlier Eocene. The rodents from Diamond O Ranch suggest an early Chadronian age for the fauna; however, other components of the fauna make this age determination uncertain (Tabrum et al. 1996:295; Fostowicz-Frelik and Tabrum 2009).

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来自蒙大拿州西南部Diamond O Ranch当地动物群的啮齿动物(哺乳类)

摘要:研究了蒙大拿州西南部比弗黑德盆地Diamond O Ranch地区的11种啮齿动物。在已确认的物种中，有7种以前在蒙大拿州或邻近的怀俄明州和萨斯喀彻温省或德克萨斯州的乍得罗尼亚报道过:Ardynomys occidentalis Burke, 1936;pseudoylindrodon sp.，参见pseudoylindrodon neglect Burke, 1935;羊羔，1908;最小值(Matthew, 1903);Paradjidaumo disjunctus north, 2013;parjidaumo nanus Emry and Korth, 2013;和auulolithomys vexilliames Korth and Emry, 1997。两个不同的不确定种Ischyromys Leidy, 1856，分离的磨牙也被确认。描述了两种新种:缺色虫(Spurimus hoffmani)和原形虫(Metanoiamys norejkoi)。这两个物种都代表了这些属的最新出现，而这些属在其他地方仅限于始新世早期。钻石O牧场的啮齿动物表明该动物群生活在早第三纪;然而，动物群的其他组成部分使这种年龄测定不确定(Tabrum et al. 1996:295;Fostowicz-Frelik and Tabrum 2009)。

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来源期刊

Annals of Carnegie Museum 综合性期刊-动物学

CiteScore

2.50

自引率

18.20%

发文量

审稿时长

>12 weeks

期刊介绍： Annals of Carnegie Museum is a quarterly journal that publishes peer-reviewed short and medium-length original scientific contributions in organismal biology, earth sciences, and anthropology, in 40 by 52.5 pica format (168 by 220 mm or 6-5/8 by 8-5/8 inches). Subject matter must be relevant to Carnegie Museum of Natural History scientific sections or Powdermill Nature Reserve (PNR), preferably with connection to the Carnegie collection and/or personnel. Carnegie Museum staff and research associates receive publication priority, but others are encouraged to submit papers, especially those manuscripts explicitly based on the Carnegie collection.