Retrieving chronological age from dental remains of early fossil hominins to reconstruct human growth in the past

Philosophical Transactions of the Royal Society B: Biological Sciences

Volumn 365, Issue 1556, 2010, Pages 3397-3410

  Dean, M Christopher ^a  

^a UNIVERSITY COLLEGE LONDON   (United Kingdom)

Author keywords

Dental development; Dentine; Enamel; Hominin evolution; Incremental markings; Tooth root growth

Indexed keywords

AGE DETERMINATION; BIOLOGICAL DEVELOPMENT; CHRONOLOGY; DENTITION; FOSSIL RECORD; GROWTH RATE; HOMINID; HUMAN EVOLUTION; PALEONTOLOGY; RECONSTRUCTION;

HOMINIDAE; PAN TROGLODYTES;

EID: 77958045094     PISSN: 09628436     EISSN: 14712970     Source Type: Journal    
DOI: 10.1098/rstb.2010.0052     Document Type: Review

References (111)

1. Aiello, L. C., Montgomery, C. & Dean, C. 1991 The natural history of deciduous tooth attrition in hominoids. J. Hum. Evol. 21, 397-412. (doi:10.1016/0047-2484 (91) 90114-B)
2. Alemseged, Z., Spoor, F., Kimbel, W. H., Bobe, R., Geraads, D., Reed, D. & Wynn, J. 2006 Juvenile early hominin skeleton from Dikika, Ethiopia. Nature 443, 296-301. (doi:10.1038/nature05047) (Pubitemid 44435143)
3. Anemone, R. L. 1995 Dental development in chimpanzees of known chronological age; implications for understanding the age at death of Plio-Pleistocene hominids. In Aspects of dental biology; palaeontology, anthropology and evolution (ed. J. Moggi-Cecchi), pp. 201-215. Florence, Italy: International Institute for the Study of Man.
4. Anemone, R. L. & Watts, E. S. 1992 Dental development in apes and humans: a comment on Simpson, Lovejoy and Meindl (1990). J. Hum. Evol. 22, 149-153. (doi:10. 1016/0047-2484 (92) 90035-8)
5. Anemone, R. L., Watts, E. S. & Swindler, D. R. 1991 Dental development of known age chimpanzees Pan troglodytes (Primates, Pongidae). Am. J. Phys. Anthropol. 86, 229-241. (doi:10.1002/ajpa.1330860211)
6. Antoine, D., Hillson, S. & Dean, M. C. 2009 The developmental clock of dental enamel: a test for the periodicity of prism cross-striations and an evaluation of the likely sources of error in histological studies of this kind. J. An at. 214, 45-55. (doi:10.1111/j.1469-7580.2008.01010.x)
7. Bennejeant, C. 1940 La chronologie de la dentition chez les anthropoids. Mammalia 4, 41-45. (doi:10.1515/mamm. 1940.4.2.41)
8. Beynon, A. D. & Wood, B. A. 1987 Patterns and rates of molar crown formation times in East African fossil hominids. Nature 326, 493-496. (doi:10.1038/326493a0)
9. Beynon, A. D., Dean, M. C. & Reid, D. J. 1991 Histological study on the chronology of the developing dentition in gorilla and orangutan. Am. J. Phys. Anthropol. 86, 189-203. (doi:10.1002/ajpa.1330860208)
10. Beynon, A. D., Clayton, C. B., Ramirez Rozzi, F. V. & Reid, D. J. 1998 Radiographic and histological methodologies in estimating the chronology of crown development in modern humans and great apes; a review, with some applications for studies on juvenile hominids. J. Hum. Evol. 35, 351-370. (doi:10.1006/jhev. 1998.0234)
11. Boyde, A. 1963 Estimation of age at death of young human skeletal remains from incremental lines in dental enamel. Third Int. Meeting in Forensic Immunology, Medicine, Pathology and Toxicology, April 16th-24th, Excerpta Medica (Int. Congress Series no. 80) Plenary Session IIA, London, pp. 36-46.
