Order Didelphimorphia Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 3 18 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Tlacuatzin Voss and Jansa 2003 Tlacuatzin Voss and Jansa 2003 , Bull. Am. Mus. Nat. Hist., 276: 61 . Type Species: Didelphis (Micoureus) canescens J. A. Allen 1893 Species and subspecies: 1 species with 2 subspecies: Species Tlacuatzin canescens (J. A. Allen 1893) Subspecies Tlacuatzin canescens subsp. canescens J. A. Allen 1893 Subspecies Tlacuatzin canescens subsp. gaumeri Osgood 1913 Discussion: Monotypic; previously included under Marmosa .