USGS 3137. Chacorillo farm, ~6 km north of Kilometer 65 of Potosi-Sucre Rd (Ordovician to of Bolivia)

Where: General de Saavedra, Bolivia (19.5° S, 65.3° W: paleocoordinates 43.9° S, 129.5° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Anzaldo Formation, Caradoc to Caradoc (460.9 - 445.2 Ma)

• Unnamed formation. Egenhoff et al. (2007) indicate that this is the Anzaldo formation and of late Caradoc age.

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, concretionary sandstone

• rusty weathering brown sandstone and concretions.

•Boucot: The specimens are preserved as casts and molds in rusty weathering, brown sandstone.

Size class: macrofossils

Preservation: cast

Reposited in the USNM

• JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: L. Branisa. 1965. Los fosiles guias de Bolivia: I. Paleozoico. Boletin de Servicio Geologico de Bolivia. La Paz, Bolivia 6:1-282 [A. Miller/P. Novack-Gottshall/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 9102: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 22.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Several bivalves are probably incorrectly identified. These include: Parallelodon, Modiomorpha, and Grammysia, all of which are of much younger age
Gastropoda
 Bellerophontida - Pterothecidae
Gyrospira tourteloti n. gen. n. sp.
Gyrospira tourteloti n. gen. n. sp. Boucot 1956 snail
Bivalvia
 Arcida - Parallelodontidae
? Parallelodon sp. Meek and Worthen 1866 clam
 Ostreida - Pterineidae
"Pterinea" sp. Goldfuss 1832 oyster
 Modiomorphida - Modiomorphidae
? Modiomorpha sp. Hall and Whitfield 1869 clam
 Cardiidia - Grammysiidae
? Grammysia sp. de Verneuil 1847 clam
 Heteroconchia - Lipanellidae
"Goniophorina" sp. Isberg 1934 clam
 Solemyida - Ctenodontidae
"Ctenodonta" sp. Salter 1852 clam
Trilobita
 Phacopida - Homalonotidae