Santa Juana, level FL2, Biobío River: Carnian, Chile
collected by S.V. Nielsen, K. Bandel 1997, 2000
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Insecta
- Hemiptera
- Dysmorphoptilidae
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Bandelnielsenia chilena n. gen., n. sp.
Martins-Neto and Gallego 2003
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1 specimen | |||||||||
| SGO.PI.5989 (1 measurement) | ||||||||||
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Insecta
- Coleoptera
- Ademosynidae
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| Gallego et al. 2005 | 2 specimens | |||||||||
| SGO.PI.6139A,B | ||||||||||
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Insecta
- Coleoptera
- Permosynidae
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Ischichucasyne santajuanaensis n. gen., n. sp.
Martins-Neto and Gallego 2005
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Gallego et al. 2005 | 1 specimen | ||||||||
| SGO.PI.6140 (1 measurement) | ||||||||||
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Branchiopoda
- Diplostraca
- Polygraptidae
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Polygrapta troncosoi
(Gallego 1998)
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Gallego et al. 2005 | |||||||||
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Branchiopoda
- Diplostraca
- Eosestheriidae
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Menucoestheria terneraensis
Gallego 1998
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Gallego et al. 2005 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Chile | State/province: | Concepción |
| Coordinates: | 37.2° South, 73.0° West (view map) | ||
| Paleocoordinates: | 43.5° South, 31.6° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Late Triassic |
| Stage: | Carnian | 10 m.y. bin: | Triassic 3 |
| Key time interval: | Carnian | ||
| Age range of interval: | 237 - 227.3 m.y. ago |
Stratigraphy
| Formation: | Santa Juana | ||||
| Stratigraphy comments: Assigned a Carnian age based on paleoflora and Nielsen (in press) by Gallego et al. (2005), but others have proposed Upper Carnian/Lower Norian (based on marine molluscs) or Upper Carnian to Lower Rhaetian (also on paleoflora). |
Lithology and environment
| Primary lithology: | black lithified mudstone | ||
| Environment: | lacustrine indet. | Tectonic setting: | rift |
| Geology comments: Rivers, lakes, playas and alluvial fans; black mudstones interpreted as lake deposits. | |||
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | mesofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | S.V. Nielsen, K. Bandel | Collection dates: | 1997, 2000 |
| Collection method comments: Specimens kept in SGO-PI – Paleontology Section of the Museo Nacional de Historia Natural, Santiago, Chile. | |||
Metadata
| Database number: | 123024 | ||
| Authorizer: | M. Clapham | Enterer: | J. Karr, M. Clapham |
| Modifier: | M. Clapham | Research group: | paleoentomology |
| Created: | 2012-01-10 10:28:32 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2012-01-10 10:28:32 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 39201. | R. G. Martins-Neto, O. F. Gallego, and R. N. Melchor. 2003. The Triassic insect fauna from South America (Argentina, Brazil and Chile): a checklist (except Blattoptera and Coleoptera) and descriptions of new taxa. Acta Zoologica Cracoviensia 46(Suppl):229-256 [M. Clapham/J. Karr/M. Clapham] |
Secondary references:
| 48946 | O. F. Gallego, R. G. Martins-Neto, and S. N. Nielsen. 2005. Conchostracans and insects from the Upper Triassic of the Biobío river ("Santa Juana Formation"), south-central Chile. Revista Geológica de Chile 22:293-311 [M. Clapham/M. Clapham/M. Clapham] |