Where: Puerto Rico (18.4° N, 67.0° W: paleocoordinates 17.6° N, 66.0° W)
• coordinate estimated from map
• hand sample-level geographic resolution
When: Lares Limestone Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)
• correlates with the Chickasawhay (i.e., late Oligocene)
• bed-level stratigraphic resolution
Environment/lithology: marine; white marl
Size class: microfossils
Collected by W. A. Gordon
Collection methods: bulk, chemical, sieve,
• Lousiana State University collection
•samples consist of "washed residues" that I assume were chemically treated because most come from presumably lithified marls and limestones
Primary reference: W. A. van den Bold. 1965. Middle Tertiary Ostracoda from northwestern Puerto Rico. Micropaleontology 11(4):381-414 [J. Alroy/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 94193: authorized by John Alroy, entered by John Alroy on 10.02.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
Ostracoda | |
Cushmanidea howei ostracod | |
Propontocypris sp. ostracod | |
Macrocypris sp. ostracod | |
"Quadracythere" sp. Hornibrook 1952 ostracod
Jugosocythereis spinosa ostracod
Procythereis laresensis ostracod | |
Bythocypris sp. Brady 1880 ostracod
? Bythocypris gibsonensis Howe and Chambers 1935 ostracod |