Paleobiological Implications of the Ardipithecus ramidus Dentition

  title={Paleobiological Implications of the Ardipithecus ramidus Dentition},
  author={Gen Suwa and Reiko T. Kono and Scott W. Simpson and Berhane Abrha Asfaw and C. Owen Lovejoy and Tim D. White},
  pages={69 - 99}
The Middle Awash Ardipithecus ramidus sample comprises over 145 teeth, including associated maxillary and mandibular sets. These help reveal the earliest stages of human evolution. Ar. ramidus lacks the postcanine megadontia of Australopithecus. Its molars have thinner enamel and are functionally less durable than those of Australopithecus but lack the derived Pan pattern of thin occlusal enamel associated with ripe-fruit frugivory. The Ar. ramidus dental morphology and wear pattern are… 

The Ardipithecus ramidus Skull and Its Implications for Hominid Origins

The highly fragmented and distorted skull of the adult skeleton ARA-VP-6/500 includes most of the dentition and preserves substantial parts of the face, vault, and base, showing that the Mio-Pliocene hominid cranium differed substantially from those of both extant apes and Australopithecus.

Aspects of mandibular ontogeny in Australopithecus afarensis

The results indicate that A. afarensis resembles humans more than chimpanzees in its percentage of adult corpus breadth attained at successive stages of dental emergence, and is also more similar to humans in corpus cross-sectional shape changes throughout ontogeny.

Ardipithecus ramidus and the Paleobiology of Early Hominids

Ardipithecus ramidus indicates that despite the genetic similarities of living humans and chimpanzees, the ancestor the authors last shared probably differed substantially from any extant African ape.

Anterior dental evolution in the Australopithecus anamensis–afarensis lineage

Dental changes signal selection for altered dietary behaviour and explain some differences in craniofacial form between Au.

Ouranopithecus macedoniensis (Mammalia, Primates, Hominoidea): virtual reconstruction and 3D analysis of a juvenile mandibular dentition (RPl-82 and RPl-83)

ABSTRACT Dental enamel thickness is commonly listed among the diagnostic features for taxonomic assessment and phylogenetic reconstruction in the study of fossil hominids, and is widely used as an

Neanderthal teeth from Moula-Guercy, Ardèche, France.

Dental remains from a Neanderthal fossil assemblage from Moula-Guercy, France are described to reveal numerous characteristics that are diagnostic of Neanderthals and provide no evidence for the presence of any other hominid taxa.

Unexpectedly rapid evolution of mandibular shape in hominins

The evolution of mandibular shape in hominins has strong morpho-functional and ecological significance attached and several factors including the loss of honing complex, canine reduction, and the acquisition of different diets may have concurred in producing such surprisingly high evolutionary rates.

Descriptions of the dental remains of Homo floresiensis

Dental remains of Homo floresiensis excavated during 2002-2004 at Liang Bua, Flores, Indonesia, consist of one partial maxillary dentition, two nearly complete mandibular dentitions, and four

Evolution of the mandibular third premolar crown in early Australopithecus.




Jaws and teeth of Australopithecus afarensis from Maka, Middle Awash, Ethiopia.

The nearly complete and undistorted MAK-VP-1/12 adult mandible from Maka is an excellent match for Hadar and Laetoli counterparts, confirming the geographic and temporal distribution of A. afarensis and shows that this taxon is functionally and developmentally hominid in its incisor/canine/premolar complex.

Relative cheek-tooth size in Australopithecus.

  • H. Mchenry
  • Environmental Science, Geography
    American journal of physical anthropology
  • 1984
Postcanine megadontia in Australopithecus species can also be demonstrated by comparing tooth size and body size in associated skeletons: A. afarensis (represented by A.L. 288-1) has a cheek-tooth size 2.8 times larger than expected from modern hominoids; A.Africanus (Sts 7) and A. robustus (TM 1517) are over twice the expected size.

Dental development in chimpanzees (Pan troglodytes) : The timing of tooth calcification stages

The overall period of canine development in both species is nearly identical, although those for crown and root formation are markedly different-making this tooth the most distinctive feature between chimpanzee and human dental development periods.

Late Miocene Teeth from Middle Awash, Ethiopia, and Early Hominid Dental Evolution

Fossil hominid teeth recovered from Ethiopia's Middle Awash suggest that the last common ancestor of apes and humans had a functionally honing canine–third premolar complex.

Sexual dimorphism in Australopithecus afarensis was similar to that of modern humans

These data eliminate some apparent discrepancies between the canine and skeletal size dimorphism in hominoids, imply that the species was not characterized by substantial sexual bimaturation, and greatly increase the probability that the reproductive strategy of A. afarensis was principally monogamy.

Perikymata spacing and distribution on hominid anterior teeth.

  • M. DeanD. Reid
  • Geography
    American journal of physical anthropology
  • 2001
Preliminary data indicate that differences may exist among the species attributed to early Homo, especially between Homo ergaster and Homo rudolfensis on the one hand, and Homo habilis sensu strico on the other.

Ontogeny of canine dimorphism in extant hominoids.

  • G. SchwartzC. Dean
  • Biology, Environmental Science
    American journal of physical anthropology
  • 2001
The developmental process(es) regulating canine dimorphism in extant hominoids is described, using histological markers of tooth growth, to reconstruct longitudinal growth curves for height attainment in male and female hominoid canines.

New material of the earliest hominid from the Upper Miocene of Chad

New dental and mandibular specimens from three Toros-Menalla fossiliferous localities of the same age are described, including a lower canine consistent with a non-honing C/P3 complex, post-canine teeth with primitive root morphology and intermediate radial enamel thickness, which confirm the morphological differences between S. tchadensis and African apes.

Size variation in the postcranium ofAustralopithecus afarensis and extant species of hominoidea

It is suggested that strong sexual dimorphism in body size is the primitive condition for the large bodied hominoids and in my sample of Amerindians, the capitate and proximal ulna are also strongly dimorphic.

Further evidence on relative dental maturation and somatic developmental rate in hominoids.

Individual bivariate pairings of all mandibular teeth were made for African apes and humans, and no statistically significant differences were found among apes, although a consistent pattern of earlier incisal development was observed in Pan relative to Gorilla.