Paleontologists have unearthed 13 fossilized teeth deep within a limestone cave in southern China, belonging to the species Gigantopithecus brachy, the largest known primate species in history. This groundbreaking discovery provides crucial insights into the species’ adaptability during significant climate changes between 1.2 million and 700,000 years ago, thereby filling important gaps in the fossil record.
Artist’s impression of a herd of Gigantopithecus brachy in the forests of southern China. Image credit: Garcia / Joannes-Boyau, Southern Cross University.
Gigantopithecus brachy was an extinct great ape inhabiting the jungles of Southeast Asia.
This impressive primate surpassed modern gorillas, standing up to 3 meters (10 feet) tall and weighing as much as 540 kg.
This species existed from approximately 2.3 million years ago until its extinction roughly between 295,000 and 215,000 years ago.
First described in 1935 by German-Dutch anthropologist Gustav von Königswald, the species was based on an isolated tooth discovered in a Hong Kong pharmacy.
The fossil record for Gigantopithecus brachy includes several thousand teeth and a limited number of jawbones.
“Gigantopithecus brachy is hypothesized to have been the largest primate species,” stated paleontologist Dr. Yanyang Yao from Shandong University, Nanning Normal University, and Guangxi Museum of Anthropology, alongside colleagues in China.
“Their fossil record primarily dates back to the Early Pleistocene and continues into the Middle Pleistocene, but material from the Early to Middle Pleistocene transition (1.2 million to 700,000 years ago) remains relatively rare.”
Yanli Dong, Chongzuo City, Guangxi Province, China. Image credit: Yao et al., doi: 10.16359/j.1000-3193/AAS.2026.0010.
Paleontologists successfully uncovered 13 teeth of Gigantopithecus brachy, including both upper and lower canines, premolars, and molars, at Yanli Cave 1 in Chongzuo City, Guangxi Province, China.
This significant find dates accurately to the Early Middle Pleistocene Transition (EMPT), a period characterized by cooler, drier climates and increasing glacial influence.
Estimated ages of the fossils are derived from associated animal fossils rather than direct dating of the teeth.
Researchers identified specimens from 30 species across six orders, including relatives of orangutans, tigers, clouded leopards, tapirs, Javan rhinos, stegodons, and Asian elephants.
Notably, two species in this assemblage provided valuable information for dating. The Airuropoda oolinshanensis represents a giant panda characteristic of the late Early Pleistocene, while Airuropoda melanoluca bakoni typifies a panda subspecies of the Middle Pleistocene.
The co-occurrence of both species strongly indicates that this deposit was formed during the transition between these two epochs.
“This faunal assemblage is indicative of the biostratigraphic age of EMPT,” the researchers stated.
The fossils of Gigantopithecus brachy found in Yanli Cave 1 appear to showcase ongoing evolutionary changes.
Some specimens exhibit the relatively small tooth sizes typical of early populations, while others approach the larger dimensions found in later populations, likely reflecting dietary adaptations.
“Comparative analyses of tooth dimensions of Gigantopithecus fossils from other sites indicated that some specimens from Yanli Cave 1 retain the smaller size characteristics prevalent in early Early Pleistocene populations,” the scientists noted.
“Conversely, other specimens approach the larger tooth sizes common in late Early Pleistocene populations and the extensive size ranges recorded in Middle Pleistocene populations.”
“These findings align with our biochronological assessments.”
“Following discoveries at Queque Cave and Zhanwang Cave, both located in nearby Chongzuo, Yanli Cave 1 represents the third significant EMPT site. This regional focus is likely to provide essential evidence for understanding dental evolutionary patterns and adaptive strategies in response to climate change during the EMPT.”
The survey results are published in the journal Chinese Anthropology Methods.
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Yanyang Yao et al. 2026. Discovery of Gigantopithecus brachy in Yanli Cave 1, Chongzuo City, Guangxi Zhuang Autonomous Region, during the transition period between the Early and Middle Pleistocene. Chinese Anthropology Methods 45 (02): 199-209; doi: 10.16359/j.1000-3193/AAS.2026.0010
Source: www.sci.news
