ABOUT THE DATABASE:
The primary data
are published occurrences of mammals of late Oligocene (Arikareean)
through Miocene (Hemphillian) age in the western United States (i.e.
between approximately longitudes 95º-125º W in the USA, excluding the
Texas Gulf Coast). For each species occurrence, the following data were
entered: taxonomic name (as of 2005), latitude and longitude, relative
age range, geological occurrence, and taphonomic information as specified
at the MIOMAP data site.
The MIOMAP database
structure parallels the FAUNMAP
structure to facilitate analyses that might require both databases.
Data entry began
in 2000 and concluded in 2005. As of 2005, this is an archival database,
meaning that the information is a static representation of the data
entered before June 30, 2005, with taxonomy and age assignments appropriately
converted to the standards as described on subsequent pages. For use
in research applications, the complete or partial database can be downloaded.
Users should update the archival database as appropriate for their purposes,
and cite the MIOMAP project as noted below* in publications.
M. A. Carrasco
extracted the data from the literature and entered it for most of the
states. For the states of Idaho, Montana, and Wyoming, data was originally
compiled by A. D. Barnosky; checked, added to, and entered by Sabrina
Minter and B. P. Kraatz; and updated by A. D. Barnosky and M. A. Carrasco.
The Nevada portion of the database was developed by E. B. Davis. A.
D. Barnosky coordinated the project.
