Don Braulio, Villicum Range (Ordovician of Argentina)

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

• fine-grained limestones and lime mudstones

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

Show authors, comments, and common names
unclassified
  -
Porifera indet.
Porifera indet. Grant 1836
Demospongiae
 Lithistida - Streptosolenidae
Aulocopium sanjuanensis, Hudsonospongia cyclostoma
Aulocopium sanjuanensis Beresi and Rigby 1993 demosponge
Hudsonospongia cyclostoma Raymond and Okulitch 1940 demosponge
 Lithistida - Anthaspidellidae
Archaeoscyphia minganensis, Archaeoscyphia pulchra, Calycocoelia sp., Calycocoelia perforata n. sp., Patellispongia sp., Patellispongia robusta, Psarodictyum sp., Psarodictyum magna n. sp., Rhopalocoelia regularis, Rhopalocoelia tenuis, Rhopalocoelia clarkii
Archaeoscyphia minganensis Billings 1859 demosponge
Archaeoscyphia pulchra Bassler 1927 demosponge
Calycocoelia sp. Bassler 1927 demosponge
Calycocoelia perforata n. sp. Beresi and Rigby 1993 demosponge
Patellispongia sp. Bassler 1927 demosponge
Patellispongia robusta Beresi and Rigby 1993 demosponge
Psarodictyum sp. Raymond and Okulitch 1940 demosponge
Psarodictyum magna n. sp. Beresi and Rigby 1993 demosponge
Rhopalocoelia clarkii Raymond and Okulitch 1940 demosponge
unclassified
  -
Pelmatozoa indet., Annelida indet.
Pelmatozoa indet. Leuckart 1848
Annelida indet. Lamarck 1809
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Bryozoa
  -
Bryozoa indet.