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The Pendulous Pseudo-Penis
Female spider monkeys have such large, pendulous clitorises that early researchers thought all spider monkeys were male.
Spider Monkey
Ateles
These acrobatic primates have an unusual anatomical feature — females have enlarged clitorises that resemble penises.
Vital Stats
🏷️ TypeNew World monkey (primate)
🌍 Found InCentral and South America — tropical rainforests
📏 Size35-66cm body, 6-9kg
⏳ Lifespan25-40 years
🔞 Sexual MaturityMales: 5 years | Females: 4-5 years
💕 Mating SystemPromiscuous — fission-fusion social groups
📅 Mating SeasonYear-round
🤰 Gestation226-232 days
👶 Offspring1 infant every 2-4 years
🍆 Penis Size8 cm
⏱️ Sex Duration1 minute
🔬 Notable AnatomyFemales have pendulous, erectile clitorises historically mistaken for penises; used for scent marking
⚖️ Sexual DimorphismSimilar size; female clitoris resembles male penis