Alazán Sample 55: Early/Lower Oligocene, Mexico
collected by J. Álvarez

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Ostracoda - Podocopida - Cytherideidae
Clithrocytheridea grigsbyi (Howe and Chambers 1935)
original and current combination Cytheridea grigsbyi
var. vicksburgensis
Ostracoda - Podocopida - Trachyleberididae
Ambocythere aff. elongata
Ostracoda - Podocopida - Pontocyprididae
Argilloecia hiwanneensis Howe and Law 1936
see common names

Geography
Country:Mexico State/province:Veracruz
Coordinates: 21.1° North, 97.6° West (view map)
Paleocoordinates:21.8° North, 91.8° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 28.40000 m.y. ago
Stratigraphy
Formation:Alazán
Stratigraphic resolution:bed
Stratigraphy comments: the ostracods "show a distinct affinity to those present in the Red Bluff Formation, basal Oligocene of Mississippi"
Lithology and environment
Primary lithology: not reported
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:general faunal/floral analysis
Collectors:J. Álvarez
Collection method comments: Lousiana State University collection
Metadata
Database number:94168
Authorizer:J. Alroy Enterer:J. Alroy
Research group:micropaleontology
Created:2010-02-10 11:38:56 Last modified:2010-02-10 13:38:56
Access level:the public Released:2010-02-10 11:38:56
Creative Commons license:CC BY
Reference information

Primary reference:

32000. L. A. Laurencich. 1969. Some Ostracoda from the Alazán Formation, Mexico. Micropaleontology 15(4):493-503 [J. Alroy/J. Alroy]