The Blancan, Irvingtonian
, and Rancholabrean Mammal Ages.
2003: Mammalian biochronology of Blancan and Irvingtonian
(Pliocene and early Pleistocene) faunas from New Mexico.
All the bones have been dated to the Irvingtonian
period, which spanned 1.
If this scenario is correct, then perhaps the specimen dates back to earlier Irvingtonian
times corresponding with both the "smallish" armadillo scute from the Slaton Quarry (see Dalquest & Schultz 1992), and reflecting the temporal size trend for D.
The Gila monster may have been widely distributed in the Mojave and Colorado Deserts around this time as Pleistocene (Rancholabrean) fossils are known from Gypsum Cave in Clark County, Nevada (Brattstrom 1954), and a late Irvingtonian
fossil of Heloderrna spp.
Kurten and Anderson (1980) reported at least 20 sites from across North America, including several that are late Irvingtonian
in age although most are Rancholabrean.
In the Blancan to earliest Irvingtonian
Aztlanolagus (Lagomorpha: Leporidae) is currently considered a monotypic genus from the Irvingtonian
4 million years to a period known as the Irvingtonian
North American Land Mammal Age.
Remains of Cuvieronius have been collected from the bottom of the lake and could represent the Irvingtonian
NALMA (early Pleistocene).
1999: Biostratigraphy of Blancan and Irvingtonian
Mammals in the Fish Creek-Vallecito Creek Section, Southern California, and a Review of the Blancan-Irvingtonian
SCIENCE, POLITICS, THE PUBLIC AND PROTECTING CALIFORNIA'S COASTAL MARINE ECOSYSTEMS 12:20-1:20 LUNCH BREAK 143 1:20 A NEW IRVINGTONIAN
LAND MAMMAL ASSEMBLAGE FROM THE SAUGUS FORMATION, MOORPARK, VENTURA COUNTY, CALIFORNIA.