Stratigraphy, paleontology and age of the Fruitland and Kirtland Formations (upper Cretaceous), San Juan Basin, New Mexico Hunt, A. P. Lucas, S. G. 6224G Linnaeus, 1758 Linnaeus 1758 [1238,1400,409,441] Mammalia GBIF Animalia 16 231 Chordata class  Mammalian fossils were firstrecovered from theFruitland Formation by W. A. Clemens in the 1960 s( Clemens, 1973). From themid-1970s to the mid-1980s large-scale screenwashingwas carried out by E. H. Lindsay( University of Arizona), D. L. Wolberg ( New MexicoBureau of Mines and MineralResources) and J. K. RigbyJr. (formerly of the U.S. Bureau ofLand Managementand now atNotre Dame University). Themajority ofthese collections havenot been described,  notablythe Universityof Kansas specimens collected  byClemensand the nontherians from the Fossil Forest areaunder studyby Wolbergand Rigby. Flynn (1986)described the more limited collections from the Universityof Arizona, and  Rigbyand Wolberg(1987) studiedthe therianmammals from the Fossil Forest area.