FINAL TEST Flashcards
HOMINID EVOULTION
- OVER 6MYA first hominids appeared
* about 2.5 mya human line spilt
ROBUST AUSTRALOPITHECIES
*One line developed big molar/pre molar teeth for chewing became extinct about 1 mya These are Robust australopithecines
GRACILE AUSTRALOPIHECINES
The other line developed larger brain, smaller teeth, smaller faces
started using stone tools
Anatomically modern humans (Homosapiens) are about 160kya
Hominid lie spilt from ape line 5-7 mya
sahelanthropus tehadenisis at 6-7 may
ardipithecus ramidus/kadabba at 5.8-5.2 mya
Orrin Hugeness at 6mya
First Australopithecus appears at 4.2mya
-3. 2.5 may two lies of hominids evolved
Robust Austrlopot(paranthropus) with larger bad teeth, and huge powerful jaws
-Gracile Austlop have smaller back teethed jaws
applies to the boy in their heads.(skul) for robust and gracile
-2.5 myz first evidence of genus Homo
HOMO HABILIS
Brian is 1/2 of modern humans.
stone tools for scavenging animals flesh
BIRTHPLACE TO MODERN HOMINIDS
AFRICA
5 LOCATION OF MAJOR HOMINID SITES
- CHAD
- ETHIOPIA
- KENYA
- TARZANIA
- SOUTH AFRICA
GREAT RIFT VALLEY
plate techtonics
EARLY SPECIES
7 EARLY HOMINID SPECIES EXISTED PRIOR 3 MYA
1) SAHELANTHROPUS TCHADENISIS( (6-7 MYA)
2) ORRORIN TUGENESIS ( 6 MYA)
3) ARDIPITHECUS RAMIDUS (5.8-52 MYA)
4) ARDIPITHECUS KADABBBA ( 5.6-5.8 MYA)
5) AUSTRALOPITHECUS ANAMENSIS ( 4.2-3.8 MYA)
6) AUSTRALOPITHECUS AFARENSIS (4-3 MYA)
7) KENYAPITHECUS PLATYOPS (3.5-3.2 MYA)
1) SAHELANTHROPUS TCHADENISIS (6-7mya)
- (only cranial remains) there is a debate to whether it really was bipedal
- very small cranium (320-380 cc) seem size as a chimp
2) ORRORIN TUGENEISIS (6 mya)
- found in 6 mya sediment
* Femur suggested Bipedal, but arms and bones suggest lived in tress
The Savannah hypothesis
Historically it was believed that bipedalism evolved on the open Savannah. however modernly we know that isn’t true (the savannah hypothesis) it is now understood that bipedalism evolved in thickly wooded forest
4) ARDIPITHECUS KADABBA
Based on teeth found 2001/2002 int the Middle Awash, Ethiopia Date to 5.6-5.8 mya
5) AUSTRALOPITHECUS ANAMNESE
(4.3-8mya)
bipedalism
Ancestral apelike characteristics
again ancestral (ape like) and derived (bipedalism) features are mixed, showing that all these features did not arise at the same time. (Mosaic Evolution)
A. Anamensis may be a direct line to later hominids
6) AUSTRALOPITHECUS AFARENSIS
LUCY was one
pelvic bones ad femur clearly indicated bipedalism
bipedalism =hominid
laetoil footprints: these footprints from 3.75 mya shows characteristics associated with bipedalism
Diastema : a gap between the teeth (between incisors and canines for primates)
has Prognathism: the projection/protrusion of the lower face
7) KENYATHROPUS PLAYTOPS(3.5-3.2 mya)
means “flat face man from kenya”
MARY LEAKEY:
illustrator that got famous for discovering Robust
DONALD JOHANSON:
discoverd Lucy