Ch-6b. Quebrada Chalala, Purmamarca (Ordovician of Argentina)

Where: Argentina (23.7° S, 65.5° W: paleocoordinates 44.5° S, 128.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Notopeltis orthometopa trilobite zone, upper Member (Coquena Formation), Tremadoc (485.4 - 477.7 Ma)

• Notopeltis orthometopa zone = A. murrayi + Hunnegraptus copiosus graptolite zones, and P. proteus + A. detlodus condont zones; levels CH 5, 6a, 6b, 7

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified mudstone

• The interbedded shell beds may represent distal storm deposits.
• gray bioturbated mudstones with some interbedded shell beds

Size class: macrofossils

Primary reference: J. L. Benedetto and P. A. Carrasco. 2002. Tremadoc (earliest Ordovician) brachiopods from Purmamarca and the Sierra de Mojotoro, Cordillera Oriental of northwestern Argentina. GĂ©obios 35:647-661 [W. Kiessling/U. Merkel/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 159270: authorized by Pete Wagner, entered by Pete Wagner on 30.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Orthida - Nanorthidae
"Nanorthis brachymyaria n. sp." = Lampazarorthis brachymyaria
"Nanorthis brachymyaria n. sp." = Lampazarorthis brachymyaria Benedetto and Carrasco 2002
 Orthida - Plectorthidae
Lipanorthis andinus Benedetto and Carrasco 2002