12. Boyde, A. 1964 The structure and development of mammalian enamel. PhD Thesis, University of London, London, UK.
13. Boyde, A. 1976 Amelogenesis and the structure of enamel. In Scientific foundations of dentistry (eds B. Cohen & I. R. H. Kramer), pp. 335-352. London, UK: W. Heinemann Medical Books Ltd.
14. Boyde, A. 1979 Carbonate concentration, crystal centres, core dissolution, caries, cross striation, circadian rhythms and compositional contrast in the SEM. J. Dent. Res. 58 b, 981-983.
15. Boyde, A. 1989 Enamel. In Handbook of microscopic anatomy. Vol. 2: Teeth (eds A. Oksche & L. Vollrath), pp. 309-473. Berlin, Germany: Springer.
16. Boyde, A. 1990a Developmental interpretations of dental microstructure. In Primate life history and evolution: monographs in primatology, vol. 14 (ed. C. Jean De Rousseau), pp. 229-267. New York, NY: Wiley-Liss Inc.
17. Boyde, A. 1990b Confocal optical microscopy. In Modern microscopies: techniques and applications (eds P. J. Duke & A. G. Michette), pp. 185-204. New York, NY: Plenum Press.
18. Bradley, B. J. 2008 Reconstructing phylogenies and phenotypes: a molecular view of human evolution. J. Anat. 212, 337-353. (doi:10.1111/j.1469- 7580.2007.00840.x) (Pubitemid 352024462)
19. Bromage, T. G. 1991 Enamel incremental periodicity in the pig-tailed macaque; a polychrome fluorescent labelling study of dental hard tissues. Am. J. Phys. Anthropol. 86, 205-214. (doi:10.1002/ajpa.1330860209)
20. Bromage, T. G. & Dean, M. C. 1985 Re-evaluation of the age at death of immature fossil hominids. Nature 317, 525-527. (doi:10.1038/317525a0)
21. Bromage, T. G. et al. 2009 Lamellar bone is an incremental tissue reconciling enamel rhythms, body size and organismal life history. Cal. Tissue Int. 84, 388-404. (doi:10.1007/s00223-009-9221-2)
22. Clements, E. M. B. & Zuckerman, S. 1953 The order of eruption of the permanent teeth in the Hominoidea. Am. J. Phys. Anthropol. 11, 313-337. (doi:10.1002/ajpa. 1330110309)
23. Conroy, G. C. & Vannier, M. W. 1991a Dental development in South African australopithecines. Part I: problems of pattern and chronology. Am. J. Phys. Anthropol. 86, 121-136. (doi:10.1002/ajpa.1330860204)
24. Conroy, G. C. & Vannier, M. W. 1991b Dental development in South African australopithecines. Part II: dental stage assessment. Am. J. Phys. Anthropol. 86, 137-156. (doi:10.1002/ajpa.1330860205)
25. Dean, M. C. 1985 Variation in the developing root cone angle of the permanent mandibular teeth of modern man and certain fossil hominids. Am. J. Phys. Anthropol. 68, 233-238. (doi:10.1002/ajpa.1330680210) (Pubitemid 16220893)
26. Dean, M. C. 1987 The dental developmental status for six East African juvenile hominids. J. Hum. Evol. 16, 197-213. (doi:10.1016/0047-2484 (87) 90076-5)
27. Dean, M. C. 2000 Progress in understanding hominoid dental development. J. Anat. 197, 77-101. (doi:10. 1046/j.1469-7580.2000.19710077.x)
28. Dean, M. C. 2006 Tooth microstructure tracks the pace of human life history evolution. Proc. R. Soc. B 273, 2799-2808. (doi:10.1098/rspb.2006.3583) (Pubitemid 44764363)
29. Dean, M. C. 2009 Growth in tooth height and extension rates in modern human and fossil hominin canines and molars. In Frontiers of oral biology; interdisciplinary dental morphology (eds T. Koppe, G. Meyer & K. W. Alt), pp. 68-73. Basel, Switzerland: Karger.
