12 May 2026 2:19 pm
I asked why Obongo had funny ears and got this for an explanation:
Yes, spider monkeys, along with other small-bodied primates like gibbons, have narrow birth canals relative to the size of the fetus. This anatomical constraint creates a "tight fit" during parturition because the fetal cranium is quite broad compared to the maternal pelvic opening.
Yes, spider monkeys, along with other small-bodied primates like gibbons, have narrow birth canals relative to the size of the fetus. This anatomical constraint creates a "tight fit" during parturition because the fetal cranium is quite broad compared to the maternal pelvic opening.