LA 0-10 cm, Las Aguaditas North Section, ~5.5 km west and ~9.5 km south of San José da Jáchal (Ordovician of Argentina)

Where: San Juan, Argentina (30.3° S, 68.8° W: paleocoordinates 34.9° S, 132.3° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Nemagraptus gracilis graptolite zone, Las Aguaditas Formation, Late/Upper Llanvirn (463.5 - 460.9 Ma)

• Nemagraptus gracilis zone, late Llanvirn

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified marl and claystone

• marlstones in slumps (Fig. 2).

Size class: macrofossils

Primary reference: B.D.E. Chatterton, G. D. Edgecombe, B.G. Waisfeld and N.E. Vaccari. 1998. Ontogeny and systematics of Toernquistiidae (Trilobita, Proetida) from the Ordovician of the Argentine Precordillera. Journal of Paleontology 72(2):273-303 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73371: authorized by Pete Wagner, entered by Pete Wagner on 13.06.2007, edited by Sarah Kolbe

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Proetida - Dimeropygidae
Chomatopyge canasi
Chomatopyge canasi Chatterton et al. 1998 trilobite
 Ptychopariida - Shumardiidae
Changchowilla sanjuanina2
 Phacopida - Cheiruridae
Macrogrammus rafi1
Macrogrammus rafi1 Edgecombe et al. 1999 trilobite
1Edgecombe et al. 1999; 2Waisfeld et al. 2001