<i>Papio cynocephalus</i> age determination

Reed, O. M.

doi:10.1002/ajpa.1330380226

Cited by 27 publications

(17 citation statements)

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“…Fukase (2011) showed that symphyseal shape does not differ throughout development even in hamadryas baboons exhibiting extreme dimorphism, indicating a limited effect of the mixed-sex samples on eventual results. Dental age estimation was conducted by referring to previously reported standards or data on tooth formation stages and eruption time for modern humans (Ubelaker, 1989), chimpanzees (Dean and Wood, 1981), baboons (Reed, 1973;Swindler and Meekins, 1991), and macaques (Iwamoto et al, 1984(Iwamoto et al, , 1987Sirianni and Swindler, 1985).…”

Section: Methodsmentioning

confidence: 99%

Interspecies difference in placement of developing teeth and its relationship with cross‐sectional geometry of the mandibular symphysis in four primate species including modern humans

Fukase

2011

American J Phys Anthropol

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The form of the anthropoid mandibular symphysis has recently been addressed in association with spatial requirements for the forming anterior teeth. To evaluate potential relationships between the symphyseal shape and teeth further, the growth patterns of the symphyseal region and the positioning of the tooth crypts were examined using CT data, comparing four primate species (modern humans, chimpanzees, Japanese monkeys, and hamadryas baboons) with varied symphyseal curvature and tooth size. First, results showed that interspecies differences in overall mandibular shape including symphyseal inclination and bicanine width are consistently expressed throughout postnatal ontogeny, although local symphyseal configurations related to the superior transverse torus (STT) tended to change considerably during growth in chimpanzees. Second, the four species were found to exhibit differentiated formation positions of the incisor and canine crypts. In particular, I2 developed between I1 and C in humans with a broad bicanine space and small teeth, whereas it was positioned posterior to I1 and above C in the cercopithecines with an extremely narrow bicanine space. In chimpanzees, despite the large bicanine width, I1 and I2 grew with a large antero-posterior overlap owing to their large size. These results indicate that the dental positioning is determined in concert with the size balance of the available mandibular space and forming teeth. Finally, the positions/contours of I2 crypt were shown to correspond strongly with the STT across the taxa. This suggests that interspecies differences in symphyseal shape should be interpreted partially by the species-specific positional relationships of the developing anterior teeth.

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Section: Methodsmentioning

confidence: 99%

Interspecies difference in placement of developing teeth and its relationship with cross‐sectional geometry of the mandibular symphysis in four primate species including modern humans

Fukase

2011

American J Phys Anthropol

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“…The only longitudinal studies of dental development in chimpanzees of known age (and sex) are two based on the same 16 animals born and raised at Yerkes in the 1940s Riesen, 1945, 1964;Anemone et al, 1991) and one shorter study of eight chimpanzees housed at the Stanford Outdoor Primate Facility (Kraemer et al, 1982). Similar data for other nonhuman primates are nearly as scarce and are limited to Macaca (Hurme and Van Wagenen, 1961;Swindler and Gavan, 1962;Bowen and Koch, 1970;Sirianni and Swindler, 1985); Papio (Reed, 1973;Sigg et al, 1982), Cebus (Fleagle and Schaffler, 19821, Saimiri (Long and Cooper, 1969), and Saguinus (Chase and Cooper, 1969).…”

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Mixed longitudinal study of dental emergence in the chimpanzee, Pan troglodytes (primates, pongidae)

Conroy

Mahoney

1991

American J Phys Anthropol

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KEY WORDS ingGrowth and development, Teeth, Maturation, Ag- ABSTRACTDental emergence ages are examined for a mixed longitudinal sample of 58 chimpanzees of known age and sex (22 males, 36 females) followed over the past 10 years. This study provides the most complete data set currently available on dental emergence in chimpanzees of known age and sex. Summary statistics and cumulative frequency percentiles of emergence ages are presented for both the permanent and the primary teeth. Male and female percentiles are also compared and reveal a number of cases of sexual dimorphism in emergence ages. Comparisons of emergence means reveal some statistically significant differences between upper and lower teeth but not between antimeres in the upper or lower dentition. Kendall's rank correlation coefficient (tau) suggests a correlation in timing between first molar and incisor emergence within individuals. In addition, a significant time lag was observed between first molar and central incisor emergence. A number of emergence sequence polymorphisms are presented as well. These findings provide important baseline information for future studies of chimpanzee growth, development, and demography and also contribute to several current issues in paleoanthropology relating to dental maturation patterns in early hominids.

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“…It provides information about tooth development [Reed, 1973;Godfrey et al, 2001], phylogeny and taxonomy [Hayes et al, 1990;Wood et al, 1991], adaptation [De Gusta et al, 2003] and feeding ecology [Kay, 1975;Teaford and Ungar, 2000] of fossil and extant primate species. Dental size has also been shown to vary between sexes in some primate species [Almquist, 1974;Wood et al, 1991], with sexual differences being particularly remarkable in the canines [Oxnard et al, 1985], but also in the molars [Garn et al, 1966;Cochard, 1987;Teschler-Nicola and Prossinger, 1998].…”

Section: Introductionmentioning

confidence: 99%

Tooth Size Variation Related to Age in Amboseli Baboons

Galbany¹,

Dotras²,

Alberts³

et al. 2011

IJFP

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We measured the molar size from a single population of wild baboons from Amboseli (Kenya), both females (n = 57) and males (n = 50). All the females were of known age; the males represented a mix of known-age individuals (n = 31) and individuals with ages estimated to within 2 years (n = 19). The results showed a significant reduction in the mesiodistal length of teeth in both sexes as a function of age. Overall patterns of age-related change in tooth size did not change whether we included or excluded the individuals of estimated age, but patterns of statistical significance changed as a result of changed sample sizes. Our results demonstrate that tooth length is directly related to age due to interproximal wearing caused by M2 and M3 compression loads. Dental studies in primates, including both fossil and extant species, are mostly based on specimens obtained from osteological collections of varying origins, for which the age at death of each individual in the sample is not known. Researchers should take into account the phenomenon of interproximal attrition leading to reduced tooth size when measuring tooth length for ondontometric purposes.

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Papio cynocephalus age determination

Cited by 27 publications

References 0 publications

Interspecies difference in placement of developing teeth and its relationship with cross‐sectional geometry of the mandibular symphysis in four primate species including modern humans

Interspecies difference in placement of developing teeth and its relationship with cross‐sectional geometry of the mandibular symphysis in four primate species including modern humans

Mixed longitudinal study of dental emergence in the chimpanzee, Pan troglodytes (primates, pongidae)

Tooth Size Variation Related to Age in Amboseli Baboons

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