Duke Locality 75 (La Venta Fauna) (Miocene to of Colombia)

Also known as IGM locality 75

Where: Colombia (3.3° N, 75.2° W: paleocoordinates 2.8° N, 72.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Cerro Colorado Member (Villavieja Formation), Laventan to Laventan (13.8 - 10.0 Ma)

• Note: This collection had a Friasian age but this must be the Friasian sensu lato, that includes the Friasian sensu stricto, Mayoan and Laventan. The lower Villavieja formation (Baraya member) is considered of Laventan age now and the upper Villavieja formation is considered Laventan-Mayoan in age (Flynn et al., 1997).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; red, silty claystone and sandstone

• A change in sedimentation direction indicates that the Eastern Cordillera was already uplifted and was eroding to form the Cerro Colorado Member
• "prediminantly red claystone and siltstone. A few sandstone horizons 4-6 m thick composed of several stacked sandstone bodies, are present toward the top"

Size class: macrofossils

Collection methods: "numerous isolated scutes and miscellaneous postcranial bones"

Primary reference: A. A. Carlini, S. F. Vizcaino, and G. J. Scillato-Yane. 1997. Armored Xenarthrans: A unique taxonomic and ecologic assemblage. Vertebrate Paleontology in the Neotropics; The Miocene Fauna of La Venta, Colombia (R. F. Kay, R. H. Madden, R. L. Cifelli, and J. J. Flynn, eds.; Smithsonian Institution Press, Washington) [J. Alroy/J. Wertheim/L. Mora-Rojas]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13741: authorized by John Alroy, entered by Jill Wertheim on 23.04.2002, edited by Laura Mora-Rojas

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Sparassodonta - Thylacosmilidae
Anachlysictis gracilis n. gen. n. sp.1
Anachlysictis gracilis n. gen. n. sp.1 Goin 1997 metatherian
Specimen N° IGM 184247
 Rodentia -
Microscleromys sp.4 Walton 1990 caviomorph
IGM-DU 88-765
 Cingulata - Pachyarmatheriidae
Neoglyptatelus originalis Carlini et al. 1997 edentate
Reptilia
 Squamata -
Colombophis portai2 Hoffstetter and Rage 1977 snake
Specimen n° IGM 183988
Aves
 Opisthocomiformes - Opisthocomidae
Hoazinoides magdalenae3 Miller 1953 bird
Specimen n° 184249