Cross-sectional geometry and morphology of the mandibular symphysis in Middle and Late Pleistocene Homo

2002 ◽  
Vol 43 (1) ◽  
pp. 67-87 ◽  
Author(s):  
Seth D. Dobson ◽  
Erik Trinkaus
1968 ◽  
Vol 5 (6) ◽  
pp. 1467-1488 ◽  
Author(s):  
C. S. Churcher

Five ungulates are reported from gravels comprising the second major terrace above the Bow River's north bank at Cochrane, Alberta. These ungulates are Cervus canadensis (wapiti), Rangifer tarandus (caribou), Ovis canadensis (mountain sheep), Bison occidentalis (extinct western bison), and Equus conversidens (extinct Mexican ass). E. conversidens was previously known from middle and late Pleistocene beds of the southern United States and Mexico and is here reported from the post-Wisconsin Pleistocene of Alberta and possibly Saskatchewan. Radiocarbon analysis of Bison bones from the gravels yielded two dates that averaged 11 065 B.P.


PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4279 ◽  
Author(s):  
Song Xing ◽  
Kristian J. Carlson ◽  
Pianpian Wei ◽  
Jianing He ◽  
Wu Liu

BackgroundRegional diversity in the morphology of theH. erectuspostcranium is not broadly documented, in part, because of the paucity of Asian sites preserving postcranial fossils. Yet, such an understanding of the initial hominin taxon to spread throughout multiple regions of the world is fundamental to documenting the adaptive responses to selective forces operating during this period of human evolution.MethodsThe current study reports the first humeral rigidity and strength properties of East AsianH. erectusand places its diaphyseal robusticity into broader regional and temporal contexts. We estimate true cross-sectional properties of Zhoukoudian Humerus II and quantify new diaphyseal properties of Humerus III using high resolution computed tomography. Comparative data for AfricanH. erectusand Eurasian Late PleistoceneH. sapienswere assembled, and new data were generated from two modern Chinese populations.ResultsDifferences between East Asian and AfricanH. erectuswere inconsistently expressed in humeral cortical thickness. In contrast, East AsianH. erectusappears to exhibit greater humeral robusticity compared to AfricanH. erectuswhen standardizing diaphyseal properties by the product of estimated body mass and humeral length. East AsianH. erectushumeri typically differed less in standardized properties from those of side-matched Late Pleistocene hominins (e.g., Neanderthals and more recent Upper Paleolithic modern humans) than did AfricanH. erectus, and often fell in the lower range of Late Pleistocene humeral rigidity or strength properties.DiscussionQuantitative comparisons indicate that regional variability in humeral midshaft robusticity may characterizeH. erectusto a greater extent than presently recognized. This may suggest a temporal difference withinH. erectus, or possibly different ecogeographical trends and/or upper limb loading patterns across the taxon. Both discovery and analysis of more adultH. erectushumeri are critical to further evaluating and potentially distinguishing between these possibilities.


2019 ◽  
Vol 196 ◽  
pp. 102832 ◽  
Author(s):  
Per Möller ◽  
Ívar Örn Benediktsson ◽  
Johanna Anjar ◽  
Ole Bennike ◽  
Martin Bernhardson ◽  
...  

2017 ◽  
Vol 92 (2) ◽  
pp. 305-312 ◽  
Author(s):  
Fredrick K. Manthi ◽  
Francis H. Brown ◽  
Michael J. Plavcan ◽  
Lars Werdelin

AbstractThe partial skull of a lion from Natodomeri, northwest Kenya is described. The Natodomeri sites are correlated with Member I of the Kibish Formation, dated to between 195 ka and ca. 205 ka. The skull is remarkable for its very great size, equivalent to the largest cave lions (Panthera spelaea [Goldfuss, 1810]) of Pleistocene Eurasia and much larger than any previously known lion from Africa, living or fossil. We hypothesize that this individual represents a previously unknown population or subspecies of lion present in the late Middle and Late Pleistocene of eastern Africa rather than being an indication of climate-driven size increase in lions of that time. This raises questions regarding the extent of our understanding of the pattern and causes of lion evolution in the Late Pleistocene.


2012 ◽  
Vol 91 (1-2) ◽  
pp. 215-222 ◽  
Author(s):  
T. Czudek

AbstractSoft rock pediments developed in South Moravia in some places as early as the Tertiary, in other places as late as the Pleistocene. Depending on local environmental factors the pediments developed either due to backwearing or downwearing. The most suitable conditions for the evolution of the Pleistocene pediments were during transitional periods between warm and cold climate phases and especially during periglacial conditions between cold and warm periods in the Middle and Late Pleistocene. In agricultural landscapes, the studied relief features continue to develop also at present.


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