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1.
    
The nearly complete cranium DAN5/P1 was found at Gona (Afar, Ethiopia), dated to 1.5–1.6 Ma, and assigned to the species Homo erectus. Its size is, nonetheless, particularly small for the known range of variation of this taxon, and the cranial capacity has been estimated as 598 cc. In this study, we analyzed a reconstruction of its endocranial cast, to investigate its paleoneurological features. The main anatomical traits of the endocast were described, and its morphology was compared with other fossil and modern human samples. The endocast shows most of the traits associated with less encephalized human taxa, like narrow frontal lobes and a simple meningeal vascular network with posterior parietal branches. The parietal region is relatively tall and rounded, although not especially large. Based on our set of measures, the general endocranial proportions are within the range of fossils included in the species Homo habilis or in the genus Australopithecus. Similarities with the genus Homo include a more posterior position of the frontal lobe relative to the cranial bones, and the general endocranial length and width when size is taken into account. This new specimen extends the known brain size variability of Homo ergaster/erectus, while suggesting that differences in gross brain proportions among early human species, or even between early humans and australopiths, were absent or subtle.  相似文献   

2.
针对学术界有关非洲与亚洲直立人关系的争论,本文对一些用来支持非洲早期直立人从直立人中分离出来而归入匠人的主要形态学证据进行了检验,用于研究的标本包括迄今在东非发现的年代最早的直立人KNM-ER 3733、KNM-ER 3883和KNM-WT15000头骨化石,这些石是被提倡非洲与亚洲的直立人分离两个种的学者归入匠人的主要标本,对这些非注早期直立人与中国直立人18项头骨特征对比显示:一些被认为是局限于亚洲直立人的独有特征在上述非洲直立人头骨都有出现,存在于非洲直立人与中国直立人之间的颅骨特征上的差别主要体现在特征的表现程度与方式的不同,作者认为根据本文对比的颅骨特征,非洲直立人与中国直立人在颅骨形态上非常相似,他们之间的形态差异反映了直立人具有较宽的形态变范围,认为亚洲直立人具有特化的衍生性状的观点在本文不能得到支持。  相似文献   

3.
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The establishment of the new species ‘Homo antecessor’ was mainly based on the remains of an immature individual ATD6-69,found at the TD6 litostratigraphic unit (LU) of the Gran Dolina site in the Sierra de Atapuerca—Burgos,northern Spain[1],along with cranial,mandibular and dental traits from other fossil hominid specimens recovered in the same level. TD6 LU was initially dated about 0.78 Ma[2] using ESR-U-series; but recent redatings,employing TL and IRSL methods,suggest that its age is between 0,9-0,95 Ma. It seems that there is general consensus that TD6 LU corresponds to Marine Isotope Stage (MIS) 25. TD6-69 specimen,a partial face with R P3,M1,and germs of M2 and M3; and L I2-M1,was found in the so-called “Aurora stratum”,~1.5 m below the Brunhes–Matuyama (B–M) geomagnetic boundary. This “stratum” was in fact,an excavation area of only 6 m2 for archaeological test pit purposes. There is no real basis,from an earnest stratigraphic point of view,to consider such sedimentary level as a new litostratigraphic unit and,therefore,“Aurora stratum” should be take into account as an informal archaeo-sedimentary small area whose name was established to gain public attention from the media.  相似文献   

4.
人属先驱种(Homo antecessor),是根据西班牙阿塔普尔卡Gran Dolina洞穴堆积中发现的人类化石厘定的。出产人类化石的地层年代测定距今约90万年到78万年之间。之所以定为先驱种,是因为最初研究者认为这个西班牙的古人类群是较晚的海德堡人(H. heidelbergensis)和尼安德特人的共同祖先(H. neanderthalensis),而在非洲和欧洲发现的海德堡人则已被认为是现代人的直接祖先。目前对先驱种的争论还没有明确的结论。之所以会形成这种局面,与\"先驱种\"模式化石的生物学年龄和保存状况有极大的关系。本文对当初厘定\"先驱种\"的头骨和面骨的11个特定性状做了一个系统的回顾,尤其是和各类南方古猿(Australopithecus和Praeanthropus),最早的人属成员能人种(H. habilis)和鲁道夫种(H. rudolfensis),人属匠人种(H. ergaster),以及人属直立人种(H. erectus)面部梨状孔周边和上颌骨功能区的特征的比较研究。这11个头面骨的特征包括:1)眶下骨骼的冠状面朝向、2)犬齿窝的存在、3)上颌骨下缘外侧端向下的转折切迹、4)弧状颧骨下缘、5)梨状孔外侧上颌骨的转折和朝向、6)梨状孔外缘和颧骨起点的相对位置、7)梨状孔下缘鼻棘和侧棘的位置和组合形态、8)颧骨和上颌骨结节、9)类现代人的骨表面重塑模式、10)突出的鼻骨、和11)颞骨的上凸的颞鳞上缘。结果表明\"先驱种\"的头面骨的定性特征没有特异性,其组合与周口店的直立人面部基本形态也非常相似,因而作者倾向于认为\"先驱种\"就是直立人种的欧洲变异群体。所谓\"人属先驱种\"可能只是广义的人属直立人种(H. erectus sensu lato)欧洲代表。目前的化石材料显示欧洲和亚洲的直立人种是非洲匠人种的演变而来。  相似文献   

