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Type Specimen
The Dali cranium is a near-complete fossil cranium. The specimen is missing the lower mandible as well as a circular portion of the occipital bone at the rear of the skull. The skull exhibits shorter cranial height, relatively short and arched parietal bones, and an angled occipital bone. The specimen is also defined by a thick brow ridge, which has a slight depression between the eyebrows (Wu & Athreya, 2013).
Site
In 1978, the Dali cranium was discovered in Dali, Shaanxi Province, China, near the Luohe River. The site dates back to the early Paleolithic period and was dated using U-series dating techniques, which utilize the decay chain of uranium isotopes (Bae, 2010). The cranium was discovered in an alluvial gravel layer on the third-level terrace which is 50-80 meters above the level of the Luohe River. (YIN, 2002)
Associated Fossils
Other associated fossils found in the same layer as the Dali cranium include samples of mammal animal tooth and shell fossils. 10 shell samples from two species were dated using ESR (electron spin resonance) dating techniques, which estimated the samples' ages between 210 to 297ka (YIN, 2002). While many mammal teeth fossils were discovered only a few teeth from larger animals are suitable to be dated. A singular tooth from the upper cheek of a coelodonta antiquitatis (woolly rhino), was in the same stratum as the skull and was dated using U-series techniques. While the uranium content of these samples is imperfect due to environmental factors, it’s suggested the tooth fossil ranges from 258 to 349ka (YIN, 2002).
Evolutionary Tree
Homo daliensis along with many other species poorly represented in the Middle Pleistocene fossil record were originally placed into the all inclusive taxa “Archaic Homo sapiens”. These included very distinct specimens with a lot of variation, so there’s been effort to recategorize these more carefully to further speculate on the evolutionary relationships of H. sapiens, H. erectus, and these varying Middle Pleistocene Homo species. Currently, the dali cranium does not have a specific species designation as there is still much debate, which will be discussed later.
Homo daliensis falls between Homo erectus and Homo sapiens on the evolutionary tree (Bae et al., 2023). This period of the fossil record is filled with tentative taxonomic organization. In the original publication by Xinzhi Wu in 1981, he suggested the Dali cranium belonged to a subspecies termed Homo sapiens daliensis. In his later publications, the term 'archaic' Homo sapiens was used to describe which species the specimen belonged to. The term Homo daliensis has resurged in recent years to elevate H. daliensis to the species level (Ping et al., 2024)
Defining Features
Very thick supraorbital torus (brow ridge)
Thick parietal bones (sides and top of skull)
Frontal keeling
Cranium shape (lower vault, yet rounded back of skull)
Presence of extrasutural bones
Angular torus (Thickened bulging bone on the parietal bones, sides of the skull nearer the back for temporalis muscle attachments)
Cranial capacity ~1,120 cm³
When examining Homo daliensis, the thickness of the supraorbital torus (brow ridge) is a notable start. Other features such as the thickness of the parietal bones, frontal keeling, a lower cranial vault, the existence of extrasutural bones, and an angular torus are all shared with H. erectus. The nuchal torus is also a common trait of H. erectus, however with the rear portion of the cranium missing we cannot compare. Dali is estimated to have a cranial capacity of 1,120 cm3 (Wu & Athreya, 2013). For reference, this size falls between that of H. erectus and H. sapiens (Bae, 2010).
Why Is It Distinct?
The Dali cranium has a spread of traits intermediate between H. erectus and H. sapiens that make it unique and urge experts to consider its speciation closely. One instance is the distinct skull shape with a longer and lower cranium, but not to the extent seen in H. erectus, and rounding of the rear skull, reminiscent of human skulls. The shorter skull height contributes to a different face shape with a smaller forehead. Compared to other hominins of the time, the brow ridge is noticeably far more prominent, appearing much thicker. From what remains of the zygomatic arches it's also believed they were more gracile, which is strange considering the thickness of the cranium.
An interesting note is that Asian H.erectus fossils including specimens from Indonesia and China have that unique angular torus (John Hawks Laboratory, 2017). Posing an interesting question about the evolutionary relationship of H. daliensis with Asian variations of H. erectus.
Homo sapiens
Homo sapiens
Dali cranium
Dali cranium
Here's are front view and side views of each species skull for reference
Homo erectus
Homo erectus
The Dali Debate
The Dali Debate
Distinct Species
Distinct Species
Broader Homo Erectus or Homo Heidelbergensis
Broader Homo Erectus or Homo Heidelbergensis
Group with East Asian Fossils to Create New Species
Group with East Asian Fossils to Create New Species
Sources
Athreya, S., & Wu, X. (2017). A multivariate assessment of the Dali hominin cranium from China: Morphological affinities and implications for Pleistocene evolution in East Asia. American Journal of Physical Anthropology, 164(4), 679–701. https://doi.org/10.1002/ajpa.23305
Bae, C. J. (2010). The late Middle Pleistocene hominin fossil record of eastern Asia: Synthesis and review. American Journal of Physical Anthropology, 143(S51), 75–93. https://doi.org/10.1002/ajpa.21442
Bae, C. J., Liu, W., Wu, X., Zhang, Y., & Ni, X. (2023). “Dragon man” prompts rethinking of Middle Pleistocene hominin systematics in Asia. The Innovation, 4(6), 100527–100527. https://doi.org/10.1016/j.xinn.2023.100527
Dali archaic Homo sapiens. (2017). Peterbrown-Palaeoanthropology.net. https://www.peterbrown-palaeoanthropology.net/dali.html
Dorey, F. (2020, October 16). Homo Erectus. The Australian Museum; The Australian Museum. https://australian.museum/learn/science/human-evolution/homo-erectus/
Homo erectus • Becoming Human. (n.d.). Becoming Human. https://becominghuman.org/hominin-fossils/homo-erectus/
John Hawks Laboratory. (2017). Wisc.edu. https://hominin.anthropology.wisc.edu/virtual-lab-indonesia-erectus-crania.html
Medrano, K. (2017, November 14). Ancient Hominin Skull From China Suggests Humans Didn’t Evolve Just From African Ancestors. Newsweek. https://www.newsweek.com/archaeology-skull-evolution-homo-sapiens-homo-erectus-human-710973
Pathological Human Skull #2010 - Female (w/ Cervical Vertebrae). (2021). The Bone Room. https://www.boneroom.com/store/p2550/Pathological_Human_Skull_%232010_-_Female_%28w%2F_Cervical_Vertebrae%29.html
Pin on Photo References for drawing. (2025). Pinterest. https://www.pinterest.com/pin/8303580548764524/
Ping, W., Fu, Q., Yang, Z., Zhang, X., & Xing, S. (2024). Tracing the Origin and Migration of Humans— Significant Progress in Paleoanthropological and Paleolithic Fields Made by IVPP. Bulletin of the Chinese Academy of Sciences, 38, 2024011. https://doi.org/10.1051/bcas/2024011
UCL. (2018, April 28). Multivariate examination of Dali Skull: Early Homo sapiens? Human Evolution @ UCL. https://www.ucl.ac.uk/human-evolution/news/2018/apr/multivariate-examination-dali-skull-early-homo-sapiens
Wu, X., & Athreya, S. (2013). A description of the geological context, discrete traits, and linear morphometrics of the Middle Pleistocene hominin from Dali, Shaanxi Province, China. American Journal of Physical Anthropology, 150(1), 141–157. https://doi.org/10.1002/ajpa.22188
YIN, G. (2002). Chronology of the stratum containing the skull of the Dali Man. Chinese Science Bulletin, 47(15), 1302. https://doi.org/10.1360/02tb9289
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