A New Species of Gomphos (Glires, Mammalia) from the Eocene of the Erlian Basin, Nei Mongol, China
A New Species of Gomphos (Glires, Mammalia) from the Eocene of the Erlian Basin, Nei Mongol, China
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中国内蒙古二连盆地始新世的Gomphos新种（哺乳动物）
DOI：
10.1206/673.1
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发表时间：
2009-11-30
影响因子：
1.5
通讯作者：
Beard, K. Christopher
中科院分区：
文献类型：
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作者：
Meng, Jin;Kraatz, Brian P.;Beard, K. Christopher
新记录的齿突锥虫Gomphos shevyrestrium，sp. nov.描述了内蒙古二连盆地呼和勃尔河地区伊尔丁曼哈组下部的一套古生物化石。该新种与G. elkema和G.有更坚固的牙齿，有膨胀的尖齿和更坚固的齿突，跟骨上有额外的连接黄芪和舟骨的关节。新物种在地层上受到很好的限制，可能是该属已知最年轻的物种，其地质记录延伸到始新世中期。它还表明，mimotonids共存了数百万年的一个侧分支的duplicacratates与最早的干兔形目，包括Dawsonolagus。
Dental and postcranial specimens of Gomphos shevyrevae, sp. nov., from the lower part of the Irdin Manha Formation at the Huheboerhe locality, Erlian Basin, Nei Mongol (Inner Mongolia), are described. The new species differs from G. elkema and G. ellae in having more robust teeth with inflated cusps and stronger lophs and a calcaneus with extra articulation for the astragalus and navicular. The new species is stratigraphically well constrained and probably represents the youngest known species of the genus, extending its geological record into the Middle Eocene. It also shows that mimotonids coexisted for millions of years as a side branch of duplicidentates with the earliest stem lagomorphs, including Dawsonolagus.