Visualization of Gubernacular Tract of Transmigrated Canine on CBCT

Chaudhry, Anand P.; Sobti, Geetika

doi:10.14260/jemds/2019/785

Cited by 5 publications

(1 citation statement)

References 13 publications

(9 reference statements)

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“…These holes are identified as the openings of the gubernacular canals which constitute a guide for the eruptive pathway of the developing permanent tooth germs 51 – 55 . These gubernacular foramina observed on GAR IVE have a circular diameter ranging from 0.75 mm to 2.46 mm, which is consistent with the standard values 56 . This normal and developmental structure exists in all vertebrates.…”

Section: Resultssupporting

confidence: 88%

Insights into the palaeobiology of an early Homo infant: multidisciplinary investigation of the GAR IVE hemi-mandible, Melka Kunture, Ethiopia

Cabec

Colard

Charabidzé

et al. 2021

Sci Rep

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Childhood is an ontogenetic stage unique to the modern human life history pattern. It enables the still dependent infants to achieve an extended rapid brain growth, slow somatic maturation, while benefitting from provisioning, transitional feeding, and protection from other group members. This tipping point in the evolution of human ontogeny likely emerged from early Homo. The GAR IVE hemi-mandible (1.8 Ma, Melka Kunture, Ethiopia) represents one of the rarely preserved early Homo infants (~ 3 years at death), recovered in a richly documented Oldowan archaeological context. Yet, based on the sole external inspection of its teeth, GAR IVE was diagnosed with a rare genetic disease–amelogenesis imperfecta (AI)–altering enamel. Since it may have impacted the child’s survival, this diagnosis deserves deeper examination. Here, we reassess and refute this diagnosis and all associated interpretations, using an unprecedented multidisciplinary approach combining an in-depth analysis of GAR IVE (synchrotron imaging) and associated fauna. Some of the traits previously considered as diagnostic of AI can be better explained by normal growth or taphonomy, which calls for caution when diagnosing pathologies on fossils. We compare GAR IVE’s dental development to other fossil hominins, and discuss the implications for the emergence of childhood in early Homo.

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Section: Resultssupporting

confidence: 88%