Balde de Leyes (Norian, Quebrada del Barro): Norian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Ingentia prima n. gen., n. sp.
Apaldetti et al. 2018
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Apaldetti et al. 2018 | 1 specimen | ||||||||
| PVSJ 1086 | ||||||||||
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Reptilia
- Sphenodontidae
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Sphenotitan leyesi n. gen., n. sp.
Martinez et al. 2013
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9 specimens | |||||||||
| PVSJ 886 (holotype), posterior portion of skull; PVSJ 887, left dentary; PVSJ 888, both incomplete maxillae, anterior part of both lower jaws, both premaxillae; PVSJ 889, left maxilla; PVSJ 890, right quadrate; PVSJ 891, incomplete lower jaws; PVSJ 892, right palatine, pterygoid and ectopterygoid; PVSJ 893, right premaxilla and postorbital, left incomplete palatine and pterygoid; PVSJ 895, articulated sequence of three distal dorsal vertebrae, sacral vertebrae 1 and 2, and first caudal vertebra | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | San Juan | County: | Caucete Department |
| Coordinates: | 31.6° South, 67.4° West (view map) | ||||
| Paleocoordinates: | 40.6° South, 30.3° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Norian | 10 m.y. bin: | Triassic 4 |
| Key time interval: | Norian | ||
| Age range of interval: | 227.00000 - 208.50000 m.y. ago |
Stratigraphy
| Geological group: | Marayes | Formation: | Quebrada del Barro | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: A recent stratigraphic revision (Martinez et al., 2013 (ref. 58021)- supplementary information) proposes that the upper horizon of the Quebrada del Barro containing Leyasaurus marayensis should be classified as a separate stratigraphic unit from the other (lower) horizons of the Quebrada del Barro. The other horizons are assigned to Norian age based on Sphenotitan leyasi occurring in the same horizons as several other Triassic-affinity species. These other species are known from the Norian Los Colorados Fm., which was recently dated using magnetostratigraphy. | |||||
Lithology and environment
| Primary lithology: | red sandstone |
| Secondary lithology: | siltstone |
| Includes fossils? | Y |
| Lithology description: "The Quebrada del Barro Formation is characterized by a bright reddish succession of coarse sandstone and conglomerate interlaid with fine clay-rich mudstone characterized by isolated granules and calcisol development." | |
| Environment: | alluvial fan |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 176414 | ||
| Authorizer: | P. Barrett, G. Lloyd | Enterer: | T. Cleary, G. Lloyd |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2016-02-11 11:30:03 | Last modified: | 2022-04-29 10:25:45 |
| Access level: | the public | Released: | 2016-02-11 11:30:03 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 58021. | R. N. Martinez, C. Apaldetti, C. E. Colombi, A. Praderio, E. Fernandez, P. S. Malnis, G. A. Correa, D. Abelin, and O. Alcober. 2013. A new sphenodontian (Lepidosauria: Rhynchocephalia) from the Late Triassic of Argentina and the early origin of the herbivore opisthodontians. Proceedings of the Royal Society B 280(1772):20132057-1-20132057-7 [P. Barrett/T. Cleary] |
Secondary references:
| 67318 | C. Apaldetti, R. N. MartÃnez, I. A. Cerda, D. Pol, and O. Alcober. 2018. An early trend towards gigantism in Triassic sauropodomorph dinosaurs. Nature Ecology & Evolution 2:1227-1232 [G. Lloyd/G. Lloyd] |