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首页> 外文期刊>Journal of vertebrate paleontology >NEW MATERIAL OF MOROPUS (PERISSODACTYLA, CHALICOTHERIIDAE, SCHIZOTHERIINAE) FROM THE EARLY HEMINGFORDIAN ROSE CREEK MEMBER OF THE JOHN DAY FORMATION, OREGON, USA
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NEW MATERIAL OF MOROPUS (PERISSODACTYLA, CHALICOTHERIIDAE, SCHIZOTHERIINAE) FROM THE EARLY HEMINGFORDIAN ROSE CREEK MEMBER OF THE JOHN DAY FORMATION, OREGON, USA

机译：美国俄勒冈州约翰·戴姆（John Johnson）组早期的亨明福德玫瑰小溪成员的一种莫洛普斯的新材料（佩罗索氏菌属，钩毛线虫科，裂殖藻科）

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摘要

A juvenile maxilla of Moropus with DP3-M1, collected from the early Hemingfordian (He1) Picture Gorge 36 local fauna of the Rose Creek Member of the John Day Formation of Oregon, U.S.A., is the best-preserved chalicothere specimen yet collected from the John Day Basin. It also provides additional understanding of early Miocene Schizotheriinae (Perissodactyla, Chalicotheriidae) in western North America. Although Coombs etal. attributed all of the John Day chalicotheres to Moropus oregonensis, the new specimen resembles in size and morphology some of its early Hemingfordian contemporaries from the Runningwater Formation of the Great Plains and is referred to Moropus sp. Moropus sp. can thus be added to the oreodont Merycochoerus magnus, the amphicyonid Daphoenodon (Borocyon) robustum, the dromomerycid Barbouromeryx, the moschid Parablastomeryx schultzi, and the equid Parahippus pawniensis as John Day taxa with close relatives in the early Hemingfordian of the Great Plains. Further, the identification of the fragmentary chalicothere fossils from the John Day Formation is made more complex by the likely presence of more than one species there during the early Miocene.
机译：从美国海明福德早期（He1）图片峡谷36玫瑰溪的本地动物区系（美国俄勒冈州约翰·戴日队的成员）采集的带有DP3-M1的幼年摩罗普斯是保存最完好的鹅膏兽标本。天盆地。它还提供了对北美西部早期中新世裂殖藻科（Perissodactyla，Chalicotheriidae）的更多了解。虽然库姆斯等。这归因于约翰·约翰所有的讽刺动物均来自Moropus oregonensis，新标本的大小和形态类似于大平原自来水组的一些早期Hemingfordian同时代人，被称为Moropus sp。 Moropus sp。因此，可以将其作为约翰·戴大帝类群添加到Oreodont Merycochoerus magnus，两栖类Daphoenodon（Borocyon）稳健，dromomerycid Barbouromeryx，moschid Parablastomeryx schultzi和等价的Parahippus pawniensis中，并在早期Hemingfordian拥有近亲。此外，由于中新世早期可能存在一种以上的物种，因此从约翰·戴日（John Day）组识别片段化石化石化石变得更加复杂。

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