5.
山东沂源猿人化石   总被引:8,自引:4,他引:8  
本文记述了山东省沂源县骑子鞍山出土的一件人类头盖骨残片和七枚牙齿化石。它们的形态特征与北京猿人相似,在分类系统上应属直立人,与人类化石伴生的哺乳动物群的性质与周口店动物群相同,地质时代为中更新世。  相似文献   

6.
7.
The additional hominid material from Broken Hill, Kabwe, Zambia, is only dubiously associated with the hominid cranium from the site and is often considered to be anatomically modern in morphology. This study identifies an archaic feature, previously recognised in Pliocene and earlier Pleistocene innominates, in the Broken Hill innominate E. 719. An acetabulo-cristal buttress of cortical bone 10 mm thick is present, and this can be clearly distinguished from the morphology present in a comparative sample of large recent Homo sapiens innominates. This observation increases the likelihood that some of the additional specimens from Broken Hill are indeed of comparable antiquity to the hominid cranium and extends the range of hominids in which the feature has been recognised.  相似文献   

8.
The state of information bearing on Homo erectus as developed since about 1960 is surveyed, with the resulting effects on problems. Definitions of H. erectus still rest on the Far Eastern samples (Chou-k'ou-tien/Java), and thus relate to late Lower to middle Middle Pleistocene material. Numerous important individual finds, however, have expanded the total: extension of the early and very early Sangiran material; very early to later in Africa, and relatively late in Europe. Datings remain uncertain or controversial within broad limits, but with some important successes and revisions. Discussion by authors of problems concerns degree of divergence among H. erectus populations and rate of evolutionary change; both appear relatively slight, but the data are inadequate for much present judgment. The apparent zone of transition to more advanced morphology (H. sapiens, sensu lato) by the late Middle Pleistocene better reflects signs of regional divergence. Some writers—not all—believe that even the earliest European fossils known (e.g., Petralona) had already advanced to a H. sapiens basic level, with later change in the direction of Neanderthals. A separate African phylum, from OH 9, is also suggested; recent Chinese finds may provide a third different post-erectus population before the Upper Pleistocene. Taxonomic expression of all this gives some problems.  相似文献   

9.
1989和1990年在湖北省郧县青曲镇曲远河口学堂梁子上相继发现两具远古人类的颅骨化石。伴生的哺乳动物化石已鉴定的有18种,其中大熊猫武陵亚种、桑氏鬣狗、爪哇豺、中国猴莫、云南马、小猪等具有鲜明的时代特色,表明该地点的时代属中更新世早期或稍早。两具颅骨的形态特征比较复杂,既有明显的直立人特征,又具有某些早期人的性状。综合观察分析,直立人的特征占主要,归入直立人范畴更合适,与中国已发现的人类化石比较  相似文献   

10.
    
It has been twenty years since diagnosis and publication of the species Homo antecessor.1 Since then, new human fossils recovered from the TD6 level of the Gran Dolina site (Sierra de Atapuerca, northern Spain) have helped to refine its taxonomic and phylogenetic position. In this paper, we present a synthesis of the most characteristic features of this species, as well as our interpretation derived from the latest investigations. We focus on the phylogenetic interpretation of Homo antecessor, taking into account the most recent paleogenetic analyses and a reassessment of the European Middle Pleistocene hominin record. We try to show that, twenty years after its publication, H. antecessor provides a good opportunity to address the morphology of the last common ancestor of Neandertals and modern humans.  相似文献   

11.
    
