Persiax

	Persiax ''Persiax praecox'' is a species of phillipsiid proetid trilobite from Tournaisian-aged marine strata in what is now Eastern Iran.Lerosey-Aubril, Rudy. "The Late Palaeozoic trilobites of Iran and Armenia and their palaeogeographical significance." Geological Magazine 149.06 (2012): 1023-1045/ref> 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 () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ... mollusk, ''Persia monstrosa'' Repin 1996, from Early Triassic-aged marine str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Phillipsiidae Phillipsiidae is a family of proetid trilobites, the various genera of which comprise some of the last of the trilobites, with a range that extended from the Kinderhookian epoch of the Lower Mississippian, to the end of Changhsingian age at Permian-Triassic extinction event in the latest Permian period. Phillipsiidae is sometimes defined as a subfamily, "Phillipsiinae," and usually placed within the family Proetidae. Jell & Adrain (2003) went so far as to lump Phillipsiidae into the family Proetidae, however other workers since like Lerosey-Aubril and Feist (2005) have continued to recognize Phillipsiidae as a distinct and separate family within Proetida. Subfamilies The following genera are included, divided among six subfamilies: * No subfamily '' Phillipsia'' (type genus In biological taxonomy, the type genus (''genus typica'') is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
	Proetida Proetida is an order of trilobite that lived from the Ordovician to the Permian. It was the last surviving order of trilobite, dying out in the Permian-Triassic extinction event. Description These typically small trilobites resemble those of the order Ptychopariida, from which the new order Proetida was separated in 1975 by Richard Fortey, Fortey and Owens. Like the order Phacopida, the proetids have exoskeletons that sometime have pits or small tubercles, especially on the glabella (trilobite anatomy), glabella (middle portion of the head). Because of their resemblance to the Ptychopariida in some features, the proetids are included in the subclass Librostoma. Unlike the trilobites of the phacopid suborder Phacopina, whose trilobite eye, eyes are Eye#Apposition eyes, schizochroal, the proetids have the more common holochroal eyes. These eyes are characterized by close packing of biconvex Lens (anatomy), lenses beneath a single corneal layer that covers all of the lenses. Each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Cummingellinae Cummingellinae is a subfamily of trilobites in the family Phillipsiidae. They were common in shallow waters in the early Carboniferous of Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east .... One of the last genera of trilobite, '' Paraphillipsia'', was a cummingelline, making this group one of the last trilobites. References External links Proetida Fact Sheet Trilobite subfamilies Taxa described in 1967 Cummingellinae {{Trilobite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Proetida Genera Proetida is an order of trilobite that lived from the Ordovician to the Permian. It was the last surviving order of trilobite, dying out in the Permian-Triassic extinction event. Description These typically small trilobites resemble those of the order Ptychopariida, from which the new order Proetida was separated in 1975 by Fortey and Owens. Like the order Phacopida, the proetids have exoskeletons that sometime have pits or small tubercles, especially on the glabella (middle portion of the head). Because of their resemblance to the Ptychopariida in some features, the proetids are included in the subclass Librostoma. Unlike the trilobites of the phacopid suborder Phacopina, whose eyes are schizochroal, the proetids have the more common holochroal eyes. These eyes are characterized by close packing of biconvex lenses beneath a single corneal layer that covers all of the lenses. Each lens is generally hexagonal in outline and in direct contact with the others. They range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]