Semicyclocephalus

Semicyclocephalus; Temporal range: Cambrian
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	† Artiopoda
Class:	† Trilobita
Order:	† Ptychopariida
Family:	† Plethopeltidae
Genus:	† Semicyclocephalus ; Ivshin, 1952

Last updated November 18, 2025

Semicyclocephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period,^[1] which lasted from approximately 539 to 485 million years ago.

References

1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-12.

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[Sepkoski-1] 1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-12.

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