Lecho Formation
| Lecho Formation Stratigraphic range: Late Cretaceous |
|
|---|---|
| Type | Geological formation |
| Underlies | Yacoraite Formation |
| Location | |
| Region | South America |
The Lecho Formation is a geological formation in Argentina whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1]
According to Frankfurt and Chiappe (1999), the Lecho Formation is located in northwestern Argentina and is composed of reddish sandstones. The Lecho is part of the Upper/Late Cretaceous Balbuena Subgroup (Salta Group), which is a near-border stratigraphic unit of the Andean sedimentary basin. The paleoenvironment was a fluvio-lacustrine coastal plain. Fossils from this formation include the titanosaur Saltasaurus along with a variety of avian and non-avian theropods.
|
Vertebrate paleofauna
| Dinosaurs reported from the Lecho Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|
E. bonapartei |
Scapula, partial coracoid, humerus, partial radius, partial ulna[2] |
Enantiornithes |
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|
E. leali[3] |
"Postcranial elements."[4] |
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|
L. bretincola[3] |
"Tarsometatarsus and tibiotarsus."[4] |
Enantiornithes |
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|
M. minor |
Partial humerus[2] |
Enantiornithes |
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|
M. saltariensis |
Humerus[2] |
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|
M. vincei |
Humeri[2] |
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|
M. whetstonei |
Partial humerus[2] |
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|
N. leali[3] |
Isolated elements from the head and foot, as well as a verebral arch.[5] A putative oviraptorosaurian cervical vertebra [6] is likely to belong to this taxon.[7] |
|||||
|
S. loricatus[3] |
"Partial skeletons of at least [six] individuals, including jaws and armor."[8] |
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|
S. australis[3] |
"Tarsometatarsus and phalanges."[9] |
Avisaurid enantiornithes |
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|
Y. brevipedalis[3] |
"Tarsometatarsi."[9] |
Enantiornithes |
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See also
Footnotes
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- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.
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- ↑ Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 600-604. ISBN 0-520-24209-2.
- ↑ 2.0 2.1 2.2 2.3 2.4 Walker and Dyke (2009). "Euenantiornithine birds from the Late Cretaceous of El Brete (Argentina)." Irish Journal of Earth Sciences, 27: 15-62.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 "63.7 Provincia de Salta, Argentina; 3. Lower Kirtland Formation," in Weishampel, et al. (2004). Page 603.
- ↑ 4.0 4.1 "Table 11.1," in Weishampel, et al. (2004). Page 213.
- ↑ "Table 3.1," in Weishampel, et al. (2004). Page 49.
- ↑ Frankfurt, N.G., and L.M. Chiappe (1999). "A Possible Oviraptorosaur From The Late Cretaceous of Northwestern Argentina," Journal of Vertebrate Paleontology, 19(1): 101-105.
- ↑ Agnolin, F.L., and Martinelli, A.G. (2007) "Did oviraptorosaurs (Dinosauria; Theropoda) inhabit Argentina?" Cretaceous Research, 28: 785-790.
- ↑ "Table 13.1," in Weishampel, et al. (2004). Page 270.
- ↑ 9.0 9.1 "Table 11.1," in Weishampel, et al. (2004). Page 214.
