LAS-B., Las Aguaditas South Section, ~7¼ km west and ~9¼ km south of San José da Jáchal (Ordovician of Argentina)

Where: San Juan, Argentina (30.3° S, 68.8° W: paleocoordinates 34.5° S, 133.4° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Nemagraptus gracilis graptolite zone, Las Aguaditas Formation, Sandbian (458.4 - 453.0 Ma)

• ?Nemagraptus gracilis zone. Top Breccia "member."

• bed-level stratigraphic resolution

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

• marlstones in slumps (Fig. 2).

Size class: macrofossils

Primary reference: G. D. Edgecombe, B.D.E. Chatterton, N.E. Vaccari and B.G. Waisfeld. 1997. Ontogeny of the proetid trilobite Stenoblepharum, and relationships of a new species from the Upper Ordovician of Argentina. Journal of Paleontology 71(3):419-433 [A. Miller/P. Novack-Gottshall/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73388: authorized by Pete Wagner, entered by Pete Wagner on 13.06.2007, edited by Sarah Kolbe and Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Proetida - Dimeropygidae
"Paratoernquistia sanchezae" = Toernquistia sanchezae1
"Paratoernquistia sanchezae" = Toernquistia sanchezae1 Chatterton et al. 1998 trilobite
 Proetida - Tropidocoryphidae
Stenoblepharum astinil Edgecombe et al. 1997 trilobite
 Olenida - Olenidae
Triarthrus jachalensis4 Harrington and Leanza 1957 trilobite
 Phacopida - Pliomeridae
Pliomerina peripata n. sp.3 trilobite
 Phacopida - Cheiruridae
Ceraurinella zhoui5 Edgecombe et al. 1999 trilobite
Heliomeroides evitti5 Baldis and Pothe 1995 trilobite
 Phacopida - Calymenidae
Platycalymene trapezoidalis2 Baldis and Pothe 1995 trilobite