Atlantogenata is a proposed clade of mammals containing the cohorts or superorders Xenarthra and Afrotheria. For each system, only the superorders are listed. Within the Acari are two superorders&colon; the Acariformes and the Parasitiformes. Laurasiatheria is also posited to include several extinct orders and superorders. These two classes are subdivided into subclasses, and then superorders, orders, and families. In any case, three main palaeopteran lineages, traditionally treated as superorders, are recognized. Variously, both Euarchonta and Euarchontoglires are ranked as superorders. The Ellesmerocerida in turn gave rise to the superorders Endoceratoidea, Actinoceratoidea, Discosoratoidea, Orthoceratoidea, and Nautilitoidea. List of amphibian genera lists the vertebrate class of amphibians by genus, spanning two superorders. Wade (1988) divided the subclass Nautiloidea into 6 superorders, combining orders that are phylogenetically related.