Anisopyge

Anisopyge Temporal range: Kungurian-Capitanian279–259 Ma PreꞒ Ꞓ O S D C P T J K Pg N [1]
A. perannulata fossil fragments
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Proetida
Family:	†Phillipsiidae
Subfamily:	†Ditomopyginae
Genus:	†Anisopyge

Anisopyge is an extinct genus of trilobite belonging to the order Proetida and family Phillipsiidae.[2] Specimens have been found in Permian beds in North and Central America.[3][4]

The genus was among the last surviving trilobite groups. It may have evolved from Sevillea, diversifying to fill empty ecological niches.[4]

Species

• A. cooperi Brezinski 1992[5]
• A. hyperbola Chamberlain 1972[4]
• A. inornata Girty 1909[6]
• A. perannulata Shumard 1858[7]

References

1. "Anisopyge Girty 1909 (trilobite)". Fossilworks.org.
2. Owens, R. M. (2003). "The stratigraphical distribution and extinctions of Permian trilobites". Special Papers in Palaeontology. 70: 377–397.
3. Chamberlain, C.K. (1970). "Permian trilobite species from central Wyoming and west Texas". Journal of Paleontology. 44 (6): 1049–1054.
4. Chamberlain, C.K. (1972). "Evolution of the Permian trilobite Anisopyge". Journal of Paleontology. 46 (4): 503–508. JSTOR 1302996.
5. Brezinski, David K. (November 1992). "Permian trilobites from West Texas". Journal of Paleontology. 66 (6): 924–943. Bibcode:1992JPal...66..924B. doi:10.1017/S0022336000021028. S2CID 130757075.
6. Cisne, J. L. (1971). "Paleoecology of trilobites of the Kaibab limestone (Permian) in Arizona, Utah, and Nevada". Journal of Paleontology. 45 (3): 525–533.
7. Sour-Tovar, F.; Quiroz-Barroso, S. A.; Quiroz-Barragán, J.; Torres-Martínez, M. A.; González-Mora, S. (2016). "Presencia de Anisopyge perannulata y Ditomopyge cf. D. whitei (Trilobita, Proetidae) en el Pérmico (Guadalupiano medio) de la Formación Las Delicias, Coahuila, norte de México". Paleontología Mexicana. 5: 103–109. Retrieved 22 February 2022.