Where: San Juan, Argentina (31.3° S, 68.6° W: paleocoordinates 34.4° S, 133.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Eoplacognathus suecicus conodont zone, Ahtiella Biozone Member (San Juan Formation), Llanvirn (468.0 - 458.4 Ma)
• STRATIGRAPHIC POSITION: From the upper part of the formation (Shaly Limestone Member). PJW: The Ahtiella zone is now the Gualcamayo formation.
• group of beds-level stratigraphic resolution
Environment/lithology: open shallow subtidal; lithified limestone
Size class: macrofossils
Primary reference: M. G. Carrera. 2000. Epizoan-sponge Interactions in the Early Ordovician of the Argentine Precordillera. Palaios 15:261-272 [A. Hendy/A. Hendy]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 90430: authorized by Austin Hendy, entered by Austin Hendy on 20.07.2009, edited by Uta Merkel
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
|
Pelmatozoa indet. Leuckart 1848
Annelida indet. Lamarck 1809 | |
| Brachiopoda | |
|
Brachiopoda indet. Cuvier 1805 | |
| Bryozoa | |
|
Bryozoa indet. bryozoan | |
| unclassified | |
|
Porifera indet. Grant 1836 | |
| Demospongiae | |
|
Hudsonospongia cyclostoma Raymond and Okulitch 1940 demosponge
Aulocopium sanjuanensis Beresi and Rigby 1993 demosponge | |
Calycocoelia sp., Calycocoelia perforata n. sp., Psarodictyum sp., Psarodictyum magna n. sp., Archaeoscyphia pulchra, Archaeoscyphia minganensis, Rhopalocoelia regularis, Rhopalocoelia tenuis, Rhopalocoelia clarkii, Patellispongia sp., Patellispongia robusta
Calycocoelia sp. Bassler 1927 demosponge
Calycocoelia perforata n. sp. Beresi and Rigby 1993 demosponge
Psarodictyum sp. Raymond and Okulitch 1940 demosponge
Psarodictyum magna n. sp. Beresi and Rigby 1993 demosponge
Archaeoscyphia pulchra Bassler 1927 demosponge
Archaeoscyphia minganensis Billings 1859 demosponge
Rhopalocoelia regularis demosponge
Rhopalocoelia tenuis demosponge
Rhopalocoelia clarkii Raymond and Okulitch 1940 demosponge
Patellispongia sp. Bassler 1927 demosponge
Patellispongia robusta Beresi and Rigby 1993 demosponge | |