Cuidad Victoria, USNM 13001: Homerian - Gorstian, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
"Rugose corals."
unclassified
Brachiopoda indet. Cuvier 1805
"Brachiopods indet."
Rhynchonellata - Spiriferida - Cyrtiidae
Eospirifer sp. Schuchert 1913
Rhynchonellata - Athyridida - Meristellidae
Meristina sp. Hall 1867
Rhynchonellata - Atrypida - Atrypidae
Atrypa reticularis (Linnaeus 1758)
original and current combination Anomia reticularis
Rhynchonellata - Orthida - Dalmanellidae
Dalmanellidae indet. Schuchert 1913
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchonella aff. stricklandi (Sowerby and Murchison 1839)
recombined as Trigonirhynchia stricklandii
Strophomenata - Strophomenida - Stropheodontidae
Stropheodontidae indet. Caster 1939
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena rhomboidalis (Wahlenberg 1818)
recombined as Leptaena (Leptaena) rhomboidalis
see common names

Geography
Country:Mexico State/province:Tamaulipas
Coordinates: 23.8° North, 99.3° West (view map)
Paleocoordinates:25.6° South, 76.0° West
Geographic resolution:small collection
Time
Period:Silurian
10 m.y. bin:Silurian 2
*Period:Middle Silurian - Late/Upper Silurian
*International age/stage:Homerian - Gorstian
Key time interval:Homerian - Gorstian
Age range of interval:430.50000 - 425.60000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Canon de Caballeros Member:Santa Ana Limestone
Stratigraphic resolution:member
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:shelly/skeletal lithified grainstone
Lithology description: distinctive bioclastic grainstone commonly with abundant coarse grains and granules of polycrystalline and monocrystalline quartz.
Environment:sand shoal
Geology comments: "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."
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:5113
Authorizer:J. Alroy Enterer:M. Sommers
Modifier:M. Sommers Research group:marine invertebrate
Created:1999-08-30 15:42:56 Last modified:2003-07-18 18:05:03
Access level:the public Released:2000-11-20 13:53:25
Creative Commons license:CC BY
Reference information

Primary reference:

212. 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]