Origin

Trilobites were arthropods that lived in the sea and first appeared during the Cambrian period, approximately 520 million years ago.

It is believed that they moved by walking along the shallow seabed and lived in mud or crevices in rocks.

Their forms diversified over time, and they continued to thrive in the Paleozoic seas for a long period.

Eventually, they disappeared about 250 million years ago during a major environmental change at the end of the Permian period.

Structure — Structure

The body of a trilobite is divided into three regions: a cephalon (head), thorax, and pygidium (tail).

Furthermore, it is longitudinally divided into three parts by a central axial lobe and two lateral pleural lobes, and it is called a "trilobite" due to this characteristic structure.

Its exoskeleton was covered with a hard shell, and it repeatedly molted as it grew.

Some species had compound eyes, and it is thought that they viewed the ancient seas through visual organs made of calcite.

Fossilization — The Process of Fossilization

After their lives ended, their exoskeletons sank to the seabed and were buried in fine sediment.

Hard shells are relatively easy to preserve and remain as fossils over long periods of time.

Depending on the state of preservation, there are specimens where even the fine undulations of the ribs and the structure of the compound eyes can be observed.

Many trilobite fossils are still being discovered in regions such as Morocco.

Scientific Value

Trilobites are important for understanding the early evolution of arthropods.

Due to the significant morphological changes between species and their varying distribution across different periods, they are used as index fossils to determine the age of geological strata.

Furthermore, their exoskeletons, compound eyes, and traces of molting provide clues to deciphering the Paleozoic ecosystem.

Their diverse forms are known as a particularly rich record of evolution within paleontology.

In Spinos - Structures that remain in stone

At Spinos, we value the symmetrical beauty of trilobites.

The undulating segments and delicate lines etched into the exoskeleton evoke a mineral-like serenity, despite being biological organisms.

Softened outlines due to wear, and the shadows and textures preserved within the stone.

Within each specimen, the distant history of the seafloor is quietly encapsulated.

Trilobite Product List