Cementos Andinos quarry (28 m above base): Cenomanian, Venezuela
collected by J.D. Carrillo-Briceño 2013-2016
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Lunaophis aquaticus n. gen., n. sp.
Albino et al. 2016
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| MNCN-1827 - holotype (vertebrae) | ||||||||||
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Actinopteri
- Aulopiformes
- Enchodontidae
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Enchodontidae indet.
Woodward 1901
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Actinopteri
- Ichthyodectiformes
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Ichthyodectiformes indet.
Bardack and Sprinkle 1969
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Actinopteri
- Ichthyodectiformes
- Ichthyodectidae
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Xiphactinus audax
(Leidy 1870)
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| Isolated and semi-articulated cranial and postcranial elements | ||||||||||
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Chondrichthyes
- Lamniformes
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Lamniformes indet.
Berg 1958
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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| see common names | ||||||||||
Geography
| Country: | Venezuela | State/province: | Trujillo |
| Coordinates: | 9.6° North, 70.4° West (view map) | ||
| Paleocoordinates: | 1.5° North, 46.1° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | black "shale" |
| Includes fossils? | Y |
| Lithology description: Black shale layer | |
| Environment: | offshore indet. |
| Geology comments: Marine environment where laminated organic rich intervals suggest a deposition on the mid-shelf to upper continental slope under anoxic or poorly oxygenated conditions. Gonzalez de Juana et al. (1980) suggested that the La Aguada Member could be considered as a transitional environment between the shallow waters of the Maraca formation (or La Puya Member according to Renz, 1959, 1968) and the pelagic facies of the La Luna Formation. Erlich et al. (1999) and Mendez (1981) suggested that the anoxic conditions of the La Luna Formation during the late Albian-early Cenomanian transgression were not due to water depth but to pre-existing anoxic conditions in the slope zone. On basis of benthic and planktonic foraminifera, Mendez (1981) recognized an increase in the submersion of the platform, but probably with depths that did not exceed 50 m. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | J.D. Carrillo-Briceño | Collection dates: | 2013-2016 |
| Collection method comments: Repository: Alcaldía Bolivariana de Urumaco, Venezuela (AMU-CURS) | |||
Metadata
| Database number: | 176561 | ||
| Authorizer: | P. Coster, P. Mannion | Enterer: | P. Coster, P. Mannion |
| Modifier: | M. Clapham | Research group: | vertebrate |
| Created: | 2016-02-17 17:13:34 | Last modified: | 2020-09-06 22:49:34 |
| Access level: | the public | Released: | 2016-02-17 17:13:34 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 59241. | A. Albino, J. D. Carrillo-Briceño, and J. M. Neenan. 2016. An enigmatic aquatic snake from the Cenomanian of northern South America. PeerJ 4:e2027:1-26 [P. Mannion/P. Mannion/M. Carrano] |