Anisopyge Explained

Anisopyge is an extinct genus of trilobite belonging to the order Proetida and family Phillipsiidae.^[1] Specimens have been found in Permian beds in North and Central America.^{[2] [3]}

The genus was among the last surviving trilobite groups. It may have evolved from Sevillea, diversifying to fill empty ecological niches.^[3]

Species

• A. cooperi Brezinski 1992^[4]
• A. hyperbola Chamberlain 1972^[3]
• A. inornata Girty 1909^[5]
• A. perannulata Shumard 1858^[6]

Notes and References

1. R. M. . Owens . 2003 . The stratigraphical distribution and extinctions of Permian trilobites . Special Papers in Palaeontology . 70 . 377–397 .
2. C.K. . Chamberlain . 1970 . Permian trilobite species from central Wyoming and west Texas . Journal of Paleontology . 44 . 6 . 1049–1054.
3. C.K. . Chamberlain . 1972 . Evolution of the Permian trilobite Anisopyge . . 46 . 4 . 503–508 . 1302996.
4. Brezinski . David K. . Permian trilobites from West Texas . Journal of Paleontology . November 1992 . 66 . 6 . 924–943 . 10.1017/S0022336000021028. 1992JPal...66..924B . 130757075 .
5. J. L. . Cisne . 1971 . Paleoecology of trilobites of the Kaibab limestone (Permian) in Arizona, Utah, and Nevada . Journal of Paleontology . 45 . 3 . 525–533.
6. F. . Sour-Tovar . S. A. . Quiroz-Barroso . J. . Quiroz-Barragán . M. A. . Torres-Martínez . S. . González-Mora . 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 . 22 February 2022.