Los Alamitos Formation - AbsoluteAstronomy.com

The Los Alamitos Formation is a geological formation in Rio Negro, Argentina 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.

Dinosaurs

Non-avian Dinosaur Dinosaur Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of... s reported from the Los Alamitos Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Aeolosaurus Aeolosaurus Aeolosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. Like most sauropods, it would have been a quadrupedal herbivore with a long neck and tail...	A. rionegrinus
Secernosaurus Secernosaurus Secernosaurus is a genus of herbivorous dinosaur. Secernosaurus was a hadrosaur, a "duck-billed" dinosaur which lived during the Late Cretaceous. Its fossils have been found in Argentina.... (="Kritosaurus" australis Kritosaurus Kritosaurus is an incompletely known but historically important genus of hadrosaurid dinosaur. It lived about 73 million years ago, in the Late Cretaceous of North America... )	S. koerneri			"Partial skulls with associated postcrania, approximately [five] individuals."
Indeterminate Theropod

Bird Bird Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... s reported from the Los Alamitos Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Alamitornis Alamitornis Alamitornis is an extinct genus of basal ornithuromorph bird, possible within the family Patagopterygidae. Remains have been found from the Upper Cretaceous Los Alamitos Formation in Río Negro Province, Argentina. It was first named by Federico L. Agnolin and Agustín G. Martinelli in 2009 and the...	A. minutus
Cf. Hesperornithes Hesperornithes Hesperornithes is an extinct and highly specialized clade of Cretaceous toothed birds. Hesperornithine birds, apparently limited to former aquatic habitats in the Northern Hemisphere, include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and probably Potamornis, all...
Indeterminate Ornithurine
Indeterminate Avian Avian Avian may refer to:* Bird* Avian , an American metal band* AVIAN International, major international company headquartered in Hungary.* Aviano or Avian, an Italian city...

Mammaliaforms

Mammaliaforms reported from the Los Alamitos Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Austrotriconodon	A. sepulvedai A. mckennai
Reigitherium Reigitherium Reigitherium bunodontum is a mammal that lived during the Late Cretaceous . Fossils of it have been found in the Los Alamitos and the La Colonia Formations of Argentina....	R. bunodontum Bonaparte, 1990
Ferugliotherium Ferugliotherium Ferugliotherium is a fossil mammal from the Campanian and/or Maastrichtian of Argentina in the family Ferugliotheriidae. The genus contains a single species, Ferugliotherium windhauseni, which was first described in 1986...	F. windhauseni
Gondwanatherium Gondwanatherium Gondwanatherium is a genus of mammal from the extinct suborder Gondwanatheria that lived in Patagonia, South America during the "Age of Dinosaurs", specifically the Upper Cretaceous....	G. patagonicum
Bondesius	B. ferox
Groebertherium	G. novasi
Leonardus	L. cuspidatus
Mesungulatum	M. houssayi Bonaparte & Soria, 1985
Paraungulatum	P. rectangularis
Brandonia	B. intermedia
Casamiquelia	C. rionegrina
Alamitherium	A. bishopi Bonaparte, 1999
Rougiertherium	R. tricuspes

The source of this article is wikipedia, the free encyclopedia. The text of this article is licensed under the GFDL.