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Portrait reconstruction of I2261
Ancient Individual

A man buried in Peru in the Ancient South America era

I2261
2280 BCE - 2030 BCE
Male
La Galgada, Peru 4,100 Years Ago
Peru
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Chapter I

Identity

The biological and cultural markers that define this ancient individual

Sample ID

I2261

Date Range

2280 BCE - 2030 BCE

Biological Sex

Male

mtDNA Haplogroup

C1c

Y-DNA Haplogroup

Q-M902

Cultural Period

La Galgada, Peru 4,100 Years Ago

Chapter II

Place

Where this individual was discovered

Country Peru
Locality La Galgada. Highlands
Chapter III

Time

When this individual lived in the broader context of human history

I2261 2280 BCE - 2030 BCE
Chapter IV

Story

The narrative of this ancient life

La Galgada is an archaeological site in Peru that provides significant insights into the early Andean civilizations of South America around 4,100 years ago. Situated in the North-Central Andes along the Tablachaca River, a tributary of the Santa River, La Galgada represents a complex society that thrived during what is known as the Preceramic Period or Late Archaic period. This era in Andean history is marked by the emergence of sedentary communities, social stratification, and the inception of monumental architecture.

Geographical and Environmental Context

La Galgada is located in a region characterized by its diverse ecological zones, from coastal areas to highland plateaus. This geographical diversity allowed early inhabitants to exploit a wide range of resources. The proximity to the river facilitated agriculture, which played a central role in sustaining the community and contributing to its growth and eventual complexity. The site's elevation and the surrounding fertile terraces were conducive to the cultivation of crops like beans, squash, and possibly maize, which were supplemented by hunting, fishing, and gathering.

Architectural Features

One of the most striking aspects of La Galgada is its architecture. The site is renowned for its round and rectangular, stone-constructed ceremonial buildings. These structures are sophisticated, featuring plazas, terraces, and staircases. The main architectural feature of La Galgada is its two large mounds, which were built in phases over centuries. These mounds are believed to have served ceremonial purposes and indicate a high level of organizational skill and labor mobilization.

The structures at La Galgada were constructed using locally available materials, primarily stone and mud. The buildings feature intricate design aspects with niches, vents, and chambers that likely had ritual significance. The ceremonial mounds were not simply temples but were also used as burial sites, indicating the integration of religious and mortuary practices.

Social and Cultural Aspects

The people of La Galgada are considered to have been part of a complex society with emerging social stratification. This inference is drawn from the differences in burial practices and grave goods. Elites were likely interred in the ceremonial mounds, with offerings that suggest belief in an afterlife and status differentiation within the community.

Religion and ritual played a crucial role in La Galgada's society. The ceremonial architecture suggests religious activities were central to community life, serving as a unifying force and a means of social control. The presence of specific architectural features like the \sunken circular courts" points towards astronomical observations linked to agricultural cycles or religious events.

Technological and Economic Developments

La Galgada existed during a time of technological innovation and adaptation. The community was adept at agriculture, which formed the backbone of its economy. The development and management of irrigation systems would have been crucial in this semi-arid region, allowing for stable food production. The site's inhabitants also practiced textile production, and evidence suggests an early use of cotton.

Trade and exchange likely extended beyond the immediate region, as indicated by the presence of exotic materials such as Spondylus shells and obsidian. These materials suggest a trade network that connected La Galgada with distant coastal and highland societies, facilitating the exchange of goods, ideas, and cultural practices.

Legacy and Importance

La Galgada is significant for its role in showcasing the developmental trajectory of early Andean civilizations. It represents a transition from nomadic hunter-gatherer groups to more stable, agricultural societies with complex social structures. The site's innovative use of architecture and ceremony provides insight into the sociopolitical organization and ceremonial life of preceramic Andean societies.

In sum, La Galgada stands as a testament to early human ingenuity in adapting to and flourishing within the Andean environment. Its study contributes to a broader understanding of the region’s prehistoric development and its influence on subsequent cultures, such as the Chavín, which would come to dominate the Andean landscape in later periods."

Chapter V

Genetics

The genetic ancestry of this ancient individual

Ancient Genetic Admixture

This analysis compares the DNA profile of I2261 with ancient reference populations, showing the genetic composition in terms of prehistoric ancestral groups.

Ancient Native Americans 82.9%
Ancient Asians 17.1%

Modern Genetic Admixture

This analysis compares the DNA profile with present-day reference populations, showing what percentage of genetic makeup resembles modern populations from different regions.

America 88.7%
America 88.7%
Native American 88.7%
Asia 11.3%
Chinese & Southeast Asian 11.3%
Chinese 11.3%

Closest Modern Populations

These are the modern populations showing the closest statistical alignment to A man buried in Peru in the Ancient South America era, ranked by genetic distance. Lower distance values indicate closer statistical similarity.

1
Piapoco
1.7403
2
Wichi
1.9304
3
Aymara
2.2916
4
Yukpa
2.3848
5
Karitiana
2.6500
6
Bolivian Lapaz
3.5348
7
Surui
3.7187
8
Colla
3.9652
9
Cachi
4.6446
10
Mixe
5.0255
Chapter VI

Context

Other ancient individuals connected to this sample

Sources

References

Scientific publications and genetic data

Scientific Publication

Reconstructing the Deep Population History of Central and South America

Authors Posth C, Nakatsuka N, Lazaridis I
Abstract

We report genome-wide ancient DNA from 49 individuals forming four parallel time transects in Belize, Brazil, the Central Andes, and the Southern Cone, each dating to at least ∼9,000 years ago. The common ancestral population radiated rapidly from just one of the two early branches that contributed to Native Americans today. We document two previously unappreciated streams of gene flow between North and South America. One affected the Central Andes by ∼4,200 years ago, while the other explains an affinity between the oldest North American genome associated with the Clovis culture and the oldest Central and South Americans from Chile, Brazil, and Belize. However, this was not the primary source for later South Americans, as the other ancient individuals derive from lineages without specific affinity to the Clovis-associated genome, suggesting a population replacement that began at least 9,000 years ago and was followed by substantial population continuity in multiple regions.

G25 Coordinates

The G25 coordinates for sample I2261 can be used for detailed admixture analysis in our G25 Studio tool.

I2261,0.05686742,-0.31598898,0.1127297,0.10259188,-0.11611498,-0.01000764,-0.30988352,-0.36439562,-0.01546428,-0.01740786,0.00066212,-0.00092458,-0.0012278,0.02597016,-0.00569672,-0.00032398,0.00617178,0.00313652,0.00052576,-0.00193832,-0.00125676,0.00835114,-0.00271478,-0.00538922,-0.00602867
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