El Gallo Formation - AbsoluteAstronomy.com

The El Gallo Formation is a geological formation in Mexico whose strata date back to the Late Cretaceous

Late Cretaceous

The Late Cretaceous is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale. Rock strata from this epoch form the Upper Cretaceous series...

. Dinosaur remains are among the fossils that have been recovered from the formation.

Crurotarsans

Crurotarsans of the El Gallo Formation
Genus	Species	Location	Member	Abundance	Notes
Brachychampsa Brachychampsa Brachychampsa is an extinct genus of alligatoroid. Specimens have been found from New Mexico, Colorado, Wyoming, Montana, North and South Dakota, New Jersey, and Saskatchewan. One specimen has been found from the Darbasa Formation of Kazakhstan, although the species status is indeterminant for the...
Leidyosuchus Leidyosuchus Leidyosuchus is an extinct genus of alligatoroid from the Late Cretaceous of Alberta. It was named in 1907 by Lawrence Lambe, and the type species is L. canadensis. It is known from a number of specimens from the middle Campanian age Dinosaur Park Formation...

Dinosaurs

Dinosaur eggs are known from the formation. Alexornis antecedens actually comes from the La Bocana Roja Formation

La Bocana Roja Formation

The La Bocana Roja Formation is a geological formation in Baja California, Mexico whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.-Vertebrate paleofauna:-References:...

Dinosaurs of the El Gallo Formation
Genus	Species	Location	Member	Abundance	Notes	Images
Chirostenotes Chirostenotes Chirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous of Alberta, Canada. The type species is Chirostenotes pergracilis. Some researchers recognize a second species, C...
Hypacrosaurus Hypacrosaurus Hypacrosaurus was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight...	Indeterminate				Later referred to Lambeosaurus.
Euoplocephalus Euoplocephalus Euoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the...	Indeterminate
Lambeosaurus Lambeosaurus Lambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...	L. laticaudus			"Isolated skull and posctranial elements."
Saurornithoides Saurornithoides Saurornithoides is a genus of troodontid maniraptoran dinosaur, living during the Late Cretaceous period. These creatures were predators, which could run fast on their hind legs and had excellent sight and hearing...
Saurornitholestes Saurornitholestes Saurornitholestes is a genus of carnivorous dromaeosaurid theropod dinosaur from the late Cretaceous of Alberta, Montana and New Mexico....	Indeterminate
Troodon Troodon Troodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...	T. formosus

Lepidosaurs

Lepidosaurs of the El Gallo Formation
Genus	Species	Location	Member	Abundance	Notes
Paraglyphanodon	Indeterminate				Probably a juvenile Polyglyphanodon.
Polyglyphanodon	P. bajaensis

Mammals

Mammal Mammal Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young... s of the El Gallo Formation
Genus	Species	Location	Stratigraphic position	Abundance	Notes
Mesodma Mesodma Mesodma is an extinct genus of mammal, a member of the extinct order Multituberculata within the suborder Cimolodonta, family Neoplagiaulacidae. It lived during the upper Cretaceous and Paleocene Periods of what is now North America...	M. formosa
Pediomys	Indeterminate
Stygimys Stygimys Stygimys is an extinct mammal genus from the Upper Cretaceous and Paleocene of North America. It was a member of the extinct order Multituberculata within the suborder Cimolodonta, family Eucosmodontidae....	Indeterminate

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