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A new genus and species of medium-sized fossil primate, Myanmarpithecus yarshensis, is described from the lastest middle Eocene sediments of Pondaung, central Myanmar (Burma). The specimens consist of right maxillary fragments with P(4)-M(3)and a left mandibular corpus with C-P(3)and M(2-3). To date, three purported anthropoids have been discovered from the Pondaung FormationPondaungia and Amphipithecus (Amphipithecidae) and Bahinia (Eosimiidae). Myanmarpithecus differs from these other Pondaung primates in having cingular hypocones on upper molars and in lacking paraconids on M(2-3). Although Myanmarpithecus resembles some utahiin omomyines in superficial aspects of the morphology of M(2-3)(i.e., mesiodistally compressed molar trigonid and enamel crenulation), the morphological analysis of upper molars and lower premolars indicates that it is neither an omomyoid nor an adapoid but is more derived than fossil prosimians (such as adapoids, omomyoids, and tarsiers) and more anthropoid-like. On the other hand, it is more primitive (prosimian-like) than early anthropoids from the late Eocene/early Oligocene of the Fayum, Egypt. Myanmarpithecus is likely to be an early, primitive anthropoid ("protoanthropoid").

译文

从缅甸中部(缅甸)庞东最新的中新世中新世沉积物中,描述了一种中型化石灵长类动物的新属和种。标本由具有P(4)-M(3)的右上颌骨碎片和具有C-P(3)和M(2-3)的左下颌骨组成。迄今为止,已经从庞东岩层庞东岩和两栖猿(两栖纲)和Bahinia(嗜伊科)中发现了三个据称的类人动物。缅甸猿与其他这些Pondaung灵长类动物的不同之处在于,上臼齿上有齿状次圆锥,而M(2-3)上没有副圆锥形。尽管缅甸皮氏菌在M(2-3)形态的表观方面(即近中压缩的磨牙三角骨和牙釉质细齿化)类似于某些utahiin乙型肌氨酸,但上臼齿和下前臼齿的形态分析表明,它既不是阿米巴型也不是阿片类药物但比化石prosimians(如阿片类,阿片类和tarsiers)更衍生,更像类人猿。另一方面,它比来自埃及法尤姆的晚始新世/早渐新世的早期类人猿更原始(类似prosimian)。缅甸猿可能很可能是早期的原始类人猿(“ protoanthropoid”)。

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