All sites are Barstovian and the three most abundant categories of small mammals are the geomyoid, cricetid and heteromyid rodents.
A Heteromyid (11%) Cricetid (31%) Geomyoid (58%) Discovery Rodent Distribution (total 45) B Heteromyid (11.8%) Cricetid (28.6%) Geomyoid (59.6%) TVOR Rodent Distribution (total: 332) C Heteromyid (30%) Cricetid (20%) Geomyoid (50%) Gully Rodent Distribution (total: 10) D Heteromyid (20%) Cricetid (51.2%) Geomyoid (28.8%) Stonehenge Rodent Distribution (total: 80) Figure 3.
A new genus of geomyoid rodent from the Miocene of Texas and Panama.
The presumed ecology of geomyoids at both Fort Polk and the two Texas sites is less certain, because they may not be closely comparable to modern geomyoids.