Trilobites of the Devonian -  The Anti-Atlas Mountains Legacy

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Trilobites of the Devonian - The Anti-Atlas Mountains Legacy


The Devonian period, often called the “Age of Fishes,” was a time of significant evolutionary change and diversification. However, it was not only the fishes that flourished during this era; the trilobites, with their remarkable resilience and adaptability, continued to thrive. Among the most fascinating locations for Devonian trilobites is the Anti-Atlas Mountains, particularly the Tafilalt region in Morocco, which has yielded some of the most well-preserved and scientifically valuable specimens.

A Window into the Past

The Anti-Atlas Mountains offer a unique window into the Devonian seas, with an exceptionally well-documented biostratigraphic record. The region’s paleogeography is characterized by shallow basins and pelagic platforms, with the Tafilalt Platform being a dominant feature. This area provides insights into the diverse marine ecosystems where trilobites lived.

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Devonian Trilobites of Tafilalt

The trilobites from the Devonian strata of the Tafilalt region are notable for their diversity and state of preservation. The Erbenochile Bed, located at the base of the El Otfal Formation near Jbel Issoumour, is particularly renowned. It contains numerous complete trilobites, including species such as Erbenochile issoumourensisAcanthopyge (Lobopyge) bassei, and Walliserops lindoei. These fossils provide a detailed look at the morphology and evolutionary adaptations of Devonian trilobites.

Scientific Significance

The trilobites of the Anti-Atlas Mountains are not just aesthetically pleasing fossils; they are crucial to our understanding of Devonian ecosystems. They help paleontologists reconstruct the ancient marine environments and understand the evolutionary history of arthropods. The well-preserved, articulated specimens from formations like the Ihandar Formation have shed light on previously little-known genera and clarified their morphology.

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  • Wendt, J. (2021). 
  • Chatterton, B. D. E., & Gibb, S. (2015)
  • Johnson, R. A., & Fortey, R. A. (2012).