 If the lifestyle of "Nicrosaurus" is limited to land and freshwater swamps it makes sense that most of fossil specimens are found around the Germanic Basin.Specimen have been found in various bed lithology, including sandstone, marl, dolomite, breccia, and claystone.A 2002 phylogenetic analysis found that the genera "Pseudopalatus", "Mystriosuchus", "Redondasaurus" and "Nicrosaurus" are all under the clade Pseudopalatinae.