Cuidad Victoria, USNM 13004 (Silurian to of Mexico)

Where: Tamaulipas, Mexico (23.8° N, 99.3° W: paleocoordinates 25.6° S, 76.0° W)

• small collection-level geographic resolution

When: Santa Ana Limestone Member (Canon de Caballeros Formation), Homerian to Homerian (430.5 - 425.6 Ma)

• The authors indicate that the Santa Ana Member may be diachronous, as to the N some taxa there indicate an age of late Llandovery. They feel that it isn't diachronous, just the age determination needs more work.

• member-level stratigraphic resolution

Environment/lithology: sand shoal; lithified, shelly/skeletal grainstone

• "The fauna from the Santa Ana at loc. JS93-88 represents a rough water Pentamerus community assigned to BA3. Dominance of Atrypa in Stinnesbeck collection...indicates a discrete ecological setting although BA3 is likewise indicated."
• distinctive bioclastic grainstone commonly with abundant coarse grains and granules of polycrystalline and monocrystalline quartz.

Primary reference: A. J. Boucot, R. B. Blodgett, and J. H. Stewart. 1997. European province Late Silurian brachiopods from the Ciudad Victoria area, Tamaulipas, northeastern Mexico. Geological Society of America Special Paper 321:273-293 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5115: authorized by John Alroy, entered by Mike Sommers on 30.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Spiriferida -
Spiriferida indet.
Spiriferida indet. Waagen 1883
"rostrospiroid"
 Orthida - Dicoelosiidae
Dicoelosia sp.
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Dalmanellidae indet.
Dalmanellidae indet. Schuchert 1913
Strophomenata
 Strophomenida - Stropheodontidae
Stropheodontidae indet.
 Strophomenida - Chonetidae
Chonetidae indet.
Chonetidae indet. Bronn 1862
"coarse ribbed"
 Orthotetida - Orthotetidae
Orthotetidae indet.
Orthotetidae indet. Waagen 1884