Moreno Formation Explained

Moreno Formation
Type:	Geological formation
Period:	Maastrichtian
Prilithology:	Shale
Otherlithology:	Sandstone
Country:	United States
Unitof:	Chico Group
Underlies:	Unconformity with the Martinez Formation and Tejon Formation
Overlies:	Panoche Formation
Thickness:	1600-

The Moreno Formation is a Mesozoic geologic formation located in San Joaquin Valley (California).
Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[1]

Paleofauna

Ray-finned fish

Ray-finned fishes reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Bonnerichthys^[2]	B. gladius				A large, filter-feeding pachycormid.
Saurodon^[3]	S. sp.				An ichthyodectid.

Dinosaurs

Dinosaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Augustynolophus^[4]	A. morrisi				saurolophine.
Saurolophus	S. morrisi				Reclassified as Augustynolophus morrisi.

Mosasaurs

Mosasaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Kolposaurus^[5]	K. bennisoni				The name Kolposaurus was preoccupied and its two constituent species moved to the new genus Plotosaurus.
	K. tuckeri
Plesiotylosaurus^[6]	P. crassidens
Plotosaurus	P. bennisoni
	P. tuckeri				A junior synonym of P. bennisoni.
Prognathodon^[7]	P. cf. waiparaensis
cf. Mosasaurus	cf. M. sp.
Halisaurus	H. sp.

Plesiosaurs

Plesiosaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Aphrosaurus^[8]	A. furlongi
Fresnosaurus	F. drescheri
Hydrotherosaurus	H. alexandrae
Morenosaurus	M. stocki

Turtles

Testudines reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Adocus					J. Howard Hutchison later referred the specimen originally identified as Adocus by to the genus Basilemys.^[9]
Basilemys
Osteopygis^[10]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera

References

• Hilton, Richard P. 2003. Dinosaurs and Other Mesozoic Reptiles of California. Berkeley: University of California Press. 318 pp.
• Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. .

Notes and References

1. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
2. Friedman . Matt . Shimada . Kenshu . Everhart . Michael J. . Irwin . Kelly J. . Grandstaff . Barbara S. . Stewart . J. D. . Geographic and stratigraphic distribution of the Late Cretaceous suspension-feeding bony fish Bonnerichthys gladius (Teleostei, Pachycormiformes) . Journal of Vertebrate Paleontology . 8 January 2013 . 33 . 1 . 35–47 . 10.1080/02724634.2012.713059 . 128958842 .
3. Friedman . Matt . Shimada . Kenshu . Everhart . Michael J. . Irwin . Kelly J. . Grandstaff . Barbara S. . Stewart . J. D. . Geographic and stratigraphic distribution of the Late Cretaceous suspension-feeding bony fish Bonnerichthys gladius (Teleostei, Pachycormiformes) . Journal of Vertebrate Paleontology . 8 January 2013 . 33 . 1 . 35–47 . 10.1080/02724634.2012.713059 . 128958842 .
4. Prieto-Márquez . Albert . Wagner . Jonathan R. . Bell . Phil R. . Chiappe . Luis M. . 2014 . The late-surviving 'duck-billed' dinosaur Augustynolophus from the upper Maastrichtian of western North America and crest evolution in Saurolophini . Geological Magazine . 152. 2 . 225–241. 10.1017/S0016756814000284 . 131049979 .
5. "4: The Marine Reptiles; Mosasaurs," in Hilton (2003) p. 107-110
6. "Appendix: Summary of the Mesozoic Reptilian Fossils of California," in Hilton (2003) p. 273
7. Lindgren . Johan . Schulp . Anne . New material of Prognathodon (Squamata: Mosasauridae), and the mosasaur assemblage of the Maastrichtian of California, U.S.A. . Journal of Vertebrate Paleontology . 15 September 2010 . 30 . 5 . 1632–1636 . 10.1080/02724634.2010.501444 . 131124198 .
8. "Appendix: Summary of the Mesozoic Reptilian Fossils of California," in Hilton (2003) p. 276
9. "4: The Marine Reptiles; Turtles," in Hilton (2003) p. 114
10. "Appendix: Summary of the Mesozoic Reptilian Fossils of California," in Hilton (2003) p. 277