Abstract：
:Teeth grow incrementally and preserve within them a record of that incremental growth in the form of microscopic growth lines. Studying dental development in extinct and extant primates, and its relationship to adult brain and body size as well as other life history and ecological parameters (e.g., diet, somatic growth rates, gestation length, age at weaning), holds the potential to yield unparalleled insights into the life history profiles of fossil primates. Here, we address the absolute pace of dental development in Megaladapis edwardsi, a giant extinct lemur of Madagascar. By examining the microstructure of the first and developing second molars in a juvenile individual, we establish a chronology of molar crown development for this specimen (M1 CFT = 1.04 years; M2 CFT = 1.42 years) and determine its age at death (1.39 years). Microstructural data on prenatal M1 crown formation time allow us to calculate a minimum gestation length of 0.54 years for this species. Postnatal crown and root formation data allow us to estimate its age at M1 emergence (approximately 0.9 years) and to establish a minimum age for M2 emergence (>1.39 years). Finally, using reconstructions or estimates (drawn elsewhere) of adult body mass, brain size, and diet in Megaladapis, as well as the eruption sequence of its permanent teeth, we explore the efficacy of these variables in predicting the absolute pace of dental development in this fossil species. We test competing explanations of variation in crown formation timing across the order Primates. Brain size is the best single predictor of crown formation time in primates, but other variables help to explain the variation.
journal_name
J Hum Evoljournal_title
Journal of human evolutionauthors
Schwartz GT,Mahoney P,Godfrey LR,Cuozzo FP,Jungers WL,Randria GFdoi
10.1016/j.jhevol.2005.08.006subject
Has Abstractpub_date
2005-12-01 00:00:00pages
702-21issue
6eissn
0047-2484issn
1095-8606pii
S0047-2484(05)00149-1journal_volume
49pub_type
杂志文章abstract：:Placing the biological adaptations of Pleistocene hominins within a well-resolved ecological framework has been a longstanding goal of paleoanthropology. This effort, however, has been challenging due to the discontinuous nature of paleoecological data spanning many important periods in hominin evolution. Sediments fr...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2017.06.007
更新日期：2017-11-01 00:00:00
abstract：:We describe here the well-preserved dentognathic remains of an Afropithecus individual from the early Miocene site of Kalodirr in northern Kenya. The specimen includes a nearly complete dentition in which most of the crowns are undamaged and unworn. The new information gleaned from this specimen adds to our knowledge ...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2013.05.001
更新日期：2013-08-01 00:00:00
abstract：:An enamel fragment from the Border Cave 5 specimen was analysed with non-destructive ESR combined with laser ablation ICP-MS for uranium profiling. We obtained an age of 74+/-5 ka which fits exactly into the chronological framework that has been previously established for Border Cave by a variety of dating techniques....
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/s0047-2484(03)00102-7
更新日期：2003-08-01 00:00:00
abstract：:Archaeological excavations at the DK site in the eastern Olduvai Basin, Tanzania, age-bracketed between ∼1.88 Ma (Bed I Basalt) and ∼1.85 Ma (Tuff IB), record the oldest lahar inundation, modification, and preservation of a hominin "occupation" site yet identified. Our landscape approach reconstructs environments and ...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2017.11.011
更新日期：2018-03-01 00:00:00
abstract：:Australopithecus anamensis, among the earliest fully bipedal hominin species, lived in eastern Africa around 4 Ma. Much of what is currently known about the paleoecology of A. anamensis comes from the type locality, Kanapoi, Kenya. Here, we extend knowledge of the range of environments occupied by A. anamensis by pres...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2020.102928
更新日期：2021-01-12 00:00:00
abstract：:The recently extinct large-bodied New World monkey Protopithecus brasiliensis Lund 1836 was named based on a distal humerus and proximal femur found in the Lagoa Santa cave system in the southeastern Brazilian state of Minas Gerais. These bones are from an animal about twice the size of the largest extant platyrrhines...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2013.07.008
更新日期：2013-10-01 00:00:00
abstract：:Little ontogenetic data exist to indicate whether muscular organization of neonates reflects adult locomotion (e.g., leaping) or infant activities like clinging or the initial quadrupedal phase of locomotion that typifies most infant primates. In the present study, five species of primates with contrasting modes of lo...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2006.08.009
更新日期：2007-03-01 00:00:00
abstract：:Although Neandertals are the best-known fossil hominins, the tempo and evolutionary processes in their lineage are strongly debated. This is in part due to the scarcity of the fossil record, in particular before the marine isotopic stage (MIS) 5. In 2010, a partial hominin mandible was discovered at the Middle Paleoli...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2020.102775
更新日期：2020-07-01 00:00:00
abstract：:The size of the infraorbital foramen (IOF) is correlated with the size of the infraorbital nerve and number of mystacial vibrissae in mammals. Accordingly, IOF cross-sectional area has been used to infer both the rostral mechanoreceptive acuity and phylogenetic relationships of extinct crown primates and plesiadapifor...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2017.01.017
更新日期：2017-04-01 00:00:00
abstract：:The Sahara Desert episodically became a space available for hominins in the Pleistocene. Mostly, desert conditions prevailed during the interpluvial periods, which were only periodically interrupted by enhanced precipitation during pluvial or interglacial periods. Responding to Quaternary climatic changes, hominin dis...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2019.01.004
更新日期：2019-05-01 00:00:00
abstract：:The fossil calvaria known as the Mojokerto child's skull was discovered in 1936, but uncertainties have persisted about its paleoenvironmental context and geological age because of difficulties in relocating the discovery site. Past relocation efforts were hindered by inaccuracies in old base maps, intensive post-1930...
journal_title：Journal of human evolution
pub_type： 历史文章,杂志文章
doi：10.1016/j.jhevol.2005.11.002
更新日期：2006-04-01 00:00:00
abstract：:Dolichocebus is known from the type skull encased in a concretion, numerous isolated teeth, parts of two mandibles, and a talus. The specimens come from the Trelew Member (early Miocene, Colhuehuapian South American Land Mammal Age) of the Sarmiento Formation near the village of Gaiman, Chubut Province, Argentina, dat...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2007.09.002
更新日期：2008-03-01 00:00:00
abstract：:Approximately 90% of the human population is right-handed. The emergence of this hand preference in humans is thought to be linked to the ability to execute complex tasks and habitual bipedalism. In order to test these hypotheses, the present study explored, for the first time, hand preference in relation to both body...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2015.02.015
更新日期：2015-05-01 00:00:00
abstract：:Africa's southern Cape is a key region for the evolution of our species, with early symbolic systems, marine faunal exploitation, and episodic production of microlithic stone tools taken as evidence for the appearance of distinctively complex human behavior. However, the temporally discontinuous nature of this evidenc...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2017.09.006
更新日期：2018-01-01 00:00:00
abstract：:It has been proposed that Neandertals had about 30% higher gross cost of transport than anatomically modern humans (AMH) and that such difference implies higher daily energy demands and reduced foraging ranges in Neandertals. Thus, reduced walking economy could be among the factors contributing to the Neandertals' los...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2013.09.011
更新日期：2014-02-01 00:00:00
abstract：:Bone surface modifications have become important indicators of hominin behavior and ecology at prehistoric archaeological sites. However, the method by which we identify and interpret these marks remains largely unchanged despite decades of research, relying on qualitative criteria and lacking standardization between ...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2016.10.002
更新日期：2017-01-01 00:00:00
abstract：:Recent studies have revealed interesting differences in upper first molar morphology across the hominin fossil record, particularly significant between H. sapiens and H. neanderthalensis. Usually these analyses have been performed by means of classic morphometric methods, including the measurement of relative cusp are...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2007.02.002
更新日期：2007-09-01 00:00:00
abstract：:The aim of this study is to describe the environments where the cercopithecid Mesopithecus was found during latest Miocene in Europe. For this purpose, we investigate the paleoecology of the herbivorous ungulate mesofauna of three very rich late Miocene fossil localities from southwestern Bulgaria: Hadjidimovo, Kalima...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2012.04.007
更新日期：2012-07-01 00:00:00
abstract：:Primate species typically differ from other mammals in having bony canals that enclose the branches of the internal carotid artery (ICA) as they pass through the middle ear. The presence and relative size of these canals varies among major primate clades. As a result, differences in the anatomy of the canals for the p...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2016.06.002
更新日期：2016-08-01 00:00:00
abstract：:The Xujiayao site in the Nihewan Basin (North China) is one of the most important Paleolithic sites in East Asia. Twenty Homo fossils, which were previously assigned to an archaic Homo sapiens group, have been excavated along with more than 30,000 lithic artifacts and ∼5000 mammalian fossil specimens. Dating of the Xu...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2017.01.014
更新日期：2017-05-01 00:00:00
abstract：:Late Pleistocene extinctions are of interest to paleontological and anthropological research. In North America and Australia, human occupation occurred during a short period of time and overexploitation may have led to the extinction of mammalian megafauna. In northern Eurasia megafaunal extinctions are believed to ha...
