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Paranthropus aethiopicus is represented at LaetoliLaetoli in northern TanzaniaTanzania by an edentulous right maxilla (EP 1500/01). The specimen, recovered from Silal ArtumSilal Artum in the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper (dated to 2.66 Ma), is similar to KNM-WT KNM-WT 1700017000 from West TurkanaWest Turkana. It is the first specimen of P. aethiopicus known from outside theOmo Omo-Turkana BasinTurkana Basin and one of the oldest securely dated specimens attributed to this taxon. Previously, EP 1500/01 was thought to belong to an adult individual, but CTComputed Tomography (CT)-imaging of the root morphologyMorphology shows that it is a late juvenileJuvenile, equivalent in dental developmental stage to modern humans of 12–14 years. A proximal tibia (EP 1000/98) from the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper may belong to the same species, and, if so, it would represent the first postcranial element attributable to P. aethiopicus. However, until additional hominin material is recovered from the Upper Ndolanya BedsUpper Ndolanya Beds EP 1000/98 is best attributed to Hominini gen. et sp. indet. The occurrence of P. aethiopicus in the Upper Ndolanya BedsUpper Ndolanya Beds indicates that by ~ 2.7 Ma the species had attained a relatively wide distribution in eastern AfricaEastern Africa. The first appearance of Paranthropus has been linked to changes in global climate that impacted regional paleoenvironmentsPaleoenvironment in Africa. However, evidence from the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper suggests that changes in the composition of the fauna, including the occurrence of P. aethiopicus, were not accompanied by profound changes in the paleoecologyPaleoecology at LaetoliLaetoli. An understanding of environmental change on a broader regional scale is needed to determine the nature of the underlying factors that led to the origin of Paranthropus.

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Paranthropus aethiopicus at Laetoli and Its Implications for the Biogeography and Evolutionary History of the Genus

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  • 发表日期：

    2026年

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  • Terry Harrison,
  • Amandus Kwekason,
  • Fred Spoor

摘要

Paranthropus aethiopicus is represented at LaetoliLaetoli in northern TanzaniaTanzania by an edentulous right maxilla (EP 1500/01). The specimen, recovered from Silal ArtumSilal Artum in the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper (dated to 2.66 Ma), is similar to KNM-WT KNM-WT 1700017000 from West TurkanaWest Turkana. It is the first specimen of P. aethiopicus known from outside theOmo Omo-Turkana BasinTurkana Basin and one of the oldest securely dated specimens attributed to this taxon. Previously, EP 1500/01 was thought to belong to an adult individual, but CTComputed Tomography (CT)-imaging of the root morphologyMorphology shows that it is a late juvenileJuvenile, equivalent in dental developmental stage to modern humans of 12–14 years. A proximal tibia (EP 1000/98) from the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper may belong to the same species, and, if so, it would represent the first postcranial element attributable to P. aethiopicus. However, until additional hominin material is recovered from the Upper Ndolanya BedsUpper Ndolanya Beds EP 1000/98 is best attributed to Hominini gen. et sp. indet. The occurrence of P. aethiopicus in the Upper Ndolanya BedsUpper Ndolanya Beds indicates that by ~ 2.7 Ma the species had attained a relatively wide distribution in eastern AfricaEastern Africa. The first appearance of Paranthropus has been linked to changes in global climate that impacted regional paleoenvironmentsPaleoenvironment in Africa. However, evidence from the UpperUpper Ndolanya Beds Ndolanya BedsNdolanya Beds, Upper suggests that changes in the composition of the fauna, including the occurrence of P. aethiopicus, were not accompanied by profound changes in the paleoecologyPaleoecology at LaetoliLaetoli. An understanding of environmental change on a broader regional scale is needed to determine the nature of the underlying factors that led to the origin of Paranthropus.