In any case, shows clear trends in the modern direction, and I personally think that the most parsimonious answer is that erectus is an ancestor of modern humans, and not an evolutionary dead-end. Considering it is within the human range at all, it makes it unlikely that this would have prevented the capacity for speech, and since it is a juvenile specimen, sweeping statements about the species capacity for language based on this trait is very weak. This fairly complete cranium is responsible for sinking the single species concept as a hard and fast rule. This is usually considered the remains of a female due to the decreased level of robusticity compared to conspecifics such as 7 or Sangiran 17 from Java.The Zhoukoudian occipital bones are strongly flexed with a broad torus across the bone’s width.The Middle Pleistocene is where the modern human postcrania develops, the modern cranial features begin to develop, and significant increases in brain size occur.
In Indonesia, this hypothesized lineage begins with Modjokerto, moves on through Sangiran 17, the material from Sambungmachan, Ngandong, all the way through present day Javanese.
Some of the traits that are cited to link this lineage together includes: (or the various species which may be subsumed under that appellation) are extremely important in the study of modern human origins.
The time of the split between humans and living apes used to be thought to have occurred 15 to 20 million years ago, or even up to 30 or 40 million years ago.
Some apes occurring within that time period, such as Ramapithecus, used to be considered as hominids, and possible ancestors of humans.
The Asian specimens show some general differences from African erectus, including more robust ridges of bone with the walls of the skull greatly thickened.
The Javanese specimens are a source of great controversy.He had little success in Sumatra, but found unearthed a thick mineralized hominid skull near the bank of the Solo River in Java.Dubois made his find public a few years later, and was met by derision from the dominant British paleontological hierarchy.This specimen was discovered by a farmer at Sangiran, Java, Indonesia, in 1969.Sangiran 17 has been an important specimen for those who accept the multiregional hypothesis that has with gene flow being maintained between various African, Asian, and European populations.Specimens like Sangiran 17 and Trinil 2 have been dated to approximately 800 kyr and 400 kyr, respectively.Tags: Adult Dating, affair dating, sex dating