journal_title：Journal of human evolution
pub_type： 历史文章,杂志文章
doi：10.1016/j.jhevol.2007.09.024
更新日期：2008-06-01 00:00:00
abstract：:Sexual dimorphism is an important component of the total variation seen in populations and plays a key role in taxonomic debates. In this study, microtomographic (microcomputed tomography) techniques were applied to a sample of hominin teeth from the Sima de los Huesos site (Spain). Dental tissue proportions of the pe...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2020.102793
更新日期：2020-07-01 00:00:00
abstract：:Feeding systems and behaviors must evolve to satisfy the metabolic needs of organisms. This includes modifications to feeding systems as body size and metabolic needs change. Using our own data and data from the literature, we examine how size-related changes in metabolic needs are met by size-related changes in daily...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2009.02.007
更新日期：2009-06-01 00:00:00
abstract：:In order to resolve long-standing issues surrounding the age of the Skhul early modern humans, new analyses have been conducted, including the dating of four well-provenanced fossils by ESR and U-series. If the Skhul burials took place within a relatively short time span, then the best age estimate lies between 100 an...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2005.04.006
更新日期：2005-09-01 00:00:00
abstract：:The Regourdou 1 partial skeleton was found in 1957 in level IV of the eponymous site located in Montignac-sur-Vézère (Dordogne, France) and until now it has been only partially published. The ongoing revision of the faunal remains from the site has yielded additional fossils that pertain to this skeleton. Here we stud...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2013.02.006
更新日期：2013-06-01 00:00:00
abstract：:When measured as a ratio of mean midshaft diameter to bone length, the OH 8 fossil hominin foot exhibits a metatarsal (Mt) robusticity pattern of 1 > 5 > 3 > 4 > 2, which differs from the widely perceived "common" modern human pattern (1 > 5 > 4 > 3 > 2); African apes generally exhibit a third pattern (1 > 2 > 3 > 4 >...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2018.02.013
更新日期：2018-08-01 00:00:00
abstract：:Dental development was reconstructed in several individuals representing four species of catarrhine primates--Symphalangus syndactylus, Hylobates lar, Semnopithecus entellus priam, and Papio hamadryas--using the techniques of dental histology. Bar charts assumed to represent species-typical dental development were con...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2007.04.007
更新日期：2007-09-01 00:00:00
abstract：:It has been argued that changes in the relative sizes of visual system structures predated an increase in brain size and provide evidence of brain reorganization in hominins. However, data about the volume and anatomical limits of visual brain structures in the extant taxa phylogenetically closest to humans-the apes-r...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2009.11.011
更新日期：2010-04-01 00:00:00
abstract：:A new species of Homo, Homo naledi, was described in 2015 based on the hominin skeletal remains from the Dinaledi Chamber of the Rising Star cave system, South Africa. Subsequent craniodental comparative analyses, both phenetic and cladistic, served to support its taxonomic distinctiveness. Here we provide a new quant...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2018.05.007
更新日期：2018-09-01 00:00:00
abstract：:A well-preserved sequence of Early Upper Paleolithic (EUP) occupations has been revealed in the past decade in Manot Cave, the studies of which shed light on the cultural dynamics and subsistence patterns and paleoenvironment. Most intriguing is the series of overlying Levantine Aurignacian occupation layers, exposed ...
journal_title：Journal of human evolution
pub_type： 杂志文章
doi：10.1016/j.jhevol.2019.102705
更新日期：2019-12-24 00:00:00
