After Weksler, Precequillo & Voss, 2006

    Hylaeamys Weksler, Precequillo & Voss, 2006
        Oryzomys (in partim)
        Oryzomys megacephalus group

        Hylaeamys acridus (Emmons & Patton, 2005)
            Oryzomys acridus Emmons & Patton, 2005

        Hylaeamys laticeps (Lund, 1840)
            Oryzomys laticeps Lund, 1840)
          including:
            Oryzomys saltator Winge, 1888
            Oryzomys seuanezi Weksler et al., 1999

        Hylaeamys oniscus (Thomas, 1904)
            Oryzomys oniscus Thomas, 1904

        Hylaeamys perenensis (J.A. Allen, 1901)
            Oryzomys perenensis J.A. Allen, 1901

        Hylaeamys tatei (Musser et al., 1998)
            Oryzomys tatei Musser et al., 1998

        Hylaeamys megacephalus (Fischer, 1814)
            Mus megacephalus Fischer, 1814
            Oryzomys megacephalus (Fischer)
          including:
            Oryzomys capito Olfers, 1818
            Oryzomys cephalotes Desmarest, 1819
            Oryzomys velutinus J.A. Allen & Chapman, 1893
            Oryzomys goeldii Thomas, 1897
            Oryzomys modestus J.A. Allen, 1899

        Hylaeamys yunganus (Thomas, 1902)
            Oryzomys yunganus Thomas, 1902

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