Canine sexual dimorphism in Ardipithecus ramidus was nearly human-like
- BiologyProceedings of the National Academy of Sciences
The analysis of >300 fossils spanning 6 million years shows that male canine size reduction occurred early in human evolution, broadly coincident with the adoption of bipedality, and suggests a profound and evolutionarily deep sociobehavioral shift that minimized male–male aggression.
Craniodental Sexual Dimorphism Among Hylobatids
- BiologyInternational Journal of Primatology
The finding of male-biased sexual dimorphism in only some hylobatid taxa suggests that although male craniofacial morphology of some gibbon and siamang species may be associated with sex-specific agonistic interactions, this effect is not ubiquitous among hylOBatids.
Fighting for what it’s worth: participation and outcome of inter-group encounters in a pair-living primate, the Javan gibbon (Hylobates moloch)
- PsychologyBehavioral Ecology and Sociobiology
The results highlight that mate and infant defense are crucial for male Javan gibbons, especially in view of their pair-living system, long interbirth intervals, and slow infant development and suggest thatJavan gibbon females may advertise their reproductive status through singing during inter-group encounters while Javan Gibbon males rather participate to defend their mates and infants.
Intrasexually selected weapons
- Environmental Science, BiologyBiological reviews of the Cambridge Philosophical Society
It is conceptualized that there are five ways in which a sexually dimorphic trait, apart from the primary sex traits, can be fixed: sexual selection, fecundity selection, parental role division, differential niche occupation between the sexes, and interference competition.
Deciduous canine morphology in recent Japanese
The deciduous canines were generally quite similar in morphology and size between male and female, and the sexual dimorphism was significant for only the mesiodistal and labiolingual crown diameters of the upper deciduously canines.
Supplementary Online Information
Supplementary Table 1 The Shapiro-Senapathy matrix scores of authentic, mutated and cryptic/de novo 3' splice sites in exons Supplementary Table 2 The Shapiro-Senapathy matrix scores of authentic,…
The Fossil Record and Evolutionary History of Hylobatids
- Geography, Environmental Science
The fossil record documenting the evolution of hylobatids is extremely poor, so details of their phylogenetic and geographic origins and subsequent evolutionary history are obscure. Based on…
An analysis of canine size and jaw shape in some Old and New World non-human primates
In females, the angle the jaw must be opened to clear the canine teeth was in most cases very small though in certain species elongated canines were found.
Dental and cranial variation in living Indriidae
It is concluded that none of the four species of Indriidae is sexually dimorphic, and this lack of dental and cranial dimorphism is unusual in primates, and probably reflects the relatively limited aggressive behavior and the lack of male dominance in Indriaceae.
SHOWING 1-9 OF 9 REFERENCES
Book Reviews: The Aleut Dentition. A Correlative Study of Dental Characteristics in an Eskimoid People
The Aleut Dentition
The relation in size between premaxilla, diastema and canine.
- BiologyAmerican journal of physical anthropology
Age changes and variability in gibbons. A Morphological study on a population sample of a man‐like ape
A field study in Siam of the behavior and social relations of the gibbon (Hylobates lar)