Taxonomy and Evolution
Neoanthropines are representatives of the species Homo sapiens. Fossil humans of the modern type are traditionally called Cro-Magnons — this term comes from the name of the French Abri de Cro-Magnon cave, which is a famous Upper Paleolithic site.
The emergence of Cro-Magnons, who possessed a huge distribution range, became the final point in human species evolution. From this moment on, the physical appearance of humans did not change radically, and the main changes affected the social and technological spheres.
Morphological Features
The anatomical structure of neoanthropines practically does not differ from that of modern humans. The physical type of fossil humans fully corresponds to ours, although the bones of Cro-Magnons were somewhat more massive. Height reached 180 cm.
The most significant changes affected the structure of the skull and face:
- The facial part began to protrude forward less, and the overall dimensions of the skull decreased compared to ancestors.
- A high straight forehead and a high convex crown formed.
- The occiput acquired a characteristic rounded shape.
- The eye sockets became smaller and acquired a quadrilateral shape.
- The continuous supraorbital ridge completely disappeared.
- A pronounced mental eminence (chin) appeared, which is a crucial sign of the development of articulate speech.
The maxillofacial apparatus became weaker, and the teeth acquired a small pulp cavity. The brain volume in fossil forms was 1000–1600 cm³, while in modern humans it varies within 1000–1800 cm³.
Tools and Food Procurement
Cro-Magnons made a huge leap in material processing technologies. They began to create complex composite tools, using not only stone but also bone. Bone tools turned out to be significantly stronger and more durable than stone ones. Knives, sewing needles, spearheads, and harpoons appeared in everyday life.
The basis of subsistence was hunting and fishing. Bone harpoons were actively used for efficient fishing. Hunting became mass-scale: thanks to excellent terrain knowledge, neoanthropines could harvest animals by the thousands. Subsequently, modern man stepped even further, moving from simple hand tools to the creation of the most complex mechanisms.
Demographics, Dwellings, and Lifestyle
Despite developed survival skills, the average lifespan of fossil neoanthropines ranged from 30 to 50 years (this indicator remained at this level until the Middle Ages).
The availability of warm clothing allowed Cro-Magnons to endure harsh climatic conditions and master hard-to-reach areas. Depending on lifestyle and climate, types of dwellings also varied:
- Caves were used for seasonal or year-round habitation.
- Capital structures were erected in river valleys — they had stone walls and a roof covered with animal hides.
- Lightweight huts were built by nomadic groups of hunters for temporary campsites.
Briefly: answers to topical questions
What anatomical structures of the larynx and hyoid bone ensured the development of articulate speech in neoanthropines?
The development of the speech function in neoanthropines was ensured by the development of the cartilage and ligaments of the larynx. An important bony sign of speech development is the formed mental eminence of the mandible.
The provided sources do not describe the direct role of hyoid bone structures in speech development, but it is indicated that the geniohyoid muscle (m. geniohyoideus), which pulls the hyoid bone forward and upward, attaches to the mental spine.
What are the structural features of the postcranial skeleton of Cro-Magnons compared to modern humans?
The postcranial skeleton of Cro-Magnons in trunk structure practically does not differ from the modern type, but their bones are more massive.
What changes in the endocast of neoanthropines are associated with the development of specific lobes of the brain?
The development of the brain in neoanthropines is accompanied by an increase in its volume to 1000–1600 cm³, as well as the formation of a high straight forehead and a convex crown. Progress is associated with significant development of the following structures:
- Frontal and parietal lobes — development of "intellectual" zones.
- Neocortex (neocortex) — general development of the cerebral cortex.
- Speech centers (Broca's and Wernicke's) — provision of speech function.
The term "endocast" is not mentioned in the sources, but the corresponding changes in the shape of the braincase are described.
To memorize the differences of the neoanthropine skull, use the rule "CHEF": Chin (present), Head/Forehead (high straight), Enlarged (volume), Frontal/Crown (convex). At the same time, there is no supraorbital ridge!
Class and exam questions
Why are fossil neoanthropines called Cro-Magnons?
The name "Cro-Magnon" originated from the Abri de Cro-Magnon cave in France. This is a famous Upper Paleolithic archaeological site where the remains of these ancient humans were discovered.
What brain volume is typical for neoanthropines?
In fossil neoanthropines, the brain volume ranged from 1000 to 1600 cm³. In modern representatives of the species Homo sapiens, this indicator can reach 1800 cm³.
What causes the appearance of the mental eminence?
The formation of the mental eminence on the mandible is an anatomical feature that is directly associated with the development of fully articulate speech in neoanthropines.
Why did neoanthropines begin to use bone for tools more often?
Bone turned out to be a much stronger and more durable material compared to stone. Complex composite tools were made from it, such as needles for sewing clothes and harpoons for catching fish.
What else to study on this topic
- Detailed structure of the skull and dentition of Homo sapiens
- Comparison of tools of Cro-Magnons and Neanderthals
- Features of hunting and fishing in the Upper Paleolithic
- Adaptation of ancient humans to harsh climatic conditions
- Evolution of dwelling types from the Paleolithic to modern times
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