PMID- 32510604
OWN - NLM
STAT- MEDLINE
DCOM- 20210211
LR  - 20210211
IS  - 1096-8644 (Electronic)
IS  - 0002-9483 (Linking)
VI  - 172
IP  - 4
DP  - 2020 Aug
TI  - Odontochronologies in male and female mandrills (Mandrillus sphinx) and the 
      development of dental sexual dimorphism.
PG  - 528-544
LID - 10.1002/ajpa.24094 [doi]
AB  - OBJECTIVES: We examine how dental sexual dimorphism develops in mandrills, an 
      extremely sexually dimorphic primate. We aimed to (a) establish the chronology of 
      dental development (odontochronology) in male and female mandrills, (b) 
      understand interindividual and intersex variation in odontochronologies, and (c) 
      determine how dental sexual dimorphism is achieved. MATERIALS AND METHODS: We 
      prepared histological ground sections from the permanent teeth of four female and 
      four male mandrills from the semi-free ranging colony at the Centre International 
      de Recherches Medicales, Franceville, Gabon. We used the microscopic growth 
      increments in the sections to create odontochronologies. We compared ages at 
      crown initiation, crown formation times (CFT) and crown extension rates (CER) 
      between individuals and sexes to assess interindividual and intersex variation. 
      RESULTS: All mandrill teeth are sexually dimorphic in size. Dental sexual 
      dimorphism in mandrills is achieved via sex differences in the duration of growth 
      (bimaturism) and in growth rates. We also found interindividual and intersex 
      variation in the ages at initiation and completion of crown formation. 
      DISCUSSION: Our results show that the rate of ameloblast differentiation varies 
      between individuals and that selection for both the age at tooth initiation and 
      CER has occurred independently in males and females to ensure that the teeth 
      develop at appropriate times relative to the growth of the sexually dimorphic 
      jaws. They also show that canine dimorphism is achieved through differences in 
      both CER and CFT, unlike extant great apes or Cantius. Given at least three 
      mechanisms for achieving canine dimorphism, we need more information to trace the 
      evolution of this trait in primates.
CI  - (c) 2020 The Authors. American Journal of Physical Anthropology published by Wiley 
      Periodicals LLC.
FAU - Dirks, Wendy
AU  - Dirks W
AUID- ORCID: 0000-0001-9414-0626
AD  - Department of Anthropology, Durham University, Durham, UK.
FAU - Lemmers, Simone A M
AU  - Lemmers SAM
AUID- ORCID: 0000-0002-7128-8342
AD  - Department of Anthropology, Durham University, Durham, UK.
AD  - Science and Technology in Archaeology Research Center, The Cyprus Institute, 
      Nicosia, Cyprus.
FAU - Ngoubangoye, Barthelemy
AU  - Ngoubangoye B
AD  - Centre de Primatologie, Centre Internationale de Recherches Medicales, 
      Franceville, Gabon.
FAU - Herbert, Anais
AU  - Herbert A
AD  - Centre de Primatologie, Centre Internationale de Recherches Medicales, 
      Franceville, Gabon.
FAU - Setchell, Joanna M
AU  - Setchell JM
AUID- ORCID: 0000-0002-5782-1235
AD  - Department of Anthropology, Durham University, Durham, UK.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200608
PL  - United States
TA  - Am J Phys Anthropol
JT  - American journal of physical anthropology
JID - 0400654
SB  - IM
MH  - Animals
MH  - Craniology
MH  - Dentition, Permanent
MH  - Female
MH  - Male
MH  - Mandrillus/*anatomy & histology/*growth & development
MH  - Odontometry
MH  - *Sex Characteristics
MH  - Skull/anatomy & histology
MH  - Tooth/*anatomy & histology
OTO - NOTNLM
OT  - bimaturism
OT  - dental histology
OT  - extension rate
OT  - odontochronology
OT  - sexual dimorphism
EDAT- 2020/06/09 06:00
MHDA- 2021/02/12 06:00
CRDT- 2020/06/09 06:00
PHST- 2019/10/14 00:00 [received]
PHST- 2020/02/18 00:00 [revised]
PHST- 2020/05/15 00:00 [accepted]
PHST- 2020/06/09 06:00 [pubmed]
PHST- 2021/02/12 06:00 [medline]
PHST- 2020/06/09 06:00 [entrez]
AID - 10.1002/ajpa.24094 [doi]
PST - ppublish
SO  - Am J Phys Anthropol. 2020 Aug;172(4):528-544. doi: 10.1002/ajpa.24094. Epub 2020 
      Jun 8.