There is currently great interest in developing ecological models for investigating human evolution. Yet little attention has been given to energetics, one of the cornerstones of modern ecosystem ecology. This paper examines the ecological correlates of variation in metabolic requirements among extant primate species, and uses this information to draw inferences about the changes in energy demands over the course of human evolution. Data on body size, resting metabolism, and activity budgets for selected anthropoid species and human hunter-gatherers are used to estimate total energy expenditure (TEE). Analyses indicate that relative energy expenditure levels and day ranges are positively correlated with diet quality; that is, more active species tend to consume more energy-rich diets. Human foragers fall at the positive extremes for modern primates in having high expenditure levels, large ranges, and very high quality diets. During hominid evolution, it appears that TEE increased substantially with the emergence of Homo erectus. This increase is partly attributable to larger body size as well as likely increases in day range and activity level. Assuming similar activity budgets for all early hominid species, estimated TEE for H. erectus is 40–45% greater than for the australopithecines. If, however, it is assumed that the evolution of early Homo was also associated with a shift to a more “human-like” foraging strategy, estimated expenditure levels for H. erectus are 80–85% greater than in the australopithecines. Changing patterns of resource distribution associated with the expansion of African savannas between 2.5 and 1.5 mya may been the impetus for a shift in foraging behavior among early members of the genus Homo. Such ecological changes likely would have made animal foods a more attractive resource. Moreover, greater use of animal foods and the resulting higher quality diet would have been important for supporting the larger day ranges and greater energy requirements that appear to have been associated with the evolution of a human-like hunting and gathering strategy. Am J Phys Anthropol 102:265–281, 1997 © 1997 Wiley-Liss, Inc.  相似文献   

12.
南召发现的人类和哺乳类化石   总被引:6,自引:1,他引:6  
本文记述的人类化石是一枚右下第二前臼齿,发现于河南省南召县鸡河右岸第二级阶地的堆积中。一起发现的哺乳类化石有剑齿虎、中国鬣狗、肿骨鹿、剑齿象、三门马和巨等二十一种。时代为中更新世。  相似文献   

13.
Examining the origins of various scientific fields may help to identify particular individuals whose thought, work, and discoveries have had a disproportionately large influence. Such individuals seem to serve as catalysts for a wider set of intellectual reactions, which then give rise to an entire field of study. In this paper, we propose explicit criteria for recognizing the founders of new fields. We contend that Eugène Dubois, best known as the man who found the “missing link” between apes and humans, should be recognized as one of the founding fathers of paleoanthropology.  相似文献   

14.
    
Liu Wu 《人类学学报》1999,18(03):176
The purpose of this paper is to study the evolution of Homo erectus by means of the analyses of dental metrics of the people of China in different time periods. The general trend of tooth reduction was found from Homo erectus to modern Chinese. From the time periods of Homo erectus till early Homo sapiens of China, there was no obvious change of tooth size. From the stage of late Homo sapiens in late Pleistocene, the tooth size of human in China decreased sharply. After that, the speed of tooth size reduction went down and came to the tooth size ranges of modern Chinese gradually. Compared with the tooth sizes of late Pleistocene and Holocene Europeans, the patterns of tooth size reduction in Chinese humans are quite different. The main differences include earlier appearance of sharp tooth size reduction, high variations of the speed of tooth size reduction and smaller scope of overall dental reduction.<br>The author believes that according to the currently hold evidence, the tooth sizes and their change patterns of Chinese humans, especially the similarities between Homo erectus and early Homo sapiens in tooth sizes, are the example of the mosaic of human evolution. The Homo erectus of China differs from early Homo sapiens of China obviously in fossil morphology and living periods. The evidence for the proposal of canceling Homo erectus and putting Homo erectus into Homo sapiens is not enough. At present, it is better to treat Homo erectus and Homo sapiens as two species within the genus of Homo. The evolutionary relationship between the two species is the course of phyletic gradualism. One of the important characteristics in the course is the existence of transition forms and......  相似文献   

15.
中国古人类牙齿尺寸演化特点及东亚直立人的系统地位   总被引:4,自引:4,他引:4  
刘武  杨茂有 《人类学学报》1999,18(3):176-192
对中国境内不同时代人类牙齿测量数据的发析显示,中国古人类牙齿尺寸的总体演化趋势与世界其它地区人类一致,呈缩小变化,其中一个表现特点是中国直立人与早期智人在牙齿尺寸上不差别不大,但作者根据对中国古人类化石形态特征,生存年代等方面的综合分析认为中国直立人在化石形态,生存年代等方面均与智人有明显的不同,取消直立人,将其并入智人意见的证据还是不够充分的,目前仍宜将直立人与智人作为人属内两个不同的种来看待,  相似文献   

16.
    
