LAa, Las Aguaditas North Section (Ordovician of Argentina)

Also known as ~5.5 km west and ~9.5 km south of San José da Jáchal

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: offshore ramp; mudstone and chert

• "distal ramp environment in the Llanvirn part of the Las Aguaditas Formation" Edgecombe et al 2005, p. 89.
• interbedded mudstone and chert

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 73374: 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

Show authors, comments, and common names
Trilobita
 Phacopida - Cheiruridae
Macrogrammus rafi3, Acanthoparyphinae indet.3
Macrogrammus rafi3 Edgecombe et al. 1999 trilobite
Acanthoparyphinae indet.3 Whittington and Evitt 1953 trilobite
 Phacopida - Prosopiscidae
Prosopiscus sp.1
Prosopiscus sp.1 Salter 1865 trilobite
 Olenida - Olenidae
Porterfieldia turneri2, Porterfieldia acava2
Porterfieldia turneri2 Baldis and Poethe 1995 trilobite
Porterfieldia acava2 Edgecombe et al. 2005 trilobite
 Proetida - Dimeropygidae
Chomatopyge canasi n. sp.
Chomatopyge canasi n. sp. Chatterton et al. 1998 trilobite
 Proetida - Scharyiidae
Lasarchopyge correae n. sp.
Lasarchopyge correae n. sp. Chatterton et al. 1998 trilobite
1Edgecombe et al. 1999; 2Edgecombe et al. 2005; 3Edgecombe et al. 1999