Las Plantas Fm., Quebrada las Plantas, Vallecito, and Gualcamayo, Argentina (Ordovician to of Argentina)

Where: Argentina (30.0° S, 69.0° W: paleocoordinates 34.7° S, 132.8° W)

• local area-level geographic resolution

When: Las Plantas Formation, Costonian to Costonian (460.9 - 455.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, concretionary, black, gray, calcareous lime mudstone and wackestone

• light gray, internally dark gray and black calcareous concretions within mudstone, wackestone, and calcitic shale

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: T. M. Sanchez. 1990. Una fauna de bivalvos en la Formacion Santa Gertrudis (Ordovicico) de la Provincia de Salta (Argentina). Ameghiniana 23(3-4):131-139 [A. Miller/P. Novack-Gottshall/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8889: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847 clam
 Cardiidia - Grammysiidae
Strophomenata
 Orthotetida - Triplesiidae
Bicuspina sp. Havlicek 1950
 Strophomenida - Sowerbyellidae
Sowerbyella sp. Jones 1928
 Strophomenida - Leptellinidae
Anchoramena sp. Benedetto 1995
 Strophomenida - Glyptomenidae
Bystromena sp. Williams 1974
Rhynchonellata
 Orthida - Plaesiomyidae
Campylorthis sp. Ulrich and Copper 1942
Dinorthis sp. Hall and Clarke 1892
 Orthida - Heterorthidae
 Orthida - Draboviidae
Oanduporella sp. Hints 1975
 Pentamerida - Camerellidae
Camerella sp. Billings 1859
Trilobita
 Lichida - Lichidae
Amphilichas sp. Raymond 1905 trilobite
 Trinucleida - Trinucleidae
Guandacolithus sp. Harrington and Leanza 1957 trilobite
 Asaphida - Asaphidae
Pseudobasilicus sp. Reed 1930 trilobite
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844 trilobite
Pterobranchia
 Graptoloidea - Diplograptidae
Orthograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Climacograptidae
Climacograptus sp. Hall 1865 climacograptid
 Graptoloidea - Dicranograptidae
Nemagraptus sp. graptolite
Dicellograptus sp. Hopkinson 1871 graptolite
Dicranograptus sp. Hall 1865 graptolite
 Life - Oepikinidae
Oepikoides sp. Benedetto 1995