Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Echimyidae Gray, 1825 - spiny rats
         Subfamily Eumysopinae Rusconi, 1935 see Subfamily Heteropsomyinae Anthony, 1917
           Genus Proechimys Allen, 1899 - spiny rats
             01 Proechimys albispinus (I. Geoffroy, 1838) see Trinomys albispinus (I. Geoffroy, 1838)
             02 Proechimys amphichoricus Moojen, 1948
             03 Proechimys bolivianus Thomas, 1901
             04 Proechimys brevicauda (Günther, 1877)
             05 Proechimys canicollis (J.A. Allen, 1899)
             06 Proechimys cayennensis (Desmarest, 1817)
             07 Proechimys chrysaeolus (Thomas, 1898)
             08 Proechimys cuvieri Petter, 1978
             09 Proechimys decumanus (Thomas, 1899)
             10 Proechimys dimidiatus (Günther, 1877) see Trinomys dimidiatus (Günther, 1877)
             11 Proechimys goeldii Thomas, 1905
             12 Proechimys gorgonae Bangs, 1905
             13 Proechimys guairae Thomas, 1901
             14 Proechimys gularis Thomas, 1911
             15 Proechimys hendeei Thomas, 1926
             16 Proechimys hoplomyoides (Tate, 1939)
             17 Proechimys iheringi Thomas, 1911 see Trinomys iheringi (Thomas, 1911)
             18 Proechimys longicaudatus (Rengger, 1830)
             19 Proechimys magdalenae (Hershkovitz, 1948)
             20 Proechimys mincae (J.A. Allen, 1899)
             21 Proechimys myosuros (Lichtenstein, 1820) see Trinomys myosuros (Lichtenstein, 1820)
             22 Proechimys oconnelli J.A. Allen, 1913
             23 Proechimys oris Thomas, 1904
             24 Proechimys poliopus Osgood, 1914
             25 Proechimys quadruplicatus Hershkovitz, 1948
             26 Proechimys semispinosus (Tomes, 1860) - Tomes' spiny rat
             27 Proechimys setosus (Desmarest, 1817) see Trinomys setosus (Desmarest, 1817)
             28 Proechimys simonsi Thomas, 1900
             29 Proechimys steerei Goldman, 1911
             30 Proechimys trinitatis (J.A. Allen & Chapman, 1893)
             31 Proechimys urichi (J.A. Allen, 1899)
             32 Proechimys warreni Thomas, 1905
             33 Subgenus Trinomys Thomas, 1921 see Genus Trinomys Thomas, 1921
             34 Subgenus Proechimys J.A. Allen, 1899 see Genus Proechimys Allen, 1899