Unnamed fm., Agua Negra, Argentina (Ordovician of Argentina)

Where: Argentina (31.0° S, 69.0° W: paleocoordinates 36.0° S, 130.8° W)

• local area-level geographic resolution

When: Arenig (478.6 - 466.0 Ma)

• Unnamed fm.; Annamitella tellecheai biozone

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, gray limestone and dolomite

• light gray, massive limestone and dolomite

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: A. V. Borrello. 1961. El genero Westonoceras entre los cefalopodos Ordovicicos de la Precordillera de San Juan. Notas del Museo de Universidad Nacional de la Plata, Geologia 20(72):1-11 [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9038: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 19.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Cephalopod from Borrello, 1961; trilobites from Harrington and Leanza, 1957
Show authors, comments, and common names
Cephalopoda
 Discosorida - Westonoceratidae
Westonoceras sp.
Westonoceras sp. Foerste 1924
Gastropoda
 Euomphalina - Macluritidae
Maclurites sp.
Maclurites sp. Le Sueur 1818 snail
Trilobita
 Corynexochida - Leiostegiidae
Annamitella tellecheai
Annamitella tellecheai Rusconi 1951 trilobite
 Corynexochida - Illaenidae
Illaenus sp., Nanillaenus sp.
Illaenus sp. Dalman 1827 trilobite
Nanillaenus sp. Jaanusson 1954 trilobite