Pen Formation
The Pen Formation is a Campanian-age geologic unit in the western United States.
Vertebrate fauna
Sharks are well known from the Pen Formation.[1]
- Lonchidion selachos[1]
- Squalicorax kaupi[1]
- Cretorectolobus olsoni[1]
- Ischyrhiza mira[1]
- Scapanorhynchus texanus[1]
- S. raphiodon[1]
- Cretolamna appendiculata[1]
Other fishes include Xiphactinus,[1] the ray Ptychotrygon,[1] and gar.[1] The nodosaurid ankylosaur Acantholipan has also been found in the Pen Formation.[2]
Footnotes
- "Big Bend National Park," Hunt, Santucci, and Kenworthy (2006); page 65.
- Héctor E. Rivera-Sylva; Eberhard Frey; Wolfgang Stinnesbeck; Gerardo Carbot-Chanona; Iván E. Sanchez-Uribe; José Rubén Guzmán-Gutiérrez (2018). "Paleodiversity of Late Cretaceous Ankylosauria from Mexico and their phylogenetic significance". Swiss Journal of Palaeontology. in press. doi:10.1007/s13358-018-0153-1.
gollark: play HEAVPOOT GAMEsponsored by osmarks technologieshttps://osmarks.tk/heavscp/
gollark: obtainINTELEC
gollark: Ah yes, right, arachnoapiocommunism then.
gollark: Close enough.
gollark: Authleft want some heavily state-/centrally-controlled economic system , libleft do not, QED, arachnoapeirocommunism best.
References
- Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.