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Pregled bibliografske jedinice broj: 577918

Časopis

Autori: Smith, Tanya; Olejniczak, Anthony; Zermeno, John; Tafforeau, Paul; Skinner, Matthew; Hoffman, Almut; Radovčić, Jakov; Toussaint, Michael; Kruszynski, Robert; Menter, Colin; Moggi-Cecchi, Jacopo; Glasmacher, Ulrich; Kulmer, Ottmar; Schrenk, Friedemann; Stringer, Chris; Hublin, Jean-Jacques
Naslov: Variation in enamel thickness within the genus Homo
Izvornik: Journal of human evolution (0047-2484) 62 (2012), 3; 395-411
Vrsta rada: članak
Ključne riječi: Archaic Homo; Dental morphology; Early Homo; Hominin tooth structure; Human evolution; Neanderthal
Sažetak:
Recent humans and their fossil relatives are classified as having thick molar enamel, one of very few dental traits that distinguish hominins from living African apes. However, little is known about enamel thickness in the earliest members of the genus Homo, and recent studies of later Homo report considerable intra- and inter-specific variation. In order to assess taxonomic, geographic, and temporal trends in enamel thickness, we applied micro-computed tomographic imaging to 150 fossil Homo teeth spanning two million years. Early Homo postcanine teeth from Africa and Asia show highly variable average and relative enamel thickness (AET and RET) values. Three molars from South Africa exceed Homo AET and RET ranges, resembling the hyper thick Paranthropus condition. Most later Homo groups (archaic European and north African Homo, and fossil and recent Homo sapiens) possess absolutely and relatively thick enamel across the entire dentition. In contrast, Neanderthals show relatively thin enamel in their incisors, canines, premolars, and molars, although incisor AET values are similar to H. sapiens. Comparisons of recent and fossil H. sapiens reveal that dental size reduction has led to a disproportionate decrease in coronal dentine compared with enamel (although both are reduced), leading to relatively thicker enamel in recent humans. General characterizations of hominins as having 'thick enamel' thus oversimplify a surprisingly variable craniodental trait with limited taxonomic utility within a genus. Moreover, estimates of dental attrition rates employed in paleodemographic reconstruction may be biased when this variation is not considered. Additional research is necessary to reconstruct hominin dietary ecology since thick enamel is not a prerequisite for hard-object feeding, and it is present in most later Homo species despite advances in technology and food processing.
Projekt / tema: 065-0532400-0412
Izvorni jezik: ENG
Current Contents: DA
Citation Index: DA
Kategorija: Znanstveni
Znanstvena područja:
Stomatologija,Arheologija
Tiskani medij: da
URL Internet adrese: http://www.sciencedirect.com/science/article/pii/S0047248412000036
http://ac.els-cdn.com/S0047248412000036/1-s2.0-S0047248412000036-main.pdf?_tid=46b3132a-dffa-11e2-8df6-00000aab0f27&acdnat=1372427859_f04eea6266c83d801ed2324e56398262
Broj citata:
Altmetric:
DOI: 10.1016/j.jhevol.2011.12.004
OpenURL: http://dx.doi.org/10.1016/j.jhevol.2011.12.004
Google Scholar: Variation in enamel thickness within the genus Homo
Upisao u CROSBI: konjevic@vef.hr (konjevic@vef.hr), 25. Tra. 2012. u 08:56 sati



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