Pre-Modern Homo Created and presented by: Mark O'Connell, ChaunCarroll, Alycia Vasquez, Ava Rivera, and Jessica Kress
Homo habilis “The Handy Man” Dating back to between 2.5 to 1.8 million years ago. Fossil remains were first found in Olduvai Gorge, Tanzania in the 1960’s, by Luis Leakey, Philip Tobias, and John Napier. Stood about 3 and a half feet tall, had long arms when compared to its legs. It gained its place in the genus Homo because of its skull. Large quantity of stone tools, like the Oldawan chopper or hand-axe found around H. Habilissites.
Homo rudolfensis This species was discovered in the upper Burgi Member of the KoobiFora Formation in east Lake Turkana, Kenya, just south of the border between Kenya and Ethiopia . These fossil remains can confidently be dated to be between 1.88 and 1.9 million years old. The braincase which was measured at 775 cc. this is over a 100 cc larger than the average size of Homo habilis. The lumpers only recognize three species in the genus Homo: Homo habilis, Homo erectus, and Homo sapiens. The splitters, on the other hand, recognize nine species in the same genus, one of these being Homo rudolfensis.
Homo ergaster “Workman” KNM-ER 992 KNM-WT 15000 ! Lived in Kenya, from 1.49 to 1.9 million years ago Face tucked under the brain case, foreman magnum that is displaced forward, eyes set wide apart with a bar that spans over them, top of face is nearly vertical, upper jaw juts forward, roots of upper front teeth are vertically set, mouth is widely separated from nose opening, cheeks are slender. First hominem with a body size and shape that is more like that of modern humans.
Homo erectus “Java man” Homo erectus was capable of communicating, their tools became thicker and spears were lighter and more sophisticated. * Eugene Dubois discovered the remains in Java, Indonesia. Dating back between 1.25 mya to 700 thousand years ago. The Sangiran skull has the most complete findings with the face vertically set, the upper jaw barely jutting out, and teeth set vertically. Due to a sense of autonomy, H. Erectus migrated for food and did not have to depend on the environment.
Pre-Modern Homo Skulls a c d b Homo habilis: “This cranium, 'KNM-ER 1813,' was discovered in Kenya and dates to 1.9 mya.” Homo rudolfensis: “KNM ER 1470, discovered in KoobiFora (Kenya) by Bernard Ngeneo.” Homo ergaster: “Confirmed the co-existence of Homo and Australopithecines in Eastern Africa. Considered a female. KoobiFora, Kenya 1975.” Homo Erectus: “One of the more complete crania (D-2282), shown here, was discovered in 1999 and enabled researchers to classify the hominid as Homo erectus.”
Fossil Sites Homo ergaster Homo habilis Homo erectus Homo rudolfensis Olduval Gorge, Tanzania Lake Turkana, Kenya Upper Burgi, KBS, and Okote Members, Kenya Sangiran, Trinil, Mgawi, Java, Indonesia
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