After Voss, Gardner & Jansa, 2004

    Cryptonanus Voss, Lunde & Jansa, 2005
      ?including:
        Lestodelphys Tate, 1934
        Notodelphys Thomas, 1921

        Cryptonanus agricolai (Moojen, 1943)
            Grymaeomys pusillus Winge, 1893 (in partim)
                (non Thylamys pusillus (Desmarest, 1804))
            Marmosa agilis agilis Tate, 1933 (in partim)
                (non Marmosa agilis Burmeister, 1854 [= Gracilinanus agilis (Burmeister, 1854)])
            Marmosa agricolai Moojen, 1943
            Marmosa (Thylamys) agricolai Moojen; Cabrera, 1958
            Thylamys agricolai (Moojen), Reig et al., 1985
            Gracilinanus emiliae (Thomas, 1909) Gardner & Creighton, 1989

        Cryptonanus chacoensis (Tate, 1931)
            Marmosa agilis chacoensis Tate, 1931
            Marmosa (Thylamys) agilis agilis Tate; Cabrera, 1958
            Gracilinanus agilis (Burmeister, 1854) Gardner & Creighton, 1989

         Cryptonanus guahybae (Tate, 1931)
            Marmosa microtarsus guahybae Tate, 1931
            Marmosa () microtarsus guahybae Tate; Cabrera, 1958
            Gracilinanus microtarsus (Tate); Gardner & Creighton, 1989

        Cryptonanus ignitus (Díaz, Flores & Barquez, 2002)
            Gracilinanus ingitus Díaz, Flores & Barquez, 2002

        Cryptonanus unduaviensis (Tate, 1931)
                Marmosa unduaviensis Tate, 1931
                Marmosa (Thylamys) unduaviensis Tate; Cabrera, 1958
                Thylamys unduaviensis (Tate); Reig et al., 1985
                Gracilinanus agilis (Burmeister, 1854) Gardner & Creighton, 1989
                ?Hyladelphys unduaviensis
                ?Grymaeomys unduaviensis

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