J.Hum-6 (A8) Rio Iturbe: Tremadoc, Argentina
collected by J.J. Zunino and E. Mauri

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Olenida - Olenidae
Triarthrus tetragonalis (Harrington 1938)
Monti 2018
Trilobita - Asaphida - Asaphidae
Trilobita - Asaphida - Remopleurididae
Trilobita - Ptychopariida - Shumardiidae
Agnostida
Agnostida - Metagnostidae
Geragnostus sp. Howell 1935
see common names

Geography
Country:Argentina State/province:Jujuy County:Humahuaca
Coordinates: 23.0° South, 65.4° West (view map)
Paleocoordinates:31.5° South, 162.1° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Ordovician Epoch: Early Ordovician
Stage: Tremadocian 10 m.y. bin: Ordovician 1
*Period:Early/Lower Ordovician *Epoch:Early/Lower Arenig
*International age/stage:Early/Lower Arenig
Key time interval: Tremadoc Trilobite zone:  Bienvillia tetragonalis - Conophrys minutula
Age range of interval: 486.4 - 477.1 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Azul Pampa
Stratigraphic resolution:formation
Stratigraphy comments: Bienvillia tetragonalis - Conophrys minutula zone at Rio Iturbe is Azul Pampa formation.
Lithology and environment
Primary lithology:gray,green lithified "shale"
Includes fossils?Y
Environment:offshore
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:J.J. Zunino and E. Mauri
Taxonomic list comments:Primarily trilobite taxonomy and biostratigraphy
Metadata
Database number:9087
Authorizer:A. Miller, M. Hopkins Enterer:P. Novack-Gottshall, S. Kolbe, M. Hopkins
Modifier:P. Wagner Research group:marine invertebrate
Created:2000-09-22 11:55:45 Last modified:2025-04-01 14:39:59
Access level:the public Released:2000-09-22 11:55:45
Creative Commons license:CC0
Reference information

Primary reference:
642. H. J. Harrington and A. F. Leanza. 1957. Ordovician trilobites of Argentina. Department of Geology, University of Kansas Special Publication 1:1-276 [A. Miller/P. Novack-Gottshall/M. Uhen]

Secondary references:

71890 D. S. Monti. 2018. Morphometrics of Leptoplastides marianus (Hoek) (Trilobita, Olenidae) from the Tremadocian of north-western Argentina: taxonomic implications. Journal of Systematic Palaeontology 16(3):179-197 [M. Hopkins/M. Hopkins]