30. Dean, M. C. In press. Daily rates of dentine formation and root extension rates in Paranthropus boisei, KNM-ER 1817, from Koobi Fora, Kenya. In African Genesis Symp. Proc. (eds S. Reynolds & C. Menter). South Africa: University of Witwatersrand Press.
31. Dean, M. C. & Reid, D. J. 2001 Anterior tooth formation times in Australopithecus and Paranthropus. In Twelfth Int. Symp. on Dental Morphology (ed. A. Brooks), pp. 135-149. Sheffied, UK: Sheffield Academic Press.
32. Dean, M. C. & Smith, B. H. 2009 Growth and development in the Nariokotome Youth, KNM-WT 15000. In The first humans: origin of the genus Homo (eds F. E. Grine, J. C. Fleagle & R. E. Leakey), pp. 101-120. New York, NY: Springer.
33. Dean, M. C. & Wood, B. A. 1981 Developing pongid dentition and its use for ageing individual crania in comparative cross-sectional growth studies. Folia Primatol. 36, 111-127. (doi:10.1159/000156011)
34. Dean, M. C. & Wood, B. A. 2003 A digital radiographic atlas of the great ape skull and dentition. In Digital archives of human paleobiology (eds L. Bondioli & R. Macchiarelli). Milano, Italy: ADS Solutions/Consiglio Nazionale delle Ricerche.
35. Dean, M. C., Beynon, A. D., Thackeray, J. F. & Macho, G. A. 1993 Histological reconstruction of dental development and age at death of a juvenile Paranthropus robustus specimen, SK 63, from Swartkrans, South Africa. Am. J. Phys. Anthropol. 91, 401-419. (doi:10.1002/ajpa. 1330910402)
36. Dean, M. C., Leakey, M. G., Reid, D. J., Schrenk, F., Schwartz, G. T., Stringer, C. & Walker, A. 2001 Growth processes in teeth distinguish modern humans from Homo erectus and earlier hominins. Nature 414, 628-631. (doi:10.1038/414628a) (Pubitemid 33151256)
37. Fooden, J. & Izor, R. J. 1983 Growth curves, dental emergence norms, and supplementary morphological observations on known-age captive orangutans. Am, J. Primatol. 5, 285-301. (doi:10.1002/ajp. 1350050402)
38. Goodman, M., Bailey, W. J., Hayasaka, K., Stanhope, M. J., Slightom, J. & Czelusniak, J. 1994 Molecular evidence on primate phylogeny from DNA sequences. Am. J. Phys Anthropol. 94, 3-24. (doi:10.1002/ajpa.1330940103)
39. Hess, A. F., Lewis, J. M. & Roman, B. 1932 A radiographic study of calcification of the teeth from birth to adolescence. Dent. Cosmos 74, 1053-1061.
40. Humphrey, L. T. 2010 Weaning behaviour in human evolution. Semin. Cell Dev. Biol. 21, 453-461.
41. Humphrey, L. T., Dean, M. C., Jeffries, T. E. & Penn, M. 2008 Unlocking evidence of early diet from tooth enamel. Proc. Natl Acad. Sci. USA 105, 6834-6839. (doi:10.1073/pnas.0711513105) (Pubitemid 351754491)
42. Kahumbu, P. & Ely, R. M. 1991 Teeth emergence in wild olive baboons in Kenya and formulation of a dental schedule for ageing wild baboon populations. Am. J. Primatol. 23, 1-9. (doi:10.1002/ajp. 1350230102)
43. Keith, A. 1899 On the chimpanzees and their relationship to the gorilla. Proc. Zool. Soc. Lond. 67, 296-312. (doi:10. 1111/j.1469-7998.1899.tb06859.x)
44. Kelley, J. 1997 Paleobiological and phylogenetic significance of life history in Miocene hominoids. In Function, phylogeny, and fossils: miocene hominoid evolution and adaptations (eds D. R. Begun, C. V. Ward & M. D. Rose), pp. 173-208. New York, NY: Plenum Press.
45. Kelley, J. 2002 Life history evolution in Miocene and extant apes. In Human evolution through developmental change (eds N. Minugh-Purvis & K. J. McNamara), pp. 223-248. Baltimore, MD: Johns Hopkins University Press.
