Cerro Viejo [upper San Juan Fm]: Llanvirn, Argentina
collected by Carrera

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Allosacus sp.
4 specimens
Demospongiae - Streptosclerophorida - Hindiidae
Eoscheiella concava n. gen., n. sp. Carrera 2007
Carrera 2007
Demospongiae - Megalithistida - Saccospongiidae
Rugospongia viejoensis n. gen., n. sp. Carrera 1996
Carrera 1996 1 specimen
Demospongiae - Anthaspidellidae
Psarodictyum sp. Raymond and Okulitch 1940
1 specimen
Protachilleum kayseri Zittel 1877
1 specimen
Archaeoscyphia tenuis n. sp. Carrera 1994
Carrera 1994 8 specimens
Archaeoscyphia minganensis (Billings 1859)
4 specimens
Archaeoscyphia pulchra (Bassler 1927)
12 specimens
Rhopalocoelia tenuis
1 specimen
Calycocoelia sp. Bassler 1927
1 specimen
Demospongiae - Streptosolenidae
Aulocopium sp. Oswald 1847
1 specimen
Hudsonospongia cyclostoma Raymond and Okulitch 1940
10 specimens
Hudsonospongia porosa Raymond and Okulitch 1940
1 specimen
Hudsonospongia irregularis Raymond and Okulitch 1940
3 specimens
unclassified
Pelmatozoa indet. Leuckart 1848
155 specimens
Bryozoa
Bryozoa indet. (Ehrenberg 1831)
8 specimens
Stenolaemata - Trepostomata
Trepostomata indet. Ulrich 1882
unclassified
Brachiopoda indet. Cuvier 1805
9 specimens
Annelida indet. Lamarck 1809
14 specimens
see common names

Geography
Country:Argentina
Coordinates: 30.5° South, 68.5° West (view map)
Paleocoordinates:35.1° South, 132.7° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Middle Ordovician
10 m.y. bin:Ordovician 2-3
Key time interval:Llanvirn Conodont zone: Eoplacognathus suecicus
Age range of interval:468.40000 - 458.40000 m.y. ago
Stratigraphy
Formation:San Juan Member:Ahtiella Biozone
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the San Juan Fm, for which lithostratigraphic relationships are not discussed. AGE: Whiterockian. STRATIGRAPHIC POSITION: From the upper part of the formation.
Lithology and environment
Primary lithology:nodular lithified "limestone"
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Nodular limestone. LITHIFICATION: Lithified, on the basis of figured specimens and facies description.
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Encrustation:frequent
Spatial resolution:autochthonous
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,field collection
Reason for describing collection:paleoecologic analysis
Collectors:Carrera
Collection method comments: COLLECTOR: Carrera, presumably in the early 1990's. REPOSITORY: Catedra de Estratigrafıa y Geologıa Historica, University of Cordoba.
Taxonomic list comments:COVERAGE: Limited to sponges and associated epibionts. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identification where possible.
Metadata
Database number:90432
Authorizer:A. Hendy, W. Kiessling Enterer:A. Hendy, U. Merkel
Modifier:P. Wagner Research group:marine invertebrate
Created:2009-07-20 07:56:52 Last modified:2019-09-26 19:45:33
Access level:the public Released:2009-07-20 07:56:52
Creative Commons license:CC BY
Reference information

Primary reference:
30384. M. G. Carrera. 2000. Epizoan-sponge Interactions in the Early Ordovician of the Argentine Precordillera. Palaios 15:261-272 [A. Hendy/A. Hendy]

Secondary references:

629 M. G. Carrera. 1994. An Ordovician sponge fauna from the San Juan Formation, Precordillera Basin, western Argentina. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 191(2):201-220 [A. Miller/P. Novack-Gottshall/U. Merkel]
38343 M. G. Carrera. 1996. Ordovician megamorinid demosponges from San Juan Formation, Precordillera, western Argentina. Geobios 29(6):643-650 [W. Kiessling/U. Merkel]
38661 M. G. Carrera. 2007. The oldest hindiid demosponge from the Darriwilian (Middle Ordovician) of the Argentine Precordillera: evolutionary implications for the triclanocladines. Journal of Paleontology 81(4):754-759 [W. Kiessling/U. Merkel]