Gualcamayo Fm., Quebrada Potrerillos, Argentina (Ordovician of Argentina)

Where: Argentina (30.0° S, 69.0° W: paleocoordinates 35.3° S, 131.9° W)

• local area-level geographic resolution

When: Gualcamayo Formation, Llanvirn (468.0 - 458.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: submarine fan; lithified, gray shale

• Slope sediments
• dark gray shales

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: W. Volkheimer, A.J. Cuerda, and D.L. Melendi. 1980. Quitinozoos Ordovicicos de la Formacion Gualcamayo en su localidad tipo al suroeste de Guandacol, Precordillera de La Rioja, Republica Argentina. Actas del segundo congreso Argentino de paleontologia y bioestratigrafia y primer congreso Latinoamericano de paleontologia 1:23-35 [A. Miller/P. Novack-Gottshall/O. Alfaro]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8888: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
  -
Cyathochitina sp., Lagenochitina sp., Desmochitina sp., Rhabdochitina sp.
Pterobranchia
 Graptoloidea - Dichograptidae
Zygograptus sp., Loganograptus sp.
Zygograptus sp. graptolite
Loganograptus sp. Hall 1868 graptolite
 Graptoloidea - Isograptidae
Isograptus sp.
Isograptus sp. Moberg 1892 graptolite
 Graptoloidea - Glossograptidae
Paraglossograptus sp.
 Graptoloidea - Retiolitidae
Glyptograptus sp.
  -
Trigonograptus sp.
Trigonograptus sp. Lapworth 1873 graptolite
Chitinozoa
 Prosamatifera - Conochitinidae
Conochitina sp.
Conochitina sp. Eisenack 1931