''Calmonia'' is an extinct genus of

trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...

s. It contains one species: ''C. curvioculata''. Fossils of ''Calmonia'' have been found in the Emsian to Eifelian Ponta Grossa Formation and Chapada Group of

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

, the Belén and Sica Sica Formations of

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

and the

Cordobés Formation The Cordobés Formation is an Early Devonian ( Pragian to Emsian) geologic formation of the Durazno Group in the Paraná Basin in the Durazno Department of central Uruguay. The shallow marine shales preserve trilobite, bivalve, gastropod and b ...

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

.''Calmonia''
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

.org

References

Calmoniidae Phacopida genera Devonian trilobites of South America Devonian Bolivia Fossils of Bolivia Devonian Brazil Fossils of Brazil Devonian Uruguay Fossils of Uruguay Paraná Basin Fossil taxa described in 1913 {{phacopida-stub