What is the morphology of Homo erectus, brain size, body size, and cranial shape? Be specificHomo Erectus brain capacity averages about 950 cm3, which is larger than earlier hominids. Much of the fossil material found consists of cranial bones, jawbones, and teeth. The face is massively built, preserved in just a few specimens, and its lower sections project forward. The bone-forming nose wall is narrower and narrower than in previous Homo or Australopithecus, and the nasal surface is comparatively high and conspicuous. There is a flattened forehead, and from left to right, the part of the cranium directly behind the brow ridge is constrained greatly. From the frontal bone, a low slope or peak of bone runs along the centerline of some skulls, and the ear area appears to have highly defined crests. There is another ridge running through the broad-based skull.
The difference between the Homo sapiens and Australopithecus is that the region where the neck connects muscles are much larger than in Homo sapiens or habilis. Other distinguishing characteristics of H. On the underneath of the skull, Erectus can be found, especially at the jaw’s joint. The lower jaw itself is deep and resilient and lacks the growth of the chin. The teeth are bigger in total than the teeth of Homo sapiens.
- Which specimen is the most well know example of Homo erectus, and where is he from? Describe him.
Research shows that the most common Homo erectus is known as Turkana Boy, who originated from Africa. This elderly male belonged to a Homo erectus population that stretched to the Caucasus Mountains in Western Asia from Africa. The pelvis is narrower than that of Homo sapiens, most likely to be more effective for upright walking. Body hair is also have been thinner to hasten cooling and probably with enhanced sweat glands. The arms and legs are slightly longer, indicating productive dependability and also indicates he lived in a hat and arid climate.
- Are Homo erectus only found in Africa? If not, where else are they found, and are they different or the same in physical characteristics?
It is commonly thought that this early species of explorers began their marathon out of Africa, through the Middle East, the Caucasus, and eventually around East Asia, reaching Indonesia and China.
The only difference between the Homo erectus found in Africa found in other regions is the hair. The African Homo erectus had much hair to decapitate heat due to the cold climate in Africa. However, there are several similarities in both of them, which include; smaller, more primitive teeth, broader and larger hips, a smaller overall body and thinner skulls than later specimens, and there was a prominent brow ridge over the eyes and nose.
- Some paleoanthropologists differentiate between African Homo ergaster and Asian Homo erectus. Why? What are their physical differences, and what accounts for these differences? How would a lumper classify African and Asian specimens, and why? How would a splitter view these differences? Does your textbook classify Asian and African specimens as the same species of different species?
Some of the early transitional human beings in Africa have transformed into a modern, entirely human race. Many researchers refer to them as Homo erectus. A few of them, however, divide them into two species—Homo ergaster and Homo erectus. The ergaster fossils were probably much earlier and were found in Africa for the most part, while Erectus was found in Asia.
Homo ergaster had a greater body mass, longer legs, compulsory bipedalism, relatively short jaws, and teeth were characteristics that suggest a substantial shift in the diet and body features and perceived lifestyles that are more related to current humans than to previous and contemporary primates. A lumper would name these two species like Homo erectus, while a splitter would split the two based on the difference in their physical appearance. The textbook classifies the two in the same category, which is the Homo erectus.
- Where is the site of Were it the site of Dmanisi? What is significant about this site? What does it tell us about the development of Homo erectus when it first left Africa??
Dmanisi is an archaeological site in the Kvemo Kartli region of Georgia in the river valley of Mashavera, where a series of fossils were discovered about 1.8 million years ago. Dmanisi is one of the oldest known habitation sites anywhere in Eurasia, equivalent to the H. Erectus habitat in eastern Africa, which makes it important to study human evolution.
Homo ergaster is the first human species to leave Africa, heading eastwards, where they established a habitat at Dmanisi. Research has led the Dmanisi scientists to recognize the high probability that in Africa, some more basic types of human evolved, came to Eurasia, and transformed into Homo erectus. No human fossils were found, but the tools found in Dmanisi shows that they were of Homo erectus.
- Compare the physical differences between the cranium and brain size of Homo erectus and modern Homo sapiens. If you look at the back of the textbook, there are guides on skeletal morphology.
Studies have shown that humans have a relationship to great apes that has been confirmed by genetic information before early humans. There is a misconception that since they were not as advanced, Homo Neanderthal had a smaller brain than modern humans. Yet their brains were just as big and even larger as ours, relative to their brawnier body.
The research suggests that vision and movement were given to greater areas of the Neanderthal brain relative to the modern human brain, leaving less space for the higher level of the thought needed to shape large social groups.
Researchers can compare how much of the brain has been left over for other mental performance if the body and visual system size variations are recognized. Research indicates that modern humans living at higher latitudes have built wider areas of vision in the brain to deal with low levels of light. This indicates that since they evolved in Europe, Neanderthals possibly had larger eyes than modern humans, whereas contemporary humans only recently emerged from lower latitudes.
- Are Homo erectus more similar to us than previous hominins? In what ways?
Homo erectus is more similar to humans, for they walked on four limbs rather than previous hominins that walked on four. Human beings typically undergo a marked rise in growth comparable to Homo erectus during early adolescence. It is important to note that differences in size are characteristic of Homo erectus, which is more human than earlier hominins.
- Do you see any trend in cranial capacity from previous hominins to more recent hominins? What is it?
There is a trend in cranial capacity from previous hominins. The brain capacity has continued to grow notable from the Homo habilis. There is also a trend in the tools used by early humans. There are demonstration signs of development over time, eventually leading to stylish, symmetrical tools that required considerable ability to create.
- What kind of tool technology did Homo erectus use? How is it different from Oldowan technology? Describe this new technology.
In Ethiopia, the discovery of skull fragments alongside various forms of stone tools sheds more light on the ancient hominin Homo erectus’ lifestyle. When these advanced implements had been developed, it was thought that H. Erectus stopped using more basic Oldowan instruments, which are sharp-edged stone flakes.
The tools used by Homo erectus were reusable, portable tools designed to be taken from place to place instead of being made every time they were required. They had increased percussion brushing to relatively standardized forms.
- Is it known if Homo erectus used fire?
Several archaeological sites in East Africa, such as Chesowanja near Lake Baringo, Koobi Fora, and Olorgesailie in Kenya, are the earliest evidence humans use fire. There are archaeological sites at Koobi Fora with indications of Homo erectus’ regulation of fire, with the reddening of sediments that can only come from heating. At a site in Olorgesailie, Kenya, there is a heart-like depression. There was some very tiny charcoal, but it may have come from a spontaneous brush fire. Homo erectus consumed meat, which required fire, as can be seen from charred and blackened mammal bones, which is evident that Homo erectus used fire.