The Los Alamitos Formation is a geological formation of the North Patagonian Massif in Rio Negro Province, northwestern Patagonia, Argentina, whose strata date back to the Late Cretaceous (Late Campanian to Maastrichtian). Dinosaur remains are among the fossils that have been recovered from the formation.

Fossil content

Paleogeography of the Late Cretaceous with Los Alamitos Formation indicated

Dinosaurs

GenusSpeciesMaterialNotesImages
AeolosaurusA. rionegrinusA titanosaur.
AlamitornisA. minutusAn ornithuromorph.
HuallasaurusH. australis"Partial skulls with associated postcrania, approximately [five] individuals."A hadrosaur formally named "Kritosaurus" australis.
cf. Hesperornithes
Indeterminate theropod
Indeterminate ornithurine
Indeterminate avian

Rhynchocephalians

GenusSpeciesMaterialNotesImages
AlamitosphenosA. mineri
KawasphenodonK. expectatus

Snakes

GenusSpeciesMaterialNotesImaes
AlamitophisA. argentinus

Turtles

GenusSpeciesMaterialNotesImages
PatagoniaemysP. aeschyli

Mammaliaforms

GenusSpeciesMaterialNotesImages
AlamitheriumA. bishopi
AustrotriconodonA. sepulvedai
A. mckennai
LeonardusL. cuspidatus
BondesiusB. ferox
BrandoniaB. intermedia
CasamiqueliaC. rionegrina
FerugliotheriumF. windhauseni
GondwanatheriumG. patagonicum
GroebertheriumG. novasi
MesungulatumM. houssayi
ParaungulatumP. rectangularis
ReigitheriumR. bunodontum
RougiertheriumR. tricuspes

See also

Bibliography