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禄丰大猿化石分类的修订 总被引：8，自引：3，他引：8
本文将禄丰西瓦古猿与巴基斯坦和土耳其的标本进行了对比,认为前者与后者有明显的不同。提出把禄丰的标本修订为禄丰古猿属同名种(Lufengpithecus lufengensis)。 相似文献
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对出自禄丰石灰坝的26个禄丰古猿下颌齿列的246枚恒齿进行了观察研究,发现禄丰古猿具有普遍的带状釉质发育不全（LEH）现象,个体LEH比例为100%,恒齿LEH比例为85%。乳齿几乎没有LEH现象,第一恒臼齿的LEH比例也很低仅57%。根据牙齿萌出顺序及现代大猿的牙齿发育年龄特征,作者推断2—3岁之前的幼儿古猿很少出现釉质发育不全现象,这可能与母体的营养关照有关。禄丰古猿的LEH的发生频率具有明显的季节性,结合中新世晚期气候变化特征、古猿的生态环境、生活习性及食性特征分析,作者推测：季节性营养不良可能是造成禄丰古猿釉质发育不全的主要原因。 相似文献
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本文记述了１９８０年在云南省禄丰县石灰坝村禄丰古猿地点发现的最晚中新世禄丰古猿的幼年下颌骨ＰＡ８６９。作者将此标本与西瓦古猿的,南方古猿的和现生大猿的幼年下颌进行了对比,记述了禄丰古猿幼下年颌的若干特征,这些特征表明禄丰古猿幼年下颌体各部主要尺寸的比例关系本种成年的十分相似。 相似文献
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牙釉质发育不全是反映牙齿发育过程中遭遇生理性刺激的有效指标。本文对来自云南禄丰石灰坝的禄丰古猿(Lufengpithecus lufengensis)261枚单颗恒齿进行观察分析,发现223枚牙齿普遍罹患带状牙釉质发育不全(LEH),比例为85.4%,高于其它已报道过的中新世古猿、化石人科成员及现生大猿。另一方面,用扫描电镜和数码显微镜着重分析了12枚犬齿,均有多条LEH,且雄性犬齿的LEH条数多于雌性;相邻LEH间的釉面横纹数在14-25条之间。结合禄丰古猿釉面横纹的生长周期(9天),估算相邻LEH之间的时间间隔为4.8-6.6月,季节性营养不良可能是禄丰古猿釉质发育不全的主要原因。 相似文献
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The cervical part of vertebral column of the head portrait of the Lufeng ape is short, and it crosses the Frankfurt Horizontal at 50°. Its lateral contours, especially of the soft tissue of the concave . “nose -premaxilla” and the partial spherical premaxilla, are similar to those of the orang-utan.<br>The pronounced features of the physiognomy of the head of the Lufeng ape are broad interorbital region and mid-face. Besides, its nasal root and bridge are very low and flat.<br>The form of soft nose of the Lufeng ape is similar to that of the orang-utan on the basis of their similar piriform apertures. It belongs to the nose of ape-type. But the breadth of the alae nasi is narrower than that of the orang-utan. The antero-inferior parts of the base of alae nosi extend mesially like that of the gorilla. However, its alae nasi shows some hominid features, for example, the nostrils face slightly inferiorly, it projects somewhat laterally and its groove is little developed.<br>The form of snout and muscles of lip of the Lufeng ape are similar to those of the orang-utan. Each end of the mouth is situated in the place between the canine and the first premolar. The red lips are very thin, especially the upper one. The form, the trend, and the strength of the muscles of upper and lower lips resemble those of the orang-utan. It is possible that the Lufeng ape possesses und undivided levator muscle of upper lip and lacks expressional functions in drawing the alae nasi and its groove.<br>The soft tissues on the buccal aspect of the Lufeng ape are very thick and strong, and its masseter and buccinator are well developed. 相似文献
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Since 1975 over 1, 000 teeth (isolated and attached to the jaws) of Ramapithecus and Sivapithecus have been collected at the Shihuiba site in Lufeng County, Yunnan Province. The morphological deseription and comparison of the materials show that many characters of Ramapithecus are consistent with those of Sivapithecus, but their canines and lower premolars exhibit bigger differences possibly of different sex. On the basis of the comparison with the living apes, they are similar to those of orang-utan in many features, but very different from gorilla and chimpanzee. One possibility is that Lufeng Ramapithecus and Sivapithecus are of the different sex of the same form, and related closely to the orang-utan.<br>However, on the other hand, the teeth of Lufeng Ramapithecus have some characters approach to those of Australopithecus afarensis and A. africanus, while the big canines of Sivapithecus are very different from those of australopithecines. Thus another possibility is that Lufeng Ramapithecus and Sivapithecus are two different forms: the former may be a member of the early hominid evolving to australopithecines, and the latter seems to be more similar to orang-utan. 相似文献
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禄丰腊玛古猿和西瓦古猿的牙齿有许多性状是一致的,但在犬齿和下前臼齿的形态上则有较大的差别,这些差别可能是两性的差别。它们与现代大猿类相比,表现出与猩猩比较相似,而与大猩猩和黑猩猩差别较大,因而禄丰腊玛古猿和西瓦古猿可能是同一类型的雌雄个体,与猩猩有较近的关系。但另一方面,与南方古猿类的牙齿相比,禄丰腊玛古猿牙齿又显示出较多的相似于南方古猿阿法种和非洲种的性状,而西瓦古猿大的犬齿与所有南方古猿类差别甚大,因此另一种可能性是禄丰腊玛古猿与西瓦古猿是不同的类型,前者是向南方古猿方向进化的早期的人科成员。 相似文献
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Chen Wanyong 《人类学学报》1986,5(01):79
This paper deals with the reeostruetion of the late Miocene paleoelimate by meaus of sedimentary analyses of the stratum containing Ramapithecus fossils. The analyses include: differential thermal analysis, X-ray diffraction, heavy mineral content, pH value, organic substances, sporo-pollens and identification of aquatie plant maero-fossils.<br>The paleoclimate of the late Miocene gradually changed along with the uplifting of the highlands of Qinghai-Xizang (Tibet) and the Hengduan mountains. The geological section containing Ramapithecus fossils can be divided into five different depositional stages, from bottom to top:<br>The first stage— (the First Member of Shihuiba Formayion) The climate in this stage is drier and cooler than in the second one.<br>The second stage- (the Second Member of Shihuiba Formation) The climate is charaterized by a warm and wet perind.<br>The third stage—includes the early deposits of deep lacustrine and lacustrine-swamp environments in the basin. It indicates a hot, wet elimatic character, typical of the South Asian tropical zone.<br>The fourth stage—repersents the later lacustrine-swamp deposits of the middle and upper parts of the basin. The climate during this stage is different from that of the first—It indicates a climate that alternates between wet and dry and hot and wet. It demonstrates the periodie return of wet and dry eonditions, and is similar to that of the Sino-India tropical monsoon climate of South Asia. This climatic change is pro- bobly related to the uplifting of the Qinghai-Xizang (Tibet) plateau and the orogeny which produced the Himalayas and the Hengduan mountains.<br>The fifth stage includes the deposits of shallow lakes or rivers above the erosional surface in the geological section bearing Ranapithecus fossils. Here, substantial climatic change is indieated. Following the uplifting of the Qinghai-Xizang (Tibet) plateau, the Lufeng lacustrine-swamp environment faded away, and a very dry elimate is suggested. Finally one withesses the return of a rather warm and wet sub-tropical climate. 相似文献