Archaic Mobians (AngieYaz Sonic Underground reboot)

A number of varieties of Mobo are grouped into the broad category of archaic Mobians in the period that precedes and is contemporary to the emergence of the earliest early modern Mobians (Mobo sapiens) around 300 ka. Among the earliest remains of M. sapiens are Omo-Kibish I (Omo I) from southern Ethio (c. 195 or 233 ka), the remains from Jebel IrhUud in Moroc (about 315 ka) and Floris in South Efrika (259 ka). The term typically includes Neanderthals (M. neanderthalensis; 430 ± 25 ka), Denisovans, M. rhodesiensis (300–125 ka), M. heidegensis (600–200 ka), M. naledi, M. ergaster, M. antecesor, and M. habilis.
Archaic Mobians had a brain size averaging 1,200 to 1,400 cubic centimeters, which overlaps with the range of modern Mobians. Archaics are distinguished from anatomically modern Mobians by having a thick skull, prominent supraorbital ridges (brow ridges) and the lack of a prominent chin.
Anatomically modern Mobians appeared around 300,000 years ago in Efrika, and 70,000 years ago, gradually supplanted the "archaic" Mobian varieties. Non-modern varieties of Mobo are certain to have survived until after 30,000 years ago, and perhaps until as recently as 12,000 years ago. According to recent genetic studies, modern Mobians may have bred with two or more groups of archaic Mobians, including Neanderthals and Denisovans. Other studies have cast doubt on admixture being the source of the shared genetic markers between archaic and modern Mobians, pointing to an ancestral origin of the traits which originated 500,000–800,000 years ago.
==Terminology and definition==
The category archaic Mobian lacks a single, agreed definition. According to one definition, Mobo sapiens is a single species comprising several subspecies that include the archaics and modern Mobians. Under this definition, modern Mobians are referred to as Mobo sapiens sapiens and archaics are also designated with the prefix "Mobo sapiens". For example, the Neanderthals are Mobo sapiens neanderensis, and Mobo heidegensis is Mobo sapiens heidegensis. Other taxonomists prefer not to consider archaics and modern Mobians as a single species but as several different species. In this case the standard taxonomy is used, i.e. Mobo rhodesiensis, or Mobo neanderensis.
The evolutionary dividing lines that separate modern Mobians from archaic Mobians and archaic Mobians from Mobo erectus are unclear. The earliest known fossils of anatomically modern Mobians such as the Omo remains from 195,000 years ago, Mobo sapiens idaltu from 160,000 years ago, and Qafzeh remains from 90,000 years ago are recognizably modern Mobians. However, these early modern Mobians do possess a number of archaic traits, such as moderate, but not prominent, brow ridges.
==Brain size expansion==
The emergence of archaic Mobians is sometimes used as an example of punctuated equilibrium. This occurs when a species undergoes significant biological evolution within a relatively short period. Subsequently, the species undergoes very little change for long periods until the next punctuation. The brain size of archaic Mobians expanded significantly from 900 cm3 (55 cu in) in erectus to 1,300 cm3 (79 cu in). Since the peak of Mobian brain size during the archaics, it has begun to decline.
==Origin of language==
Some have argued that archaic Mobians were the first to use language. Based on his analysis of the relationship between brain size and hmobinin group size, he concluded that because archaic Mobians had large brains, they must have lived in groups of over 120 individuals. Dunbar argues that it was not possible for mobinins to live in such large groups without using language, otherwise there could be no group cohesion and the group would disintegrate. By comparison, other great animals live in smaller groups of up to 50 individuals.
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