''Persiax praecox'' is a species of phillipsiid proetid

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 ...

from

Tournaisian The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. The Tournaisian age lasted from Ma to Ma. It is preceded by the Famennian (the uppermost stage ...

-aged marine strata in what is now Eastern

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

.Lerosey-Aubril, Rudy. "The Late Palaeozoic trilobites of Iran and Armenia and their palaeogeographical significance." Geological Magazine 149.06 (2012): 1023-1045

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Etymology

The original generic name refers to "Persia," the old name of Iran, the country where the type specimen was found. The specific name refers to how it is the earliest known and most primitive phillipsiid of the subfamily Cummingellinae, i.e., that it is the progenitor of Cummingellinae. Because "Persia" as a taxonomic name is preoccupied by a

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

mollusk, ''Persia monstrosa'' Repin 1996, from Early Triassic-aged marine strata of the Salt and Surghar Ranges in Pakistan, ''P. praecox'' was renamed as ''Persiax praecox''.

References

Carboniferous trilobites Philipsidae Proetida genera {{proetida-stub