Sella, Bed 4 (Ordovician of Bolivia)

Where: Tarija, Bolivia (21.4° S, 64.6° W: paleocoordinates 45.1° S, 129.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Upper Member (Sella Formation), Arenig (478.6 - 466.0 Ma)

• middle Arenig (Baltographus deflexus / Baltograptus minutus zones)

• bed-level stratigraphic resolution

Environment/lithology: sandstone

• The upper member is composed of amalgamated quartzitic sandstone beds displaying low-angle cross stratificaiton and abundant Cruziana

Size class: macrofossils

Collection methods: Beds 2 & 3 are 100 and 175 m up section, and have the identical fauna & lithology.

Primary reference: T. M. Sánchez and C. Babin. 2005. Lower Ordovician bivalves from southern Bolivia: paleobiogeographic affinities. Ameghiniana 42(3):559-566 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 57173: authorized by Pete Wagner, entered by Pete Wagner on 07.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Palaeotaxodonta - Tironuculidae
Natasia boliviensis Babin and Branisa 1987 clam
 Arcida - Glyptarcidae
 Modiomorphida - Modiomorphidae
Redonia riojana Sanchez 1997 clam
 Cardioni - Coxiconchiidae
Coxiconchia sellaensis Sánchez and Babin 2005 clam