Australopithecines and Homo Habilis Were Similar to Each Other in What Way?
Homo habilis
Nickname: Handy Man
Discovery Date: 1960
Where Lived: Eastern and Southern Africa
When Lived: ii.4 million to 1.4 million years ago
Acme: average 3 ft 4 in - four ft 5 in (100 - 135 cm)
Weight: boilerplate 70 lbs (32 kg)
Overview:
This species, 1 of the earliest members of the genus Homo, has a slightly larger braincase and smaller face and teeth than in Australopithecus or older hominin species. But it withal retains some ape-similar features, including long arms and a moderately-prognathic confront.
Its name, which means 'handy man', was given in 1964 because this species was thought to represent the get-go maker of rock tools. Currently, the oldest rock tools are dated slightly older than the oldest prove of the genus Homo.
History of Discovery:
A team led by scientists Louis and Mary Leakey uncovered the fossilized remains of a unique early human between 1960 and 1963 at Olduvai Gorge in Tanzania. The type speciman, OH 7, was institute by Jonathan Leakey, and then was nicknamed "Jonny's child". Considering this early human being had a combination of features dissimilar from those seen inAustralopithecus, Louis Leakey, South African scientist Philip Tobias, and British scientist John Napier declared these fossils a new species, and called themHomo habilis (significant 'handy homo'), considering they suspected that it was this slightly larger-brained early human that made the thousands of rock tools likewise plant at Olduvai Gorge.
How They Survived:
Early Homo had smaller teeth than Australopithecus, but their tooth enamel was nonetheless thick and their jaws were still strong, indicating their teeth were still adapted chewing some hard foods (maybe only seasonally when their preferred foods became less available). Dental microwear studies advise that the diet of H. habilisouthward was flexible and versatile and that they were capable of eating a broad range of foods, including some tougher foods like leaves, woody plants, and some animal tissues, but that they did not routinely swallow or specialize in eating difficult foods like brittle basics or seeds, stale meat, or very hard tubers.
Another line of evidence for the diet of H. habilis comes from some of the earliest cut- and percussion-marked basic, found back to 2.half-dozen 1000000 years ago. Scientists unremarkably associate these traces of butchery of big animals, directly show of meat and marrow eating, with the earliest advent of the genus Human being, includingH. habilis.
Many scientists recollect early on Homo, including H. habilis,made and used the kickoff stone tools constitute in the archaeological record—these as well date back to about 2.6 meg years agone; withal, this hypothesis is difficult to test because several other species of early homo lived at the aforementioned time, and in the same geographic surface area, equally where traces of the earliest tool use have been found.
Evolutionary Tree Information:
This species, along with H. rudolfensis, is i of the earliest members of the genus Man. Many scientists remember information technology is an ancestor of after species of Homo, mayhap on our own branch of the family unit tree. Naming this species required a redefining of the genus Homo (east.g., reducing the lower limit of brain size), sparking an enormous fence well-nigh the validity of this species.
While scientists used to think that H. habilis was the antecedent of Homo erectus, contempo discoveries in 2000 of a relatively late ane.44 million-year-old Homo habilis (KNM-ER 42703) and a relatively early 1.55 1000000-yr-old H. erectus (KNM-ER 42700) from the same area of northern Kenya (Ileret, Lake Turkana) challenged the conventional view that these species evolved one afterward the other. Instead, this show - along with other fossils - demonstrate that they co-existed in Eastern Africa for about half a meg years.
Questions:
We don't know everything about our early ancestors—simply we keep learning more! Paleoanthropologists are constantly in the field, excavating new areas, using groundbreaking engineering science, and continually filling in some of the gaps nearly our understanding of homo development.
Below are some of the still unanswered questions near Homo habilis that may be answered with future discoveries:
- Was H. habilis on the evolutionary lineage that evolved into afterward species of Homo and fifty-fifty perhaps our species, Human sapiens?
- Are H. habilis and Homo rudolfensis indeed different species, or are they part of a unmarried, variable species? Or was one the antecedent of the other?
- If H. habilis is non the ancestor of Homo erectus, how does it fit into our evolutionary tree?
- H. habilis is 1 of the earliest members of the genus Homo. Was there a relationship between the origin of this genus and climatic change – either with an increased period of climatic fluctuations, or major episodes of global cooling and drying leading to the spread of C4 grasslands?
References:
First paper:
Leakey, Fifty.S.B., Tobias, P.Five., Napier, J.R., 1964. A new species of the genus Human from Olduvai Gorge. Nature 202, 7-9.
Other recommended readings:
Bobe, R., Behrensmeyer, A.M., 2004. The expansion of grassland systems in Africa in relation to mammalian evolution and the origin of the genus Homo. Palaeogeography, Palaeoclimatology, Palaeoecology 207, 399-420.
Domínguez-Rodrigo, One thousand., Pickering, T.R., Semaw, Due south., Rogers, M.J., 2005. Cutmarked bones from Pliocene archaeological sites at Gona, Afar, Ethiopia: Implications for the functions of the world'due south oldest stone tools. Journal of Human Evolution 48, 109-121.
Haeusler, M., McHenry, H., 2004. Trunk proportions of Homo habilis reviewed. Journal of Human Evolution 46, 433-465.
Spoor, F., Leakey, G.G., Gathogo, P.N., Brown, F.H., Antón, Southward.C., McDougall, I., Kiarie, C. Manthi, F.K, Leakey, L.N., 2007. Implications of new early on Human being fossils from Ileret, east of Lake Turkana, Kenya. Nature 448, 688–691.
Ungar, P.S., Grine, F.Due east., Teaford, K.F., El-Zaatari, Due south., 2006. Dental microwear and diets of African early on Homo. Journal of Human Evoution 50, 78–95
Ungar, P.S., Grine, F.Eastward., Teaford, M.F., 2006. Diet in early Homo: a review of the evidence and a new model of adaptive versatility. Annual Review of Anthropology 35, 209-228.
Source: http://humanorigins.si.edu/evidence/human-fossils/species/homo-habilis
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