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首页> 外文期刊>Chinese science bulletin >A new species of Gobiconodon (Triconodonta, Mammalia) and its implication for the age of Jehol Biota
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A new species of Gobiconodon (Triconodonta, Mammalia) and its implication for the age of Jehol Biota

机译:Gobiconodon(Triconodonta,哺乳动物)的一种新物种及其对热河生物群时代的启示

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A new species of Gobiconodon is found from the Yixian Formation of western Liaoning, China. The new taxa, G zofiae sp. nov., has a confluent opening for branches Ⅱ and Ⅲ of the trigeminal nerve on the anterior lamina of the petrosal. G zofiae sp. nov. is similar to Repenomamus in having an ossified Meckel's cartilage connecting the lower jaws and ear region. The new species, with enlarged I~1/I_1, posteriorly located infraorbital foramen and four mental foramina, distinctly differs from the other species of Gobiconodon. The new material indicates that Gobiconodon has four, not five, upper molariforms. The presence of Gobiconodon in Jehol Biota makes it possible to correlate Jehol Biota with faunas in eastern Asia and North America, and suggests the age of the Yixian Formation to be Early Cretaceous.
机译:从辽西西部的义县组发现了一种新的杯形象。新的分类单元,G zofiae sp。 nov。,在前壁椎板的三叉神经的分支Ⅱ和Ⅲ具有汇合的开口。 zofiae sp。十一月与Repenomamus的相似之处在于,它的下颌骨与耳朵区域之间有一个骨化的Meckel软骨。 I〜1 / I_1增大的新物种位于眶下孔和四个精神孔中,与其他Gobiconodon物种明显不同。新材料表明,杯形齿兽有四个而不是五个上磨牙。在热河生物群中存在戈壁象龙,使得将热河生物群与东亚和北美洲的动物区系相关联成为可能,并表明义县组的年龄是早白垩世。

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