extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of deltatheroidan.B. M. Davis, R. L. Cifelli, and Z. Kielan-Jaworowska. 2008. 1. Earliest Evidence of Deltatheroida (Mammalia: Metatheria) from the Early Cretaceous of North America. Mammalian Evolutionary Morphology: A Tribute to Frederick S. Szalay 3-24