Upper Belen Fmn., Phacopina aspera bed, La Paz Province, Bolivia (Devonian of Bolivia)

Also known as Lager der Ph. aspera

Where: La Paz, Bolivia (15.5° S, 68.0° W: paleocoordinates 63.8° S, 83.5° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Upper Belen Member (Belen Formation), Emsian (407.6 - 393.3 Ma)

• Age call is based on Isaacson and Sablock (1987) (PBDB ref. 9680). Nested within Ph. aspera bed is the Metacryphaeus cornutus bed.

• member-level stratigraphic resolution

Environment/lithology: marine; sandstone and shale

• Facies complex is described, including sandstones, shales, and siltstones.

Primary reference: R. Wolfart. 1968. Die Trilobiten aus dem Devon Boliviens und ihre Bedeutung fuer Stratigraphie und Tiergeographie. Beihefte zum Geologischen Jahrbuch 74:5-201 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37055: authorized by Michael Foote, entered by Michael Foote on 26.02.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Focus of monograph is trilobites. Other taxa sometimes mentioned as well.
 Phacopida - Acastidae
 Phacopida - Calmoniidae
Metacryphaeus cornutus n. sp. trilobite
Metacryphaeus sp. Reed 1907 trilobite
Metacryphaeus venustus n. sp. trilobite
Calmonia curvioculata n. sp. trilobite
Phacopina (Vogesina) aspera n. sp. trilobite
 Phacopida - Phacopidae
Phacops salteri trilobite
 Proetida - Aulacopleuridae
 Lichida - Lichidae
Acanthopyge balliviani Kozlowski 1923 trilobite
 Orthocerida -
Crinoidea indet. Miller 1821 Sea lily
Brachiopoda indet. Cuvier 1805
 Conulariida -
Conulariida indet. Miller and Gurley 1896 jellyfish