46. Kelley, J. & Schwartz, G. T. 2009 Dental development and life history in living African and Asian apes. Proc. Natl Acad. Sci. USA 107, 1035-1040. (doi:10.1073/pnas. 0906206107)
47. Kelley, J. & Smith, T. M. 2003 Age at first molar emergence in early Miocene Afropithecus turkanensis and life-history evolution in the Hominoidea. J. Hum. Evol. 44, 307-329. (doi:10.1016/S0047-2484 (03) 00005-8)
48. Kelley, J., Dean, M. C. & Ross, S. 2009 Root growth during molar eruption in extant great apes. In Frontiers of oral biology; interdisciplinary dental morphology (eds T. Koppe, G. Meyer & K. W. Alt), pp. 128-133. Basel, Switzerland: Karger.
49. Krogman, W. M. 1930 Studies in growth changes in the skull and face of anthropoids. I. The eruption of teeth in anthropoids and Old World apes. Am. J. Anat. 46, 303-313. (doi:10.1002/aja.1000460205)
50. Kronfeld, R. 1935 Development and calcification of the human deciduous and permanent dentition. The Bur 35, 18-25.
51. Kuykendall, K. L. 1996 Dental development in chimpanzees (Pan troglodytes): the timing of tooth calcification stages. Am. J. Phys. Anthropol. 99, 135-157. (doi:10.1002/(SICI) 1096-8644 (199601) 99:1, 135::AID-AJPA8.3.0. CO;2-#)
52. Kuykendall, K. L. 2001 On radiographic and histological methods for assessing dental development in chimpanzees: comments on Beynon et al. (1998) and Reid et al. (1998). J. Hum. Evol. 40, 67-76. (doi:10.1006/jhev. 2000.0445)
53. Kuykendall, K. L., Mahoney, C. J. & Conroy, G. C. 1992 Probit and survival analysis of tooth emergence ages in a mixed-longitudinal sample of chimpanzees (Pan troglodytes). Am. J. Phys. Anthropol. 89, 379-399. (doi:10.1002/ajpa.1330890310)
54. Lacruz, R. S. 2006 Enamel microstructure of the hominid KB 5223 from Kromdraai, South Africa. Am. J. Phys. Anthropol. 132, 175-182. (doi:10.1002/ajpa.20506)
55. Lacruz, R. S., Ramirez Rozzi, F. & Bromage, T. G. 2005 Dental enamel hypoplasia, age at death, and weaning in the Taung child. S. Afr. J. Sci. 101, 567-569.
56. Lacruz, R. S., Ramirez Rozzi, F. & Bromage, T. G. 2006 Variation in enamel development of South African fossil hominids. J. Hum. Evol. 51, 580-590. (doi:10.1016/j. jhevol. 2006.05.007)
57. Lacruz, R. S., Dean, M. C., Ramirez Rozzi, F. & Bromage, T. G. 2008 Megadontia, striae periodicity and patterns of enamel secretion in Plio-Pleistocene fossil hominins. J. Anat. 213, 148-158. (doi:10.1111/j.1469- 7580.2008. 00938.x)
58. Lacruz, R. S. & Ramirez Rozzi, F. V. 2010 Molar crown development in Australopithecus afarensis. J. Hum. Evol. 58, 201-206. (doi:10.1016/j.jhevol. 2009.11.007)
59. Lilly, A. A., Mehlmann, P. T. & Doran, D. 2002 Intestinal parasites in gorillas, chimpanzees and humans at Mondika Research Site, Dzanga-Ndoki National Park, Central African Republic. Int. J. Primatol. 23, 555-573. (doi:10.1023/A:1014969617036) (Pubitemid 34463741)
60. Lippert, W. 1977 Erfahrungen bei der Aufzucht von Orang-Utans (Pongo pygmaeus) im Tierpark Berlin. der Zoologische Garten (N. F.) 47, 209-225.
