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Closest Human Relatives - Hard

Choose the organism most closely related to humans based on current phylogenetic classification. Answers are increasingly more distantly related.
Source: onezoom.org
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mUMbah
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Last updated: February 23, 2026
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First submittedFebruary 23, 2026
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1. Our closest relative, diverging under 1 million years ago. Sometimes called a subspecies of Homo sapiens.
Neanderthals are so closely related that they interbred with other human species. Bonobos are apes, and the other two are early human species.
Homo erectus
Austrolopithecus
Neanderthal
Bonobo
2. Our closest nonhuman relative, diverging around 6 million years ago. We are both part of the Hominini tribe.
Chimps and bonobos are our closest animal relative, followed by gorillas. The other two are more distantly related monkeys.
Gorilla
Spider monkey
Chimpanzee
Macaque
3. Our fellow great apes, diverging around 14 million years. We are both part of the family Hominidae.
Orangutans are great apes, like gorillas, chimps, and bonobos. Baboons are monkeys, and the other two are more distantly related mammals.
Orangutan
Opossum
Baboon
Flying squirrel
4. Distantly related primates, diverging around 65 million years ago. We are both part of the order Primates.
Lemurs like King Julian are primates but not monkeys. Rabbits and chinchillas are related to primates, and kangaroos are marsupials.
Rabbit
Kangaroo
Chinchilla
Lemur
5. Our closer non-primate relatives, diverging around 75 million years ago. We are both part of the superorder Euarchontoglires.
Rodents like mice and rabbits diverged together with primates from most other mammals, including the other three here.
Dog
Mouse
Bat
Cow
6. More distantly related mammals, diverging around 90 million years ago. We are both part of the infraclass Placentalia.
Elephants diverged from other mammals earlier than most but not quite as early as monotremes like echidnas or marsupials like koalas and sugar gliders.
Echidna
Koala
Sugar glider
Elephant
7. The most distantly related mammals, diverging around 180 million years ago. We are both part of the class Mammalia.
Platypuses (Platypus? Platypi?), along with echidnas, are monotremes, the only mammals that lay eggs.
Crocodile
Whale shark
Eagle
Platypus
8. Our closer nonmammal relatives have similar embryo development to us, diverging around 320 million years ago. We are both part of the clade Amniota.
Birds and reptiles diverged together from mammals. Amphibians like frogs diverged just before.
Pigeon
Lungfish
Frog
Salamander
9. Our fellow vertebrates, diverging around 430 million years ago. We are both part of the phylum Chordata.
Stingrays are cartilaginous fish like sharks and are more distantly related to us than fish with true bones.
Octopus
Earthworm
Sea urchin
Stingray
10. Our most closely related animals outside of Chordata, diverging around 550 million years ago. We are both part of the superphylum Deuterostomia.
Surprisingly, starfish are somewhat closely related to vertebrates. We both have our anus form before our mouth as embryos.
Starfish
Jellyfish
Tardigrade
Ladybug
11. Bilaterally symmetrical animals, diverging around 560 million years ago. We are both part of the clade Bilateria.
Bilateral symmetry, a feature of most animals, developed after the radial symmetry of the other animals here.
Coral
Sea nettle
Comb jelly
Bumblebee
12. Some of the earliest animals, diverging around 650 million years ago. We are both part of the kingdom Animalia.
Sea sponges are likely the earliest forms of animals, although some evidence points to comb jellies diverging sooner.
Mold
Green algae
Diatom
Sea Sponge
13. Our closest relatives outside the animal kingdom, diverging around 1.35 billion years ago. We are both part of the clade Opisthokonta.
Mushrooms diverged from animals just after amoebae did and well later than the various algae and plants did.
Mushroom
Oak tree
Red algae
Brain-eating amoeba
14. Our distant eukaryote relatives, diverging around 2.15 billion years ago. We are both part of the domain Eukarya.
Eukaryotes like plants and animals come from an ancestral archaeon that evolved with a symbiotic bacterium inside of it, the only known example of this phenomenon.
Staph. bacteria
Tulip
E. coli
Coronavirus
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