Where: Argentina (37.7° S, 70.2° W: paleocoordinates 36.8° S, 33.3° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Agrio Formation, Late/Upper Valanginian (140.2 - 136.4 Ma)
• third lowest level at this locality, distance between fossiliferous horizons unknown
• bed-level stratigraphic resolution
Environment/lithology: marine; calcareous shale and shelly/skeletal, calcareous packstone
Size class: macrofossils
Primary reference: M. B. Aguirre-Urreta and P. F. Rawson. 1999. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Research 20:343-357 [J. Alroy/E. Leckey/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 37781: authorized by John Alroy, entered by Erin Leckey on 23.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Olcostephanus (Viluceras) permolestus Leanza 1958 ammonite |