Chacaico Sur, Los Molles: Early/Lower Bajocian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Thalattosuchia indet.
(Fraas 1901)
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Gasparini and Fernández 2005 | |||||||||
| Single caudal vertebra | ||||||||||
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Reptilia
- Plesiosauria
- Rhomaleosauridae
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Maresaurus coccai n. gen., n. sp.
Gasparini 1997
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Gasparini 1997 | 1 individual | ||||||||
| MOZ P 4386, skull, mandible, atlas-axis complex and the anteriormost cervical vertebrae | ||||||||||
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Reptilia
- Ophthalmosauridae
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Mollesaurus periallus
Fernandez 1999
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1 individual | |||||||||
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Cephalopoda
- Ammonitida
- Sonniniidae
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Sonninia espinazitensi
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Sonninia (Papilliceras) espinazitensis
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| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Neuquen |
| Coordinates: | 39.3° South, 70.3° West (view map) | ||
| Paleocoordinates: | 36.9° South, 31.1° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Bajocian | 10 m.y. bin: | Jurassic 4 |
| Key time interval: | Early/Lower Bajocian | Ammonoid zone: | Emileia giebeli |
| Age range of interval: | 170.90000 - 168.60000 m.y. ago |
Stratigraphy
| Geological group: | Cuyo | Formation: | Los Molles |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | marl |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "dark shales and marls" (Gasparini 1997) | |
| Environment: | offshore |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Abundance in sediment: | rare |
| Fragmentation: | frequent |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection size: | 1 individuals |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: MOZ, Museo Olsacher, Zapala, Neuquén, Argentina | |
Metadata
| Database number: | 102280 | ||
| Authorizer: | M. Carrano, J. Alroy, P. Mannion | Enterer: | H. Street, J. Alroy, J. Tennant |
| Modifier: | F. Aspromonte | Research group: | vertebrate |
| Created: | 2011-01-12 08:41:34 | Last modified: | 2023-11-10 14:55:19 |
| Access level: | the public | Released: | 2011-01-12 08:41:34 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 34742. | M. S. Fernandez. 1999. A new ichthyosaur from the Los Molles Formation (Early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology 73(4):677-681 [M. Carrano/H. Street] |
Secondary references:
| 35537 | Z. Gasparini. 1997. A new pliosaur from the Bajocian of the Neuquen Basin, Argentina. Palaeontology 40(1):135-147 [J. Alroy/J. Alroy] | |
| 45364 | Z. Gasparini and M. Fernández. 2005. Jurassic marine reptiles of the Neuquen Basin: records, faunas, and their palaeobiogeographic significance. In G. D. Viega, L. A. Spalletti, J. A. Howell, E. Schwarz (eds.), The Neuquen Basin, Argentina: A Case Study in Sequence Stratigraphy and Basin Dynamics; Geological Society, London, Special Publications 252:279-294 [P. Mannion/J. Tennant/F. Aspromonte] | |
| 86420 | J. P. O'Gorman. 2016. Argentinean plesiosaurs: a commented account of main records, systematic and biogeographical patterns and comments on future perspectives. In F. L. Agnolín, G. L. Lio, F. Brissón Egli, N. R. Chimento, F. E. Novas (eds.), Historia Evolutiva y paleobiogeográfica de los vertebrados de América del Sur (6)37-45 [E. Vlachos/F. Aspromonte] |