Quebrada de Santa Gertrudis: Llanvirn, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Polycaulodus sp.
Trilobita - Phacopida - Homalonotidae
Brongniartella sp. Reed 1918
Calymenella sp. Bergeron 1890
Trilobita - Phacopida - Calymenidae
Synhomalonotus kobayashii Harrington and Leanza 1957
recombined as Neseuretus kobayashii
Trilobita - Asaphida - Asaphidae
Hoekaspis schlagintweiti Harrington and Leanza 1942
Parabasilicus sp. Kobayashi 1934
synonym of Basilicus
Bivalvia - Nuculanida - Malletiidae
Cadomia sp. Goarant de Tromelin 1877
Bivalvia - Cyrtodontida - Cyrtodontidae
Cyrtodontula sp. Tomlin 1931
Bivalvia - Arcida - Glyptarcidae
Zaplaella capillaensis Sánchez et al. 2003
Sánchez et al. 2003
Bivalvia - Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847
Bivalvia - Actinodontida - Cycloconchidae
Cycloconcha sp.
unclassified
Roundya sp.
Conodonta - Prioniodontida - Oistodontidae
Oistodus sp. Pander 1856
Conodonta - Prioniodontida - Balognathidae
Trapezognathus quadrangulum Lindström 1955
Carlorosi et al. 2018
Baltoniodus cooperi
Carlorosi et al. 2018
Baltoniodus triangularis
Carlorosi et al. 2018
Conodonta - Prioniodontida
Erraticodon patu Cooper 1981
Carlorosi et al. 2018
Ptiloconus sp. Sweet 1955
synonym of Erismodus
Conodonta - Ozarkodinida
Periodon aff. flabellum
Carlorosi et al. 2018
Conodonta - Proconodontida - Cordylodontidae
Cordylodus sp. Pander 1856
Conodonta - Panderodontida - Panderodontidae
Panderodus sp. Ethington 1959
Conodonta
Sagittodontus sp. Rhodes 1953
see common names

Geography
Country:Argentina
Coordinates: 25.0° South, 65.0° West (view map)
Paleocoordinates:40.2° South, 133.0° West
Geographic resolution:local area
Time
Period:Ordovician Epoch:Middle Ordovician
10 m.y. bin:Ordovician 2-3
*Period:Middle Ordovician *Epoch:Llanvirn
Key time interval:Llanvirn Conodont zone: Baltoniodus triangularis
Age range of interval:468.40000 - 458.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Santa Gertrudis
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:gray,green,yellow lithified sandy "shale"
Secondary lithology: "limestone"
Lithology description: green to yellow fine-grained sandstone limolites, and shale with thin-gray-blue limestone intercalations
Environment:shallow subtidal indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete
Metadata
Also known as:Santa Gertrudis Fm., Quebrada de Santa Gertrudis, Argentina
Database number:8893
Authorizer:A. Miller, P. Wagner Enterer:P. Novack-Gottshall, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2000-09-02 14:09:14 Last modified:2023-11-02 22:57:41
Access level:the public Released:2000-09-02 14:09:14
Creative Commons license:CC BY
Reference information

Primary reference:
667. 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]

Secondary references:

72745 J. Carlorosi, G. Sarmiento, and S. Heredia. 2018. Selected Middle Ordovician key conodont species from the Santa Gertrudis Formation (Salta, Argentina): an approach to its biostratigraphical significance. Geological Magazine 155(4):878-892 [P. Wagner/P. Wagner]
86266 T. M. Sánchez, L. Marengo, and R. A. Astini. 2003. Late Ordovician Bivalvia Heteroconchia (Cycloconchidae and Glyptarcidae) from western Argentina. Ameghiniana 40(3):433-440 [P. Wagner/P. Wagner]