For Yous Data - Teeth Of Human Being Antecessor Shed Calorie-Free On Trends Inward Pleistocene Hominin Dental Evolution

Some of the dental features characteristic of Neanderthals were already acquaint inwards Early Pleistocene Homo antecessor, according to a report published inwards the open-access magazine PLOS ONE past times Laura Martín-Francés of the University of Bordeaux, French Republic as well as colleagues.

These are enamel thickness cartographies of the H. antecessor upper M1 (ATD6-103) from Gran Dolina (Atapuerca)
compared alongside those of Neanderthal as well as modern human [Credit: Martín-Francés et al., PLOS ONE 2018]

Dental tissue proportions as well as enamel thickness are helpful features for identifying as well as distinguishing ancient hominins, reflecting unique developmental processes that arose inwards amidst hominin species. Neanderthals possess uniquely sparse enamel compared to other hominins, simply the root as well as evolution of this status is unknown.

In this study, Martín-Francés as well as colleagues examined teeth from the Early Pleistocene hominin Homo antecessor, a potential ancestor of Neanderthals, to create upward one's hear when this as well as other Neanderthal tooth features arose.

The authors examined 17 molars of Homo antecessor from the Gran Dolina-TD6 cave site inwards Sierra de Atapuerca inwards Northern Spain, dating dorsum to the Early Pleistocene, 0.8-0.9 ane yard 1000 years ago. They compared these teeth to to a greater extent than than 300 molars from other Homo species, living as well as extinct, from Asia, Africa, as well as Europe.

Through micro-CT scans as well as high-resolution imaging, they determined that H. antecessor did non portion the Neanderthal trait of sparse enamel, simply that the overall distribution of tooth tissues (enamel as well as dentine) inwards H. antecessor was inwards fact to a greater extent than like to Neanderthals than to Homo sapiens as well as other hominins.

These findings advise that for sure aspects of Neanderthal tooth construction had already arisen inwards before hominins of Early Pleistocene Europe, simply that the total suite of Neanderthal traits did non seem until later. The authors banknote that futurity report on hominins across the Early as well as Middle Pleistocene of Europe volition farther elucidate the evolutionary steps that produced the unique dentitions of Late Pleistocene hominins.

Martín-Francés summarizes: "The Early Pleistocene species, Homo antecessor (Atapuerca, Spain) shares the same tooth enamel thickness alongside almost hominins, including Homo sapiens. However, equally early on equally 900,000 ago, Homo antecessor shows a few structural characteristics that are absent inwards the residue of the hominin species as well as volition choke the typical Neanderthal configuration."

Source: PLOS [October 03, 2018]


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