Coniophis is an extinct genus of snakes with fossils reported from the Cretaceous and Paleogene periods, spanning the K-Pg boundary. The type species is Coniophis precedes, described in 1892 by Othniel Charles Marsh based on a vertebra from the Laramie Formation of Wyoming, United States. A number of other species of the genus Coniophis, have been described. Their affiliation is, however, poorly secured, mostly based on vertebral descriptions from only a few fossils.
Fossil distribution The genus Coniophis has been regarded as a wastebasket taxon, and the monophyly of its species has been questioned. Regardless, fossils of Coniophis have been described from the following localities:Coniophis Marsh, 1892 in GBIF Secretariat (2017). GBIF Backbone Taxonomy. Checklist Dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2018-04-06.
Cretaceous Milk River and Frenchman Formations, Canada (Alberta, Saskatchewan) Intertrappean Beds, India Wadi Milk Formation, Sudan United States Hell Creek Formation, Montana Fruitland Formation, New Mexico Naturita, Cedar Mountain, Straight Cliffs, Kaiparowits and Wahweap Formations, Utah Lance Formation, Wyoming
Paleocene Santa Lucía Formation (Tiupampan), Bolivia Jbel Guersif Formation, Morocco Fort Union Formation, Montana, United States
Eocene Itaboraí Formation, Brazil France Aït Ouarhitane Formation, Morocco United States Chadron Formation, North Dakota Bridger, Wagon Bed and Wasatch Formations, Wyoming
References
Further reading Adriana María Albino: In: Ameghiniana 27, 1991. S. 337–342. Sebastián Apesteguía, Hussam Zaher: In: 440, 2006. , S. 1037–1040. Judy Gail Armstrong-Ziegler: In: 52 (2), 1978. S. 480–483. Marc Augé, Jean-Claude Rage: In: 92, 2006. , S. 235–253. Richard Estes: In: 50, 1976. S. 500–520. Richard C. Fox: In: 12, 1975. S. 1557–1563. James D. Gardner, Richard L. Cifelli: In: David M. Unwin: 60, 1999. S. 87–100. Robert Hoffstetter: In: Jean Piveteau: Masson, Paris 1955. S. 606–662 J. Alan Holman: Indiana University Press, Bloomington 2000. . Nicholas R. Longrich, Bhart-Anjan S. Bhullar, Jacques A. Gauthier: In: Nature, 2012. , S. 1–4. Nicholas R. Longrich, Bhart-Anjan S. Bhullar, Jacques A. Gauthier: In: Nature, 2012. , S. 1–10. Othniel Charles Marsh: In: 43, 1892. S. 449–453. Paul Orman McGrew, Max K. Hecht, John M. Hummel, George Gaylord Simpson, Albert Elmer Wood: In: 117, 1959. S. 117–176. (Volltext) Jean-Claude Rage: In: Palaeontographica Abteilung A 25, 1988. S. 3–27. Jean-Claude Rage, C. Werner: In: Palaeontologia Africana 35, 1999. S. 85–110. Jean-Claude Rage, Guntupalli V.R. Prasad, Sunil Bajpai: In: 25, 2004. , S. 425–434. Jean-Claude Rage, Marc Augé: In: Geobios 42, 2010. , 253–268.