61. Liversidge, H. M. 2009 Permanent tooth formation as a method of estimating age. In Frontiers of oral biology; interdisciplinary dental morphology (eds T. Koppe, G. Meyer & K. W. Alt), pp. 153-157. Basel, Switzerland: Karger.
62. Mahoney, P. 2008 Intraspecific variation in M1 enamel development in modern humans: implications for human evolution. J. Hum. Evol. 55, 130-146.
63. Marzke, M. W., Young, D. L., Hawkey, D. E., Su, S. M., Fritz, J. & Alford, P. L. 1996 Comparative analysis of weight gain, hand/wrist maturation, and dental emergence rates in chimpanzees aged 0-24 months from varying captive environments. Am. J. Phys. Anthropol. 99, 175-190. (doi:10.1002/(SICI) 1096-8644 (199601) 99:1, 175::AID-AJPA10.3.0. CO;2-K)
64. Moggi-Cecchi, J., Tobias, P. V. & Beynon, A. D. 1998 The mixed dentition and associated skull fragments of a juvenile fossil hominid from Sterkfontein, South Africa. Am J. Phys. Anthropol. 106, 425-465. (doi:10.1002/(SICI) 1096-8644 (199808) 106:4, 425::AID-AJPA2.3.0. CO;2-I)
65. Moggi-Cecchi, J., Mentor, C., Boccone, S. & Keyser, A. 2010 Early hominin dental remains from the Plio-Pleistocene site of Drimolen, South Africa. J. Hum. Evol. 58, 374-405. (doi:10.1016/j.jhevol. 2010.01.006)
66. Moxham, B. J. & Berkovitz, B. K. B. 1974 The circumnatal dentitions of a gorilla (Gorilla gorilla) and a chimpanzee (Pan troglodytes). J. Zool. Lond. 173, 271-276. (doi:10. 1111/j.1469-7998.1974.tb03137.x)
67. Nissen, H. W. & Riesen, A. H. 1945 The deciduous dentition of the chimpanzee. Growth 9, 265-274.
68. Nissen, H. W. & Riesen, A. H. 1964 The eruption of the permanent dentition of chimpanzees. Am. J. Phys. Anthropol. 22, 285-294. (doi:10.1002/ajpa.1330220315)
69. Oka, S. W. & Kraus, B. S. 1969 The circumnatal status of molar crown maturation among the hominoidea. Archs. Oral Biol. 14, 639-659. (doi:10.1016/0003-9969 (69) 90187-3)
70. Phillips-Conroy, J. & Jolly, C. 1988 Dental eruption schedules of wild and captive baboons. Am. J. Primatol. 15, 17-29. (doi:10.1002/ajp. 1350150104)
71. Preiswerk, G. 1895 Beiträge zur Kenntniss de Schmelzstrustur bei Säugethieren mit besonderer berücksichtigung der Ungulaten. Basel, Switzerland: Akadenische Buchhandlung. C. F. Lendorff.
72. Rak, Y., Ginzburg, A. & Geffen, E. 2007 Gorilla-like anatomy on Australopithecus afarensis mandibles suggests Au. afarensis link to robust australopiths. Proc. Natl Acad. Sci. 104, 6568-6572. (doi:10.1073/pnas. 0606454104) (Pubitemid 47175541)
73. Ramirez Rozzi, F. V. 1993 Tooth development in East African Paranthropus. J. Hum. Evol. 24, 429-454. (doi:10.1006/jhev. 1993.1030)
74. Ramirez Rozzi, F. V. 1995 Time of crown formation in Plio-Pleistocene hominid teeth. In Aspects of dental biology; palaeontology, anthropology and evolution. (ed. J. Moggi-Cecchi), pp. 217-238. Florence, Italy: International Institute for the Study of Man.
75. Reid, D. J. & Dean, M. C. 2005 Variation in modern human enamel formation times. J. Hum. Evol. 50, 329-346. (doi:10.1016/j.jhevol. 2005.09.003)
76. Reid, D. J., Schwartz, G. T., Dean, M. C. & Chandrasekera, M. S. 1998 A histological reconstruction of dental development in the common chimpanzee, Pan troglodytes. J. Hum. Evol 35, 427-448. (doi:10.1006/jhev. 1998.0248)
77. Reid, D. J., Hillson, S. & Dean, M. C. 2000 Defining chronological growth standards for known fractions of tooth crown height in primate anterior teeth. Am. J. Phys. Anthropol. Suppl. 30, 260.
