Los Alamitos Formation

Coordinates: 42°06′S 66°18′W / 42.1°S 66.3°W / -42.1; -66.3
Source: Wikipedia, the free encyclopedia.
Not to be confused with Alamitos Formation.
Los Alamitos Formation
Ma
Type
Approximate paleocoordinates
45°00′S 52°18′W / 45.0°S 52.3°W / -45.0; -52.3
RegionRío Negro Province
CountryArgentina
ExtentNorth Patagonian Massif
Los Alamitos Formation is located in Argentina
Los Alamitos Formation

The Los Alamitos Formation is a geological

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.[1]

Fossil content

Paleogeography of the Late Cretaceous with Los Alamitos Formation indicated

Dinosaurs

Non-avian dinosaurs reported from Los Alamitos Formation
Genus Species Material Notes Images
Aeolosaurus A. rionegrinus
Huallasaurus (="Kritosaurus" australis) H. australis "Partial skulls with associated postcrania, approximately [five] individuals."
[2][3][4]
Indeterminate
theropod

Birds

Birds reported from the Los Alamitos Formation
Genus Species Material Notes Images
Alamitornis A. minutus
cf. Hesperornithes
Indeterminate
Ornithurine
Indeterminate Avian

Rhynchocephalians

Rhynchocephalians reported from the Los Alamitos Formation
Genus Species Material Notes Images
Alamitosphenos A. mineri
[5]

Mammaliaforms

Mammaliaforms
reported from the Los Alamitos Formation
Genus Species Material Notes Images
Alamitherium A. bishopi
[6]
Austrotriconodon A. sepulvedai
A. mckennai
Leonardus L. cuspidatus
Bondesius B. ferox
Brandonia B. intermedia
Casamiquelia C. rionegrina
Ferugliotherium F. windhauseni
Gondwanatherium G. patagonicum
Groebertherium G. novasi
Mesungulatum M. houssayi
[7]
Paraungulatum P. rectangularis
Reigitherium R. bunodontum
[8]
Rougiertherium R. tricuspes

See also

  • List of dinosaur-bearing rock formations

References

  1. ^ Weishampel et al., 2004, "Dinosaur distribution (Late Cretaceous, South America).", pp.600-604
  2. S2CID 247122005
    .
  3. S2CID 85814033
    .
  4. ^ "Table 20.1," in Weishampel, et al.
  5. doi:10.1016/j.pgeola.2023.09.007
    .
  6. ^ Bonaparte, 1999
  7. ^ Bonaparte & Soria, 1985
  8. ^ Bonaparte, 1990

Bibliography

  • ISBN 0-520-24209-2
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