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The trilobites are a diverse class of widespread arthropods from the Terrenuevian-Lopingian of the entire world. They, as a whole, were named by Johann Ernst Immanuel Walch in 1771. They were one of the most successful animals to exist (roaming the seas for about 270 million years), and have a thorax that can be split into 3 lobes, thus the meaning of their name, "three-lobed".

PhysiologyEdit

Trilobites were unique arthropods. They had a body consisting of three body parts (the cephalon, the thorax, and the pygidium), lots of pairs of walking legs, a thorax consisting of 3 lobes, large calcite eyes (located on the cephalon), long antenna (also located on the cephalon), and in some cases, spines. Their bodies would have been covered in a hard, chitinous exoskeleton.

DietEdit

Trilobites were carnivores, either living as predators, scavengers, or filter feeders. In predatory trilobites, the first pair of walking legs were modified into claws connected to small spines, which were used to tear prey items into pieces and, in some cases, crush their hard shells.

Trilobite genera (note that those are not all the ones that exist)Edit

RedlichiaEdit

Redlichia
Classification
Kingdom Animalia
Phylum Arthropoda
Class Trilobita
Order Redlichiida
Suborder Redlichiina
Family Redlichiidae
Genus Redlichia
1st Species Redlichia noetlingi
2nd Species Redlichia forresti
3rd Species Redlichia chinensis
4th Species Redlichia ideona
Other attributes
Time Range 520-510 mya
Location China, Korea, Pakistan, Nepal, Iran, Spain, Siberia, Antarctica, Australia
Name Meaning Redlich's animal
Physical Dimensions 25 centimeters long
Dietary Classification Carnivore

Redlichia is a redlichiid redlichiid trilobite from the Cambrian Series 2 of China, Korea, Pakistan, Nepal, Iran, Spain, Siberia, Antarctica, and Australia. It was officially named in 1902 by Maurice Cossmann. It was one of the largest trilobites, only beaten in size by the later Isotelus. It was a predator, preying on smaller hard-shelled arthropods as well as other small invertebrates.


















OlenoidesEdit

Olenoides
Classification
Kingdom Animalia
Phylum Arthropoda
Class Trilobita
Order Corynexochida
Family Dorypygidae
Genus Olenoides
1st Species Olenoides nevadensis
2nd Species Olenoides serratus
Other attributes
Time Range 508-500 mya
Location Canada, United States of America, Greenland, Kazakhstan, Russia
Name Meaning Olenus form
Physical Dimensions 10 centimeters long
Dietary Classification Carnivore

Olenoides is a dorypygid corynexochid trilobite from the Cambrian Series 3 of Canada, the United States of America, Greenland, Kazakhstan, and Russia. It was named in 1877 by Fielding Bradford Meek. It was the most common trilobite in Cambrian Canada, and by extension, one of the most common arthropods (only beaten by Waptia and Marrella). It was a predator, preying on small invertebrates.















CheirurusEdit

Cheirurus
Classification
Kingdom Animalia
Phylum Arthropoda
Class Trilobita
Order Phacopida
Family Cheiruridae
Genus Cheirurus
1st Species Cheirurus insignis
2nd Species Cheirurus obtusatus
3rd Species Cheirurus pauper
4th Species Cheirurus centralis
Other attributes
Time Range 497-407.6 mya
Location Worldwide
Name Meaning  ???
Physical Dimensions 10 centimeters long
Dietary Classification Carnivore

Cheirurus is a cheirurid phacopid trilobite from the Furongian-Middle Devonian of the entire world. It was named in 1854 by Nils Peter Angelin. It was a very unique trilobite, as it had spines protruding from its cephalon and pygidium to help protect it from predators like eurypterids, lobe-finned fish, and placoderms. It was a predator, preying on small invertebrates.














IsotelusEdit

Isotelus
Classification
Kingdom Animalia
Phylum Arthropoda
Class Trilobita
Order Asaphida
Family Asaphidae
Genus Isotelus
1st Species Isotelus gigas
2nd Species Isotelus maximus
3rd Species Isotelus brachycephalus
4th Species Isotelus rex
Other attributes
Time Range 470-445.2 mya
Location United States of America, Canada
Name Meaning Equal ends
Physical Dimensions 72 centimeters long
Dietary Classification Detritivore

Isotelus is an asaphid asaphid trilobite from the Middle-Late Ordovician of the United States of America and Canada. It was named in 1824 by James Ellsworth De Kay. It was the biggest trilobite to ever live; however, it would still have been prey to predators like Cameroceras. It was a detritivore.















PhacopsEdit

Phacops
Classification
Kingdom Animalia
Phylum Arthropoda
Class Trilobita
Order Phacopida
Family Phacopidae
Genus Phacops
1st Species Phacops latifrons
2nd Species Phacops granulatus
3rd Species Phacops accipitrinus
4th Species Phacops breviceps
Other attributes
Time Range 400-360.7 mya
Location Worldwide
Name Meaning Lens eye
Physical Dimensions 5.1 centimeters long
Dietary Classification Carnivore

Phacops is a phacopid phacopid trilobite from the Early-Late Devonian of the entire world. It was officially named in 1839 by Hermann Friedrich Emmrich. It had complemented the trilobite defense mechanism of rolling up into a ball in a woodlouse-esque manner, mainly to protect itself from predators. It was a detritivore.















In popular cultureEdit

Due to documentaries and books focusing on prehistoric animals, trilobites have become the most popular prehistoric arthropods to have ever existed. Since then, they have been featured in major pieces of media like Fantasia and Chased by Sea Monsters. So far, their biggest public appearance was in the first episode of the 2005 documentary, Walking with Monsters, where the Asian trilobite genus, Redlichia, was shown as a common animal in Cambrian China, as well as prey for the Earth's first superpredator, Anomalocaris.

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