Human evolution Flashcards
(43 cards)
Order of species (7)
Australopithecus afarensis, Australopithecus africanus, Paranthropus robustus, homo habilis, homo erectus, homo neanderthals, homo sapiens
Australopithecus afarensis
Present 4-3 million years ago, Longest-lived and best-known early human species, Found in Eastern Africa
Australopithecus afarensis adaptations
1-1.2 meters tall, Fully adapted to upright walking (bipedal), 25-30kg, Brain capacity of 400cc, Long, strong arms with curved fingers adapted for climbing trees, Small canine teeth like all other early humans, Body that stood on two legs and regularly walked upright, Apelike face proportions (flat nose, a projecting lower jaw) and a small brain (around 1/3 of a modern human brain
Australopithecus afarensis shelters
Lived/slept in trees and bushes, Nomadic with home bases
Australopithecus afarensis tools
Used materials at hand such as sticks and rocks, tools were unsophisticated with simple modifications, used found Oldowan tools
Australopithecus afarensis diet
Herbivores- feeding on seeds and grains, fruits, roots, tubers, All hominids had the same teeth arrangement of 2,1,2,3 so can’t be used to differentiate, Size of the teeth, especially molars, was used for grinding tubers
Australopithecus africanus
Present 3-2.5 million years ago, 1.3 meters tall, 30kg
Australopithecus africanus adaptations
Anatomically similar to A Afarensis with a combination of human-like and ape-like features, Rounder cranium housing a larger brain and smaller teeth, Long arms and large prognostic jaw, Pelvis, femur and foot bones indicate they walked bipedally but its shoulder and hand bones indicate they were also adapted for climbing, Less pronounced brow ridge, smaller canines and large molars
Australopithecus africanus shelter
Used nature around them for shelter such as trees, bushes and rocks, Nomadic with home bases
Australopithecus africanus diet
Similar diet to modern chimpanzees which consists of fruit, plants, nuts, seeds, roots, insects and eggs
Australopithecus africanus tools
Used found oldowan tools
Paranthropus robustus
Present 2-1.5 million years ago, 1.5 meters tall, 55kg
Paranthropus robustus adaptations
More massively built craniodentally and tended to contain gorilla-like sagittal crest on the cranium which anchored massive temporalis muscles of mastication, Brain capacity of 500-530cc, Sagittal chest, Massive lower jaw, Flatter face, Massive cheekbones (zygomatic arch)
Paranthropus robustus shelter
Used nature around them for shelter such as trees, bushes and rocks, Nomadic with home bases
Paranthropus robustus diet
Strong masticating features allowed individuals to crush and grind hard foods such as nuts, seeds, roots, and tubers in the back of the jaw, also ate fruit and insects
Paranthropus robustus tools
Used and possibly made a range of pebble tools (choppers, scrapers, flakes and chisels) called Oldowan tools
Homo habilis
Present 2.5-1.5 million years ago
Homo habilis adaptations
Bulge in speech producing part of the brain (Broca’s area) shows that rudimentary speech might have been used to work in teams
Homo habilis shelter
Usually on the move to find food meaning they didn’t stay in one place for very long, When they did need shelter, they used cliffs, hills and fallen trees, usually sticks being held up by rocks around the outside edges (wind brakes)
Homo habilis diet
Main diet was fruit, nuts, root eggs, small dead animals, bone marrow and fish, Scavenger/hunter- gatherer of plants, small dead animals and fish
Homo habilis tools
First to make tools (didn’t have any specific jobs, made for general tasks needed to sustain life)- Pebble tools (Oldowan tools)
Oldowan tools (pebble tools)
Crudely fashioned with few hammer blows/few flakes removed, Usually had a core with a cutting edge, Made from materials some distance away from the Homo Habilis home base suggesting they planned the manufacturing in advance, Used to exploit the environment, cut, chop and scrape plants and small animals
Homo erectus
Present 1.5 million-250,000 years ago
Homo erectus adaptations
Brain capacity of 850-1200cc, Oldest known early humans to have possessed moder human-like body proportions (relatively eleongated legs and shorter arms compared to the size of the torso), Had features considered adaptations to a life lived on the ground, indicating the loss of earlier tree-climbing adaptations, with the ability to walk and possibly run long distances, First hominin to have a straight shoulder line, First hominin who used bipedalism efficiently and didn’t climb and hang from branches, Has a shoulder with a wide range of motion meaning the hand could be positioned almost anywhwere around the body, Have forceful, accurate throwing that is powered not only by the shoulder muscles but by elestic energy stored in tendons and ligaments when the arm is drawn back ready to throw