Sierra de Villicum, Cerro la Chilca (Ordovician of Argentina)

Where: Argentina (31.0° S, 69.0° W: paleocoordinates 34.8° S, 132.2° W)

• local area-level geographic resolution

When: Ahtiella argentina brachiopod zone, San Juan Formation, Early/Lower Llanvirn (468.0 - 461.1 Ma)

• Lower Llanvirn section of San Juan Fm.

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, dolomitic, shelly/skeletal, argillaceous limestone and marl

• thin-bedded, gray, argillaceous, sometimes dolomitic, limestone (bioclastic wackestone, packstone, rudstone, and grainstone), with occasional calcarenite and calcitic mudstone

Size class: macrofossils

Primary reference: Z. A. Herrera and J. L. Benedetto. 1987. El genero Reinversella (Brachiopoda) en el Ordovicico temprano de la Precordillera Argentina y su significado paleobiogeografico. Actas del decimo congreso geologico argentino 3:77-80 [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8748: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 28.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopod and sponge taxonomy and biostrat.
Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
"Basiliella sp." = Basilicus (Basiliella)
"Basiliella sp." = Basilicus (Basiliella) Kobayashi 1934 trilobite
 Trinucleida - Raphiophoridae
Ampyx sp., Mendolaspis sp.
Ampyx sp. Dalman 1827 trilobite
Mendolaspis sp. Rusconi 1951 trilobite
 Corynexochida - Illaenidae
Illaenus sp.
Illaenus sp. Dalman 1827 trilobite
 Corynexochida - Leiostegiidae
Annamitella sp.
Annamitella sp. Mansuy 1920 trilobite
 Corynexochida - Styginidae
Waisfeldaspis sp.
Waisfeldaspis sp. Vaccari 2001 trilobite
 Harpetida - Harpetidae
Scotoharpes sp.
Scotoharpes sp. Lamont 1948 trilobite
Gastropoda
 Euomphalina - Macluritidae
Maclurites sp.
Maclurites sp. Le Sueur 1818 snail
Rostroconchia
 Conocardiida - Eopteriidae
Talacastella herrerai
Talacastella herrerai Sanchez 1986
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
 Billingsellida - Tritoechiidae
Pomatotrema sp.
Pomatotrema sp. Ulrich and Cooper 1932
 Strophomenida - Leptellinidae
Leptellina sp.
Leptellina sp. Ulrich and Cooper 1936
 Strophomenida - Taffiidae
Ahtiella argentina, Inversella sp., Inversella (Reinversella) arancibiai, Leptella sp., Petroria rugosa, Taffia anomala, Sanjuanella plicata
Ahtiella argentina Benedetto and Herrera 1986
Inversella sp. Opik 1933
Leptella sp. Hall and Clarke 1892
Petroria rugosa Wilson 1926
Taffia anomala Benedetto and Herrera 1986
Rhynchonellata
 Orthida - Plaesiomyidae
Valcourea sp.
Valcourea sp. Raymond 1911
 Orthida - Orthidiellidae
Orthidium sp.
Orthidium sp. Hall and Clarke 1892
 Orthida - Orthidae
Paralenorthis vulgaris
 Orthida - Archaeorthidae
Pleurorthis sp.
Pleurorthis sp. Cooper 1956
 Orthida - Productorthidae
Productorthis cienagaensis
 Orthida - Plectorthidae
Nanorthis sp.
Nanorthis sp. Ulrich and Cooper 1936
 Orthida - Phragmorthidae
Phragmorthis sp.
Phragmorthis sp. Cooper 1956
 Orthida - Platystrophiidae
Platystrophia sp.
 Orthida - Paurorthidae
Paurorthis sp.
Paurorthis sp. Schuchert and Cooper 1931
 Pentamerida - Camerellidae
Camerella sp., Idiostrophia sp.
Camerella sp. Billings 1859
Idiostrophia sp. Ulrich and Cooper 1936
Stenolaemata
 Trepostomida - Amplexoporidae
Amplexopora sp.
 Trepostomata - Halloporidae
Hallopora sp.
Hallopora sp. Bassler 1911
Demospongiae
 Megalithistida - Saccospongiidae
Rugospongia sp.
Rugospongia sp. Carrera 1996 demosponge
 Lithistida - Anthaspidellidae
Talacastonia sp., Protachilleum sp., Archaeoscyphia sp., Anthaspidella sp., Psarodictyum sp., Calycocoelia sp., Incrassospongia sp., Patellispongia sp., Rhopalocoelia sp.
Talacastonia sp. Beresi and Rigby 1993 demosponge
Protachilleum sp. Zittel 1877 demosponge
Archaeoscyphia sp. Hinde 1889 demosponge
Anthaspidella sp. Ulrich and Everett 1889 demosponge
Psarodictyum sp. Raymond and Okulitch 1940 demosponge
Calycocoelia sp. Bassler 1927 demosponge
Incrassospongia sp. Rigby 1977 demosponge
Patellispongia sp. Bassler 1927 demosponge
Rhopalocoelia sp. Raymond and Okulitch 1940 demosponge
 Lithistida - Streptosolenidae
Allosaccus sp., Hudsonospongia sp., Lissocoelia sp., Aulocopium sp.
Allosaccus sp. demosponge
Hudsonospongia sp. Raymond and Okulitch 1940 demosponge
Lissocoelia sp. Bassler 1927 demosponge
Aulocopium sp. Oswald 1847 demosponge
Heteractinida
 Octactinellida - Eiffeliidae
Chilcaia sp.
Chilcaia sp. Carrera 1994