Preliminary investigation of dental microstructure in the Yuanmou hominoid (Lufengpithecus hudienensis), Yunnan Province, China

Schwartz, Gary T.; Liu, Wu; Zheng, Liang

doi:10.1016/s0047-2484(02)00197-5

Cited by 54 publications

(47 citation statements)

References 27 publications

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“…However, Dumont (1995) demonstrated that congeneric ceboid and chiropteran species have notably different RET values. A large degree of variation in RET has also been reported in small samples of different species of Proconsul and Lufengpithecus Schwartz et al, 2003;Smith et al, 2003b), which appears similar to or greater than the variation within Pongo reported here.…”

Section: Relative Enamel Thickness Among Hominoidssupporting

confidence: 84%

“…Reported hominoid values from a controlled (physical) plane of section have necessarily been based on small sample sizes (Gantt, 1977;Martin, 1983Martin, , 1985Grine and Martin, 1988;Andrews and Martin, 1991;Macho, 1994;Beynon et al, 1998;Shellis et al, 1998;Grine, 2002;Olejniczak and Martin, 2002;Schwartz et al, 2003;Smith et al, 2003bSmith et al, , 2004Grine, 2005). Previous studies of extant ape molars have produced a maximum reported sample of 17 teeth from seven individuals of a single species (Martin, 1983).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Variation in hominoid molar enamel thickness

Smith

Olejniczak

Martin

et al. 2005

Journal of Human Evolution

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Section: Relative Enamel Thickness Among Hominoidssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Variation in hominoid molar enamel thickness

Smith

Olejniczak

Martin

et al. 2005

Journal of Human Evolution

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“…Another justification for this estimate is body mass. Since striae/perikymata periodicity bears some relationship to body size and clade among primates (e.g., Schwartz et al, 2003;Smith et al, 2004), we consider a value of 2 or 3 days, as reported for Victoriapithecus and Palaeopropithecus, to probably underestimate the true value in Anapithecus. The characteristically short striae/perikymata periodicity of the subfossil prosimian Paleopropithecus is not likely to represent a good model for fossil catarrhine enamel formation.…”

Section: Estimation Of Tooth Formation Timesmentioning

confidence: 99%

Dental development and life history in Anapithecus hernyaki

Nargolwalla

Begun

Dean

et al. 2005

Journal of Human Evolution

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“…Kelley et al (2001) reported developmental similarities among Dryopithecus laietanus, Pan, and P. nyanzae. Schwartz et al (2003) reported differences in both microstructure and enamel thickness between Lufengpithecus lufengensis and L. hudienensis, with the latter showing some similarities to species of Proconsul and Pongo. Additional ongoing work on other Miocene taxa, as well as on a large sample of extant apes, may permit more refined assessment of the significance of comparisons of limited fossil material, as well as on changes in hominoid dental development through time .…”

Section: Introductionmentioning

confidence: 96%

“…Recent work on extant and fossil apes has begun to provide an improved comparative framework to complement the results of studies of fossil hominoids (Beynon et al, 1991a,b;Beynon and Reid, 1995;Reid and Beynon, 1995;Kelley, 1997;Beynon et al, 1998;Dean, 1998;Dean and Shellis, 1998;Dirks, 1998;Reid et al, 1998a;Kelley, 1999;Schwartz et al, 1999;Dean, 2000;Kelley and Bulicek, 2000;Smith and Martin, 2000;Kelley et al, 2001;Schwartz and Dean, 2001;Schwartz et al, 2001a,b;Smith et al, 2001;Dirks, 2002;Kelley and Smith, 2003;Schwartz et al 2003;Smith et al, 2003). Beynon et al (1998) examined the enamel and dentine microstructure of two species of Proconsul from Rusinga Island.…”

Section: Introductionmentioning

confidence: 99%

Enamel thickness, microstructure and development in Afropithecus turkanensis

Smith

Martin

Leakey

2003

Journal of Human Evolution

118

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Afropithecus turkanensis, a 17-17.5 million year old large-bodied hominoid from Kenya, has previously been reported to be the oldest known thick-enamelled Miocene ape. Most investigations of enamel thickness in Miocene apes have been limited to opportunistic or destructive studies of small samples. Recently, more comprehensive studies of enamel thickness and microstructure in Proconsul, Lufengpithecus, and Dryopithecus, as well as extant apes and fossil humans, have provided information on rates and patterns of dental development, including crown formation time, and have begun to provide a comparative context for interpretation of the evolution of these characters throughout the past 20 million years of hominoid evolution. In this study, enamel thickness and aspects of the enamel microstructure in two A. turkanensis second molars were quantified and provide insight into rates of enamel apposition, numbers of cells actively secreting enamel, and the time required to form regions of the crown. The average value for relative enamel thickness in the two molars is 21.4, which is a lower value than a previous analysis of this species, but which is still relatively thick compared to extant apes. This value is similar to those of several Miocene hominoids, a fossil hominid, and modern humans. Certain aspects of the enamel microstructure are similar to Proconsul nyanzae, Dryopithecus laietanus, Lufengpithecus lufengensis, Graecopithecus freybergi and Pongo pygmaeus, while other features differ from extant and fossil hominoids. Crown formation times for the two teeth are 2.4-2.6 years and 2.9-3.1 years respectively. These times are similar to a number of extant and fossil hominoids, some of which appear to show additional developmental similarities, including thick enamel. Although thick enamel may be formed through several developmental pathways, most Miocene hominoids and fossil hominids with relatively thick enamel are characterized by a relatively long period of cuspal enamel formation and a rapid rate of enamel secretion throughout the whole cusp, but a shorter total crown formation time than thinner-enamelled extant apes.

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Preliminary investigation of dental microstructure in the Yuanmou hominoid (Lufengpithecus hudienensis), Yunnan Province, China

Cited by 54 publications

References 27 publications

Variation in hominoid molar enamel thickness

Variation in hominoid molar enamel thickness

Dental development and life history in Anapithecus hernyaki

Enamel thickness, microstructure and development in Afropithecus turkanensis

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