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Reply to Dino Mozardien

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Read the original article here. The titular person here is a blogger of population genetics and fossils concern Southeast Asia. Here represents among his latest synthesis of modern human origins. I believe it is mostly well done, in particular in regards to alluding to an Asian origin for the LCA of Sapiens, Neanderthals, and Denisovans which he expanded upon here.

The focus for today, however, concerns issues in representing the geographical positioning of Sapiens, which he alludes to a Asian origin, thought eh fossils he uses are not supportive as firmly as he suggests.

For the not-too-long time, fossil evidence did support this narrative, although fossils from the past 150000 years were very rare and even absent in Africa, there were some older human skulls forced to support this narrative. It is different with East Asia, we can find fossils with modern morphology that lived between 190-130 Kya (Zhirendong, Luijiang). Even the signals of dental modernity have appeared since 296 000 years ago (Panxian Dadong), about 100 000 years preceding the modern teeth of Misliya Cave in the Levant (194-177 Kya). And the morphology and modern face shapes have appeared since 900,000 years ago (Yunxian, Nanjing, Zhoukoudian). Includes Dali’s human face (550-260 Kya).

Regarding the evidence of “modern” tendencies, here is what the record shows

Among these sites, Fuyan (Daoxian) Cave, Luna Cave, Zhirendong Cave, and Huanglong Cave are currently considered as the best evidence in support of the early presence of H. sapiens in China, based on a clearer chronostratigraphic context and a more diagnostic morphology. There are other sites such as Ganqian (Tubo; Shen et al. 2001), Tongtianyan (Liujiang; Shen et al. 2002; Yuan, Chen, and Gao 1986), Dingcun (Chen,
Yuan, and Gao 1984; Pei 1985), and Jimuyan (Wei et al. 2011) that we consider of interest to assess the evolution of modern humans in China. However, because of the more ambiguous morphology of the fossils and/or uncertainties about their antiquity they are considered less unequivocal than those from Fuyan Cave, Luna Cave, Zhirendong Cave, and Huanglong Cave.

Liujiang, which the author of the blog post associates with the same interval as Zhirendong from a cave study, Liujiang was not of the sane site, nor was the context firmly grounded. See here for references. As for the interval 130-190k for the Zhiren cave, that exceeded the direct date of 106-110k for the fossils themselves. The date he uses here is from a study on the cave itself.

For Panxian,  I commented on this from another post(now deleted).

The Panxian specimens were mainly archaic, while PH3 was found derived but in no specific fashion.

The facial features he speaks off from 900k from China speaks mainly of the mid-face, and fully modern faces didn’t appear until Antecessor.

Dali, since the 2017 study, was concluded to represent geneflow due to the lack of conformity to local erectus fossils relative to African and European ones.

One of the easily distinguishable features of modern humans is the shape and morphology of the skull. When compared to its predecessors, the modern human skull is more gruff, the face is flatter vertically, the chin protrudes, and the braincase) which is more globular. If a skull has most of these features, then it is classified under our species, modern humans. The older skulls that have been suggested as part of our modern human ancestry are the Omo I and Omo II skulls from Omo Kibish, in southern Ethiopia (Leaky et al. 1967). The two Omo skulls are around 195,000 years old (initially only 130000 years old), have a mixture of archaic and modern features, something that is not surprising if we view them as African archaic humans who probably met their modern human ancestors from elsewhere, before evolving into modern humans. . Because of this, they were both named Homo sapiens idaltu . Idaltu in the Afar language means ‘older’.

The mixture of archaic features would also be expected if early and transitional. somehow this is lost.

Several skulls from East and South Africa also tell about the same thing. Things are thought to have improved when three Herto skulls were found in 1997 around Afar, Ethiopia, aged 154,000-160000 years, which also have mixed archaic and modern craniofacial features . Herto’s skull was found in the same layer containing Middle Stone Age (MSA) and Later Stone Age (LSA) aftefacts. The location and artifacts and age of the Herto man closely match the Out of Africa model , and convince many scientists that the Herto man could be the closest anatomical ancestor of modern humans ( Out of Ethiopia ).

Same as explain before, meanwhile in terms of cranial features China is lacking as far as skulls are concerned.

Some fossils are classified as part of Homo sapiens , such as Omo I and Herto (although they are substantially different, and both still have primitive morphology, and some scientists consider Herto to be a subspecies of Homo sapiens ). Jebel Irhoud’s human status is being debated, some paleoanthropologists openly accept him as a close relative of Homo sapiens , some do not accept it because he considers Jebel Irhoud to be part of archaic Africa , and may even be part of a different evolutionary line from the evolutionary line of Homo sapiens . Florisbad man, previously classified as Homo helmei, it is not sufficient to represent the evolutionary line of Homo sapiens due to its primitive character and absence of a braincase .

