''Anisopyge'' is an
extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
trilobite
Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...
belonging to the order
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 ...
and family
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 P ...
.
Specimens have been found in
Permian
The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the s ...
beds in North and Central America.
The genus was among the last surviving trilobite groups. It may have evolved from ''
Sevillea'', diversifying to fill empty ecological niches.
[
]
Species
*''A. cooperi'' Brezinski 1992[
*''A. inornata'' Girty 1909]
References
Paleozoic life
Phillipsiidae
Proetida genera
Permian trilobites
Cisuralian first appearances
Guadalupian extinctions
{{Trilobite-stub