It would appear to me that Tarsiers have a slight chin: http://www.skullsunlimited.com/userfiles/image/variants_large_4225.jpg http://www.skullsunlimited.com/u

It would appear to me that Tarsiers have a slight chin: http://www.skullsunlimited.com/userfiles/image/variants_large_4225.jpg http://www.skullsunlimited.com/userfiles/image/variants_larg... It's true that it's part of a slope inwards towards the body, but in most pictures I could find it looks like it is definitely the same sort of phenomenon talked about in the article. At certain angles it's pretty remarkably a chin: https://boneclones.com/images/store-product/product-1169-main-original-1415041962.jpg https://boneclones.com/images/store-product/product-1169-mai... To my untrained eye, looking through mammal skulls the slope of the chin/not-chin area seems to have more to do with the angle of the teeth than anything. Actually, even other primates like this Siamang seem to have something pretty similar to human chins: http://www.store.dinosaurgeorge.com/images/Siamang%20Gibbon%20Skull.png http://www.store.dinosaurgeorge.com/images/Siamang%20Gibbon%...