He doesn’t provide citation or quotes to demonstrate who thinks thinks way or explain how China solves this with it’s specimens on comparable levels. Outside of teeth that generally don’t go beyond the interval of 120k, China is lacking. While he mentions in the article that the Broken Hill Skull fails as an ancestor, the mixed skulls he mention however are morphologically expected as the study mentions.

Meanwhile, the 130k Braincase of Singa shows modern morphology.

Overall, his latest article does a better job but still presents issues. I’ll summarize them here in this deleted comment.

“Let’s look at Africa. One of the oldest candidates for Homo ergaster , KNM-ER 3733, turns out to be 1.63 million years old, and all specimens from the Turkana Basin have their estimate between 1.6-1.43 million years. Nariokotome Boy or Turkana Boy (KNM-WT 15000; 1.5 million years), which has always been predicted as a representative of Homo erectus , turns out to be in the Homo ergaster evolution line , because it does not have a canine fossa .”
Yet we know that Erectus is oldest in South Africa currently, I even
seen you post this research.
“The Konso skull from Southern Ethiopia is about 1.4 million years old. Buia and Daka (about 1 million years old) best fit the transition between Homo ergaster to Homo rhodesiensis , as well as Gombore II (~ 780 Kya). Daka which is hypothesized asHomo erectus has more morphological similarities to KNM ER3733, so sharing one morphology with Homo antecessor or Homo erectus East Asia does not necessarily make it part of Homo erectus . The youngest Homo ergaster, OH 12, is 780 Kya, has a skull capacity and facial shape similar to that of KNM ER3733. With an age difference of about 8,50000 years, the morphological continuity is still very clear. Imagine if they were still classified as Homo erectus ? Yet it is clear that their evolutionary path does not lead to the Homo sapiens line of evolution. In addition, some of the morphologies of OH 12 are also similar to KNM ER3883, D2282 and D2700.”
Some references for the affinities?
“The Homo habilis specimens from Koobi Fora range from 1.75 to 1.65 million years old. If KNM-ER 1802 is classified as Homo habilis (we must first verify it based on the presence of canine fossa , or it could be Homo rudolfensis , represented by KNM ER 62000), then the origin of its appearance is about 2 million years ago. So far, specimens representing Homo habilis claim the shallow canine fossaincluding OH 24, OH 62, OH 65, KNM-ER 1813, and KNM-ER 42703 with a time span of 1.86-1.44 million years (but still needs to be investigated further due to limited references). Of course this is younger when compared to Longgudong human teeth, more than 2.14 million years old. In fact, in several locations in Ciscaucasus there are many traces of artifacts that are more than 2 million years old.”
The problem here is that Koobi Floora isn’t the oldest Habilis, the oldest is 2.3 mya years old in Afar. In fact the oldest Homo (that is broken away from Australopithecus morphologically) is 2.5 mya.
Also, as far as artifacts goes, unless you have evidence proving otherwise, both the Oldowan and Achuelean are oldest in Africa at 2.6 and 1.7 mya ago respectively.
“Meanwhile, KNM ER 2598, which was assumed to be a candidate for the Out of Africa I population (with an estimated initial age of 1.88-1.9 million years ago), was found on the surface which may have originated from a younger stratigraphic deposit. KNM-ER 1813 is also estimated to be 1.86 million years old, or to be in the Olduvai Subchron boundary (1.95-1.78 million years ago).”
See above mention of the South Africa find. Also, proof to support this suggestion?
“Alternatively, KNM-ER 1813 and other hominins in Area 123 could be younger than 1.65 million years ago.”
Again, evidence?
 “After 1.65 million years ago, Turkana Basin humans were dominated by Homo ergaster , who was contemporary with Sangiran early humans (Sangiran 4 and S27), but younger than early humans Bumiayu. So, the best candidates for the ancient Javanese ancestors could be between the early humans Dmanisi, or the ancient humans Longgudong (> 2.14 million years) and Yuanmou (1.7-1.72 million years).”
The most recent evidence rules out longgudong, seeing how it is defined best as habilis and distinct from Erectus in regards to the teeth and.
Likewise, studies in 2001 and 2002 place the latter specimen to below
 1 mya, therefore no consensus.
Btw, Naledi does have a Canine Fossa.
Otherwise, I agree with the rest of the article.
Extremely helpful is his January piece on African “ghost” populations.

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