78. Retzius, A. 1837 Bemerkungen über den inneren Bau der Zähne, mit besonderer Rücksicht auf dem in Zahnknochen vorkommenden Röhrenbau. (Müllers). Arch. Anat. Physiol. 1837, 486-566.
79. Risnes, S. 1986 Enamel apposition rate and the prism periodicity in human teeth. Scand. J. Dent. Res. 94, 394-404.
80. Robson, S. L. & Wood, B. A. 2008 Hominin life history: reconstruction and evolution. J. Anat. 212, 394-425. (doi:10.1111/j.1469-7580.2008.00867.x) (Pubitemid 352024465)
81. Ruvolo, M. 1994 Molecular evolutionary processes and conflicting gene trees; the hominoid case. Am. J. Phys. Anthropol. 94, 89-113. (doi:10.1002/ajpa.1330940108)
82. Schultz, A. H. 1924 Growth studies on primates bearing upon man's evolution. Am. J. Phys. Anthropol. 7, 149-164. (doi:10.1002/ajpa.1330070218)
83. Schultz, A. H. 1935 Eruption and decay of the permanent teeth of primates. Am. J. Phys. Anthropol. 19, 480-581.
84. Schultz, A. H. 1937 Fetal growth and development of the rhesus monkey. Contrib. Embryol. Carneg. Inst. 26, 71-97.
85. Schultz, A. H. 1940 Growth and development of the chimpanzee. Contrib. Embryol. Carneg. Inst. 28, 1-63.
86. Schwartz, G. T. & Dean, M. C. 2001 Ontogeny of canine dimorphism in extant hominoids. Am. J. Phys. Anthropol. 115, 269-283. (doi:10.1002/ajpa.1081) (Pubitemid 32624672)
87. Schwartz, G. T., Reid, D. J. & Dean, M. C. 2001 Developmental aspects of sexual dimorphism in hominoid canines. Int. J. Primatol. 22, 837-860. (doi:10.1023/A:1012073601808) (Pubitemid 33072566)
88. Schwartz, G. T., Dean, M. C., Reid, D. J. & Zihlman, A. L. 2006 A faithful record of stressful life events preserved in the dental developmental record of a juvenile gorilla. Int. J. Primatol. 27, 1-19.
89. Shellis, R. P. 1984 Variations in growth of the enamel crown in human teeth and a possible relationship between growth and enamel structure. Archs. Oral Biol. 29, 697-705. (doi:10.1016/0003-9969 (84) 90175-4)
90. Shinoda, H. 1984 Faithful records of biological rhythms in dental hard tissues. Chem. Today 162, 34-40. [In Japanese.]
91. Skinner, M. F. & Hopwood, D. 2003 Hypothesis for the causes and periodicity of repetitive linear enamel hypoplasia in large, wild African (Pan troglodytes and Gorilla gorilla) and Asian (Pongo pygmaeus) apes. Am. J. Phys. Anthropol. 123, 216-235. (doi:10.1002/ajpa.10314)
92. Skinner, M. F. & Sperber, G. H. 1982 Atlas of radiographs of early man. New York, NY: A. R. Liss Inc.
93. Smith, B. H. 1989 Dental development as a measure of life history in primates. Evolution 43, 683-688. (doi:10.2307/2409073)
94. Smith, T. M. 2006 Experimental determination of the periodicity of incremental features in enamel. J. Anat. 208, 99-113. (doi:10.1111/j.1469-7580. 2006.00499.x)
95. Smith, T. M., Reid, D. J., Dean, M. C., Olejniczak, A. J. & Martin, L. B. 2006 Molar development in common chimpanzees (Pan troglodytes). J. Hum. Evol. 52, 201-206. (doi:10.1016/j.jhevol. 2006.09.004)
96. Smith, T. M., Smith, B. H. & Boesch, C. 2009 Dental development in the Täi forest chimpanzees reappraised. Am. J. Phys. Anthropol. 138, 243.
