Distinctive traits of the robust australopithecines include: small front teeth and large back teeth. a big face and a sagittal crest.

How did robust australopithecines differ from earlier australopithecines?

How did robust australopithecines differ from earlier australopithecines? Robust australopithecines had smaller front teeth. How do humans differ from apes? Humans use spoken language.

Which dental traits characterize the hyper robust australopithecines?

Which dental traits characterize the hyper-robust australopithecines? Correct Answer(s) : large molars – Large molars were part of the enhanced chewing apparatus of these robust species. large lower jaw – The enlarged lower jaw was part of the enhanced chewing apparatus of the robust australopithecines.

Which of the following is a robust australopithecine species?

Paranthropus robustus is an example of a robust australopithecine; they had very large megadont cheek teeth with thick enamel and focused their chewing in the back of the jaw. Large zygomatic arches (cheek bones) allowed the passage of large chewing muscles to the jaw and gave P.

What is the best known australopithecine?

Australopithecus afarensis is the most well known species, partly because of the famous “Lucy” skeleton (A.L. 288-1), and partly because it is known from most skeletal elements from male and female, young and old individuals. Much of our understanding of hominin origins is based on A.

What are the major difference between gracile and robust australopithecines?

The main difference between gracile and robust is that gracile species had smaller cheek teeth, pronounced prognathism, less flared cheeks, and no sagittal crest, but robust species had enormous cheek teeth, robust jaws and massive jaw muscles, sometimes anchored to a bony crest running along the top of the skull.

Which of the following traits characterize robust Paranthropus species?

Paranthropus is characterised by robust skulls, with a prominent gorilla-like sagittal crest along the midline—which suggest strong chewing muscles—and broad, herbivorous teeth used for grinding.

Which of the following differentiates Paranthropus from Australopithecus?

The main difference between Paranthropus and Australopithecus is that Paranthropus is more robust whereas Australopithecus is more gracile. … In addition, Paranthropus has larger teeth known as molars and larger jaw while Australopithecus has smaller teeth and a smaller jaw.

What characteristic or characteristics of Australopithecus teeth made them ideal for crushing food?

Instead, the australopithecines would have easily been able to break down hard, brittle foods. Their large flat molars would have served well for crushing, and their thick enamel would have withstood abrasion and fracture.

Which of the following traits could be used to determine whether an ape is also a hominin?

Some characteristics that have distinguished hominins from other primates, living and extinct, are their erect posture, bipedal locomotion, larger brains, and behavioral characteristics such as specialized tool use and, in some cases, communication through language.

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Which of the following characteristics are associated with Australopithecus afarensis?

afarensis had both ape and human characteristics: members of this species had apelike face proportions (a flat nose, a strongly projecting lower jaw) and braincase (with a small brain, usually less than 500 cubic centimeters — about 1/3 the size of a modern human brain), and long, strong arms with curved fingers …

How many species of robust Australopithecus have been identified?

Ever since Broom’s 1949 announcement of a new type of hominin from Swartkrans, paleoanthropologists have been debating the taxonomy and phylogeny of the “robust” australopiths 9,10,22,42-47 (Fig. 3). Placing the three commonly recognized species (P. robustus, P.

What did the robust australopithecines Paranthropus robustus and Paranthropus boisei eat?

The East African hominin Paranthropus boisei possessed large and low-cusped postcanine dentition, large and thick mandibular corpora, and powerful muscles of mastication, which are generally believed to be adaptations for a diet of nuts, seeds, and hard fruit (1–3).

What is the characteristics of Australopithecus?

Australopithecines (plural of Australopithecus) were short and stocky with apelike features such as long arms, thick waistlines and chimpanzee-like faces. They had short and stocky apelike bodies, and brains closer in size to a chimpanzee than a modern human. Males were about 1.37 meters tall and females 1.14 meters.

What are the characteristics of Australopithecus africanus?

africanus had a rounder cranium housing a larger brain and smaller teeth, but it also had some ape-like features including relatively long arms and a strongly sloping face that juts out from underneath the braincase with a pronounced jaw. Like Au. afarensis, the pelvis, femur (upper leg), and foot bones of Au.

