El Mamon 1: Late Miocene, Venezuela

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri - Siluriformes - Pimelodidae
MCN-USB OL-2142 (holotype); UNEFM-PF-0363 (paratype); UNEFM-PF-0264, UNEFM-PF-0356 (non-types) (9 measurements)
see common names

Geography
Country:Venezuela State/province:Falcon
Coordinates: 11.3° North, 70.2° West (view map)
Paleocoordinates:11.6° North, 67.6° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 6
Key time interval: Late Miocene
Age range of interval: 11.63 - 5.333 m.y. ago
Stratigraphy
Formation:Urumaco Member:Middle
Stratigraphy comments: The geological units from which the specimens were obtained are the middle and upper members of the Urumaco Formation of Venezuela. These units have been recently summarized in the Léxico estratigráfico de Venezuela (1997).
Lithology and environment
Primary lithology:brown,gray claystone
Secondary lithology: sandstone
Includes fossils?Y
Lithology description: The middle member of the Urumaco Formation consists of claystone and sand. The gray claystone is microfossiliferous, and the brown claystone contains vertebrate remains such as reptiles, mammals, marine and freshwater fish, and also coprolites and wood (Díaz de Gamero & Linares, 1989). The limestone changes from conchiferous sandstones to consolidated coquina limestone. In the lower half of this middle member, an abundant and diverse marine mollusk fauna exists in a sandy matrix. This matrix also contains elasmobranch teeth and teleostean otoliths.
Environment:fluvial-deltaic indet.
Geology comments: The paleoenvironments are interpreted as inner sub-littoral and coastal lagoon enviroments with riverine and estuarine influence (Díaz de Gamero, 1996).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Also known as:Urumaco (Middle member)
Database number:136767
Authorizer:C. Jaramillo Enterer:G. Ballen
Created:2012-12-04 10:22:11 Last modified:2025-02-22 15:12:02
Access level:group members Released:2015-12-04 10:22:11
Creative Commons license:CC0
Reference information

Primary reference:
43734. J. G. Lundberg and O. A. Aguilera. 2003. The late Miocene Phractocephalus catfish (Siluriformes: Pimelodidae) from Urumaco, Venezuela: additional specimens and reinterpretation as a distinct species. Neotropical Ichthyology 1(2):97-109 [C. Jaramillo/G. Ballen]