1.1" Elrathia Kingi Trilobite Fossil Utah Cambrian Age 521 Million Years Old COA
Location: Utah House Range - Antelope Springs, Millard County
Weight: 0.3 Ounces
Dimensions: 1.1 Inches Long, 0.8 Inches Wide, 0.2 Inches Thick
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The item pictured is the one you will receive.
Elrathia Kingi Trilobite
Trilobites are an extinct group of marine arthropods in the class Trilobita, and they rank among the earliest complex animals on Earth. They first appeared around 521 million years ago during the Early Cambrian period, marking the beginning of the Atdabanian stage. These prehistoric creatures thrived in the oceans of the Paleozoic Era and became one of the most significant early arthropods before going extinct long before the rise of dinosaurs.
Trilobites were the first animals to develop a hard exoskeleton, making them highly fossilizable. Their bodies are divided into three longitudinal lobes: a central axial lobe flanked by two pleural lobes, giving them the name “trilobite,” meaning “three-lobed.”
Their anatomy is divided into three main sections:
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Cephalon (head) – with eyes, mouthparts, and sensory organs such as antennae.
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Thorax (middle) – composed of multiple overlapping segments, ranging from 2 to 61.
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Pygidium (tail) – where the segments are fused into a single structure.
Trilobite fossils provide critical insights into Cambrian marine life, early arthropod evolution, and the biodiversity of the Paleozoic oceans. They are highly prized by both paleontologists and fossil collectors for their intricate structures and historical significance.

Please be aware of the nature of fossils:
Being buried under the ground for millions of years under tons of pressure tends to be rough. No fossil comes out of the ground whole and perfect. Most fossils have undergone some restoration, while others are altered by man simply to enhance their presentation in different ways. The workers in the United States do a very professional job, unearthing and preserving these natural treasures