Don Braulio, Villicum Range: Llanvirn, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Porifera indet.
Grant 1836
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5 specimens | ||||||
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Demospongiae
- Anthaspidellidae
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Psarodictyum sp.
Raymond and Okulitch 1940
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11 specimens | ||||||
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Psarodictyum magna n. sp.
Beresi and Rigby 1993
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Beresi and Rigby 1993 | 1 specimen | |||||
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Archaeoscyphia minganensis
(Billings 1859)
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5 specimens | ||||||
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Archaeoscyphia pulchra
(Bassler 1927)
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7 specimens | ||||||
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Patellispongia sp.
Bassler 1927
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4 specimens | ||||||
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Patellispongia robusta
Beresi and Rigby 1993
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4 specimens | ||||||
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Rhopalocoelia regularis
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2 specimens | ||||||
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Rhopalocoelia tenuis
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1 specimen | ||||||
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Rhopalocoelia clarkii
Raymond and Okulitch 1940
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1 specimen | ||||||
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Calycocoelia sp.
Bassler 1927
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3 specimens | ||||||
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Calycocoelia perforata n. sp.
Beresi and Rigby 1993
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Beresi and Rigby 1993 | 2 specimens | |||||
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Demospongiae
- Streptosolenidae
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Aulocopium sanjuanensis
Beresi and Rigby 1993
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Beresi and Rigby 1993 | 1 specimen | |||||
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Hudsonospongia cyclostoma
Raymond and Okulitch 1940
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13 specimens | ||||||
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unclassified
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Pelmatozoa indet.
Leuckart 1848
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98 specimens | ||||||
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Bryozoa
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Bryozoa indet.
(Ehrenberg 1831)
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3 specimens | ||||||
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unclassified
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Brachiopoda indet.
Cuvier 1805
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22 specimens | ||||||
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Annelida indet.
Lamarck 1809
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54 specimens | ||||||
| see common names | |||||||
Geography
| Country: | Argentina | State/province: | San Juan |
| Coordinates: | 31.3° South, 68.6° West (view map) | ||
| Paleocoordinates: | 34.4° South, 133.2° West | ||
| Basis of coordinate: | stated in text | ||
| 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: | group of beds | ||||
| Stratigraphy comments: STRATIGRAPHIC POSITION: From the upper part of the formation (Shaly Limestone Member). PJW: The Ahtiella zone is now the Gualcamayo formation. | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: fine-grained limestones and lime mudstones | |
| Environment: | open shallow subtidal |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 90430 | ||
| Authorizer: | A. Hendy, W. Kiessling | Enterer: | A. Hendy, U. Merkel |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2009-07-20 07:54:10 | Last modified: | 2019-09-26 19:50:21 |
| Access level: | the public | Released: | 2009-07-20 07:54:10 |
| 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:
| 620 | M. S. Beresi and J. K. Rigby. 1993. The Lower Ordovician sponges of San Juan, Argentina. Brigham Young University Geology Studies 39:1-63 [A. Miller/P. Novack-Gottshall/U. Merkel] |