ammonites
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, 132.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Top Breccia Member (Las Aguaditas Formation), Costonian (460.9 - 457.5 Ma)

• ?Nemagraptus gracilis zone

• 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

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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Proetida - Tropidocoryphidae
Stenoblepharum astinil Edgecombe et al. 1997
Trilobita - Proetida - Dimeropygidae
Paratoernquistia sanchezae Chatterton et al. 1998
Chatterton et al. 1998
recombined as Toernquistia sanchezae
Trilobita - Phacopida - Cheiruridae
Ceraurinella zhoui Edgecombe et al. 1999
Edgecombe et al. 1999
Heliomeroides evitti Baldis and Pothe 1995
Edgecombe et al. 1999
Trilobita - Phacopida - Pliomeridae
Pliomerina peripata
Edgecombe et al. 1999
see common names

Geography
Country:Argentina State/province:San Juan
Coordinates: 30.3° South, 68.8° West (view map)
Paleocoordinates:34.5° South, 132.8° West
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:early Late Ordovician 10 m.y. bin:Ordovician 4
Key time interval:Costonian
Age range of interval:460.9 - 457.5 m.y. ago
Stratigraphy
Formation:Las Aguaditas Member:Top Breccia
Local section:Las Aguaditas South Local bed:210 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: ?Nemagraptus gracilis zone
Lithology and environment
Primary lithology: lithified marl
Secondary lithology: claystone
Lithology description: marlstones in slumps (Fig. 2).
Environment:deep subtidal shelf
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:taxonomic analysis
Metadata
Database number:73388
Authorizer:P. Wagner, A. Miller Enterer:P. Wagner, S. Kolbe
Modifier:S. Kolbe Research group:marine invertebrate
Subset of collection #:8776
Created:2007-06-13 20:42:52 Last modified:2011-08-26 13:08:00
Access level:the public Released:2007-06-13 20:42:52
Creative Commons license:
Reference information
Primary reference:
633 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]

Secondary references:

24624 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]
37237 G. D. Edgecombe, B. D. E. Chatterton, B. G. Waisfield and N. E. Vaccari. 1999. Ordovician pliomerid and prosopiscid trilobites from Argentina. Journal of Paleontology 73(6):1144-1154 [A. Miller/S. Kolbe]
37329 G. D. Edgecombe, B. D. E. Chatterton, N.E. Vaccari and B.G. Waisfield. 1999. Ordovician cheirurid trilobites from the Argentine Precordillera. Journal of Paleontology 73(6):1155-1175 [A. Miller/S. Kolbe]