The relationship between Homo habilis and early African Homo erectus has been contentious because H. habilis was hypothesized to be an evolutionary stage between Australopithecus and H. erectus, more than a half‐century ago. Recent work re‐dating key African early Homo localities and the discovery of new fossils in East Africa and Georgia provide the opportunity for a productive re‐evaluation of this topic. Here, we test the hypothesis that the cranial sample from East Africa and Georgia represents a single evolutionary lineage of Homo spanning the approximately 1.9–1.5 Mya time period, consisting of specimens attributed to H. habilis and H. erectus. To address issues of small sample sizes in each time period, and uneven representation of cranial data, we developed a novel nonparametric randomization technique based on the variance in an index of pairwise difference from a broad set of fossil comparisons. We fail to reject the hypothesis of a single lineage this period by identifying a strong, time‐dependent pattern of variation throughout the sequence. These results suggest the need for a reappraisal of fossil evidence from other regions within this time period and highlight the critical nature of the Plio‐Pleistocene boundary for understanding the early evolution of the genus Homo.  相似文献   

17.
18.
Scott presents a welcome reply to our article, “A single lineage in early Pleistocene Homo” (Van Arsdale and Wolpoff 2012 ). However, Scott's reply mischaracterizes and fails to directly address the hypothesis of a single lineage that we test. Additionally, the approach taken by Scott fails to replicate the methods used in our analysis. As Scott himself suggests, our null hypothesis of a single evolving lineage in early Homo remains without refutation. Although many evolutionary scenarios might explain the complex pattern of variation present in the early Homo fossil record, the most parsimonious remains that of a single lineage displaying evolutionary change over time.  相似文献   

19.
    
Important changes in the brain have occurred during the course of human evolution. Both absolute and relative size increases can be documented for species of Homo, culminating in the appearance of modern humans. One species that is particularly well-represented by fossil crania is Homo erectus. The mean capacity for 30 individuals is 973 cm(3). Within this group there is substantial variation, but brain size increases slightly in specimens from later time periods. Other Middle Pleistocene crania differ from those of Homo erectus. Characters of the facial skeleton, vault, and cranial base suggest that fossils from sites such as Arago Cave in France, the Sima de los Huesos in Spain, Bodo in Ethiopia, Broken Hill in Zambia, and perhaps Dali in China belong to the taxon Homo heidelbergensis. Ten of these mid-Quaternary hominins have brains averaging 1,206 cm(3) in volume, and many fall beyond the limits of size predicted for Homo erectus of equivalent age. When orbit height is used to construct an index of relative brain size, it is apparent that the (significant) increase in volume documented for the Middle Pleistocene individuals is not simply a consequence of larger body mass. Encephalization quotient values confirm this finding. These changes in absolute and relative brain size can be taken as further corroborative evidence for a speciation event, in which Homo erectus produced a daughter lineage. It is probable that Homo heidelbergensis originated in Africa or western Eurasia and then ranged widely across the Old World. Archaeological traces indicate that these populations differed in their technology and behavior from earlier hominins.  相似文献   

20.
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The cranium found at Bodo of Middle Awash area in Ethiopia is derived from Middle Pleis-tocene deposits with the age about 0.6 Ma. The Bodo cranium is the most complete and oldest Middle Pleistocene human fossil ever found in the world. Because both the morphological features of Homo erectus and Homo sapiens can be identified on the Bodo cranium, the affinity of Bodo cranium has been in debate.Rightmire believes that the Bodo cranium with more resemblance to the archaic Homo sapiens of Broken Hill and Petralona is the representative of the transitions from Homo erectus to archaic Homo sapiens in Africa. At least as early as 0.6 Ma the speciation event of the transition from Homo erectus to the archaic Homo sapiens happened in Africa,which is much earlier than in Asia and Europe. The human fossils represented by the Bodo cranium and otherMiddle Pleistocene specimens form Africa and Europe constitute an assemblage of Homo heidelbergensis,which may be the direct ancestor of later humans. These opinions led to the discussions of the emergence time of the archaic Homo sapiens in Africa and Eurasia, and the relationship between the humans of Middle Pleistocene in Africa and Eurasia.<br>For this background, in this paper the comparisons of morphological features between the Bodo cranium and the Homo erectus of Zhoukoudian were carried out. Out results show that several feature of the Bodo cranium resemble those of Zhoukoudian Homo erectus. Some other features including the cra-nial capacity exhibits the patterns of later Homo sapiens. In its overall morphology, the Bodo cranium seems to be closer to Homo erectus. The authors believe that even though the morphological mosaic pattern of human evolution can be found in the human fossil records of China, the uncertainty of the ages of Chinese human fossils makes no reliable evidence to demonstrate contemporary or earlier occurrence of the mosaic pattern of Homo erectus and archaic Homo sapiens as in Africa. Taking the big time gap of between African and Asian Homo erectus, and the unsynchronism and regional variations of human evolution into considerations, it is possible for the humans with more advanced features first appeared in Africa. Based on the comparisons in the present study, the mosaic patterns in the human evolution, and the differences of the Middle Pleistocene human evolution in Africa and Asia are discussed.  相似文献   

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