97. Smith, T. M., Smith, B. H., Reid, D. J., Siedel, H., Vigilant, L., Hublin, J.-J. & Boesch, C. 2010 Dental development of the Täi Forest chimpanzees revisited. J. Hum. Evol. 58, 363-373. (doi:10.1016/j.jhevol. 2010.02.008)
98. Suwa, G., Kono, R. T., Simpson, S. W., Asfaw, B., Lovejoy, O. C. & White, T. D. 2009a Paleobiological implications of the Ardipithecus ramidus dentition. Science 326, 94-99.
99. Suwa, G., Kono, R. T., Simpson, S. W., Asfaw, B., Lovejoy, O. C. & White, T. D. 2009b Author's summaries. Paleobiological implications of the Ardipithecus ramidus dentition. Science 326, 69. (doi:10.1126/science.1175824)
100. Swindler, D. R. 1985 Nonhuman primate dental development and its relation to human dental development. In Nonhuman primate models for human growth and development (ed. E. S. Watts), pp. 67-94. New York, NY: A. R. Liss.
101. Tarrant, L. H. & Swindler, D. R. 1972 The state of the deciduous dentition of a chimpanzee fetus (Pan troglodytes). J. Dent. Res. 51, 677.
102. Ward, C. V., Leakey, M. G. & Walker, A. 2001 Morphology of Australopithecus anamensis from Kanapoi and Allia Bay, Kenya. J. Hum. Evol. 41, 255-368. (doi:10.1006/jhev. 2001.0507)
103. Watts, D. P. 1991 Mountain gorilla reproduction and sexual behavior. Am. J. Primatol. 24, 211-226. (doi:10.1002/ajp. 1350240307)
104. White, T. D. 1977 New fossil homininds from Laetolil, Tanzania. Am. J. Phys. Anthropol. 48, 197-229.
105. Wich, S. A., Utami-Atmoko, S. S., Mitra Setia, T., Rijkesen, H. D., Schurmann, C., van Hooff, J. A. R. A. M. & van Schaik, C. P. 2004 Life history of wild Sumatran orangutans (Pongo abelii). J. Hum. Evol. 47, 385-398. (doi:10.1016/j.jhevol. 2004.08.006)
106. Winkler, L. A. 1996 A comparison of radiographic and anatomical evidence of tooth development in infant apes. Folia Primatol. 65, 1-13. (doi:10.1159/000156864)
107. Winkler, L. A., Schwartz, J. H. & Swindler, D. R. 1991 Aspects of dental development in the orangutan prior to eruption of the permanent dentition. Am. J. Phys. Anthropol. 86, 255-271. (doi:10.1002/ajpa. 1330860213)
108. Winkler, L. A., Schwartz, J. H. & Swindler, D. R. 1996 Development of the orang utan permanent dentition: Assessing patterns and variation in tooth development. Am. Phys. Anthropol. 99, 205-220. (doi:10.1002/(SICI) 1096-8644 (199601) 99:1, 205::AID-AJPA12.3.0. CO;2-R)
109. Zihlman, A., Bolter, D. & Boesch, C. 2004 Wild chimpanzee dentition and its implications for assessing life history in immature hominin fossils. Proc. Natl Acad. Sci. USA 101, 10541-10543. (doi:10.1073/pnas.0402635101) (Pubitemid 38955777)
110. Zihlman, A., Bolter, D. & Boesch, C. 2007 Skeletal and dental growth and development in chimpanzees of the Täi National Park, Côte D'Ivoire. J. Zool. 273, 63-73. (doi:10.1111/j.1469-7998.2007.00301.x) (Pubitemid 47300733)
111. Zuckerman, S. 1928 Age changes in the chimpanzee, with special reference to growth of the brain, eruption of the teeth and estimation of age; with a note on the Taungs ape. Proc. Zool. Soc. Lond. 96, 1-42.