What features do the Australopithecus species share?

They were similar to modern humans in that they were bipedal (that is, they walked on two legs), but, like apes, they had small brains. Their canine teeth were smaller than those found in apes, and their cheek teeth were larger than those of modern humans.

Is Australopithecus boisei robust?

Robust australopithecines are characterised by heavily built skulls capable of producing high stresses and bite forces, and some of the largest molars with the thickest enamel of any known ape. P. boisei is the most robust of this group.

Is Australopithecus africanus gracile or robust?

Australopithecus afarensis and africanus, and the other species above, are known as gracile australopithecines, because of their relatively lighter build, especially in the skull and teeth. (Gracile means “slender”, and in paleoanthropology is used as an antonym to “robust”.)

What are gracile features?

GRACILE stands for the condition’s characteristic features: growth retardation, aminoaciduria, cholestasis, iron overload, lactic acidosis, and early death.

What are three species of Australopithecus that are considered gracile?

Traditionally, graciles include the ≥2 million year old Australopithecus afarensis and africanus, and robusts include the later A. boisei and robustus. The discovery of an A. aethiopicus cranium (Walker et al.

What are gracile australopithecines?

The gracile australopithecines (members of the genus Australopithecus) (Latin australis “of the south”, Greek pithekos “ape”) are a group of extinct hominids that are closely related to humans.

Which of the following traits are present in all primates?

Characteristics of all primates include four limbs, collarbones, a high degree of mobility in their shoulders, forward facing eyes, relatively dexterous hands, and a high degree of intelligence.

Which statement best describes the general shape of the pelvis and spine of Australopithecus?

Which statement best describes the general shape of the pelvis and spine of Australopithecus? The australopith pelvis is shorter and bowl shaped, and the spine is curved, similar to that of humans.

Which of the following hominin traits is key to differentiating early hominins from the apes?

Bipedalism, considered a key defining characteristic that differentiated early hominins from other apes, perhaps developed in the woodlands but became even more adaptive in a savanna habitat.

What are two traits that anthropologists use to determine if fossilized remains belonged to a bipedal organism?

Major morphological features diagnostic (i.e., informative) of bipedalism include: the presence of a bicondylar angle, or valgus knee; a more inferiorly placed foramen magnum; the presence of a reduced or nonopposable big toe; a higher arch on the foot; a more posterior orientation of the anterior portion of the iliac …

Which statement best describes the fossils belonging to the genus Ardipithecus and how they relate to the genus Australopithecus?

Which statement best describes the fossils belonging to the genus Ardipithecus and how they relate to the genus Australopithecus? There are more than 100 fossil specimens enabling scientists to suggest that Ardipithecus was a plausible ancestor of Australopithecus.

What are the defining traits of anthropoids?

belonging or pertaining to the group of primates characterized by a relatively flat face, dry nose, small immobile ears, and forward-facing eyes, comprising New World monkeys, Old World monkeys, and apes, including humans: these primates were formerly classified into their own suborder, Anthropoidea, which has been …

Which cranial traits do you think are more derived in Australopithecus afarensis compared to the earlier Ardipithecus ramidus species?

Which cranial traits do you think are more derived in Australopithecus afarensis compared to the earlier Ardipithecus ramidus species? The increase in brain size is the most prominent cranial change. Australopithecus afarensis is a gracile australopithecine.

Which statement most accurately describes the teeth of Australopithecus afarensis?

Which statement most accurately describes the teeth of Australopithecus afarensis? Au. afarensis had pointed premolars that are somewhat similar to an ape’s. significant time spent in trees.

Which of the following is a derived trait of Sahelanthropus tchadensis?

Which of the following is a derived trait of Sahelanthropus tchadensis? choppers, cobbles, flakes, and bone tools. What is the earliest date associated with Homo erectus fossils in Asia?

How did robust australopithecines differ from earlier australopithecines?

How did robust australopithecines differ from earlier australopithecines? Robust australopithecines had smaller front teeth. How do humans differ from apes? Humans use spoken language.