Top Qs
Timeline
Chat
Perspective
Pen Formation
From Wikipedia, the free encyclopedia
Remove ads
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 ankylosaurs Acantholipan and CPC 273 have also been found in the Pen Formation.[2]
Footnotes
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads