Roca Negra: Burdigalian, Peru
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cetacea
- Inticetidae
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Inticetus vertizi n. gen., n. sp.
Lambert et al. 2017
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1 specimen | |||||||||
| MUSM 1980 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Peru |
| Coordinates: | 14.7° South, 75.6° West (view map) |
| Paleocoordinates: | 15.6° South, 71.5° West |
| Altitude: | 383 meters |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Burdigalian | ||
| Age range of interval: | 20.44000 - 15.98000 m.y. ago |
Stratigraphy
| Formation: | Chilcatay | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The holotype of Inticetus vertizi MUSM 1980 was discovered in layers of the Chilcatay Formation, the latter being dated based on diatoms, foraminifers and molluscs from the latest Oligocene–earliest Middle Miocene (Machar e et al. 1988; Dunbar et al. 1990; DeVries 1998, 2001). The stratigraphical section of the Roca Negra outcrop is dominated by fine and medium sandstones with minor amounts of silt and two 0.2 m-thick volcanic ash layers (Fig. 2). By combining data from silicoflagellates (Naviculopsis ponticula zone of Bukry 1981) found in a sample located about 5.5 m above MUSM 1980, diatoms from beds containing N. ponticula spinosa in another section of the Chilcatay Formation in the Pisco Basin (Pampa Chilcatay; Machar e et al. 1998), and the 40Ar/39Ar dating of an ash layer just below the erosional contact of the Chilcatay Formation with the Pisco Formation (Di Celma et al. 2017), a time interval between 18.8 and 18.0 Ma can be provided, corresponding to the late early Burdigalian (late Early Miocene). | |||||
Lithology and environment
| Primary lithology: | fine,medium silty sandstone |
| Includes fossils? | Y |
| Lithology description: fine and medium sandstones with minor amounts of silt and two 0.2 m-thick volcanic ash layers | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Feeding/predation traces: | tooth marks |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 188749 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2017-09-15 14:47:39 | Last modified: | 2020-07-22 15:29:08 |
| Access level: | the public | Released: | 2017-09-15 14:47:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 63363. | O. Lambert, C. de Muizon, E. Malinverno, C. Di Celma, M. Urbina and G. Bianucci. 2017. A new odontocete (toothed cetacean) from the Early Miocene of Peru expands the morphological disparity of extinct heterodont dolphins. Journal of Systematic Palaeontology [M. Uhen/M. Uhen] |
Secondary references:
| 73128 | G. Bosio, E. Malinverno, A. Collareta, C. Di Celma, A. Gioncada, M. Parente, F. Berra, F. G. Marxf, A. Vertino, M. Urbina, and G. Bianucci. 2020. Strontium Isotope Stratigraphy and the thermophilic fossil fauna from the middle Miocene of the East Pisco Basin (Peru). Journal of South American Earth Sciences 97 [M. Uhen/M. Uhen] |