Caluromys lanatus (Olfers, in W.L. Eschwege, 1818)
Chaetophractus vellerosus (Gray, 1865) - screaming hairy armadillo
Chaetophractus villosus (Desmarest, 1804) - big hairy armadillo
Chironectes minimus (Zimmermann, 1780) - yapok
Conepatus humboldtii Gray, 1837 - Humboldt's hog-nosed skunk
Desmodus rotundus (É. Geoffroy Saint-Hilaire, 1810) - common vampire bat
Didelphis albiventris Lund, 1840
Didelphis aurita (Wied-Neuwied, 1826)
Galictis cuja (Molina, 1782) - lesser grison
Gracilinanus agilis (Burmeister, 1854)
Leopardus geoffroyi (d'Orbigny & Gervais, 1844) - Geoffroy's cat
Lutreolina crassicaudata (Desmarest, 1804) Thomas, 1910 - thick-tailed opossum
Metachirus nudicaudatus (É. Geoffroy Saint-Hilaire, 1803) - brown "four-eyed" opossum
Micoureus paraguayanus (Tate, 1931)
Monodelphis domestica (Wagner, 1842) - grey short-tailed opossum
Monodelphis scalops (Thomas, 1888) - red-headed short-tailed opossum
Monodelphis sorex (Hensel, 1872) - soricine short-tailed opossum
Philander frenatus (Olfers, in W.L. Eschwege, 1818)
Puma concolor (Linnaeus, 1771) - cougar
Thylamys macrurus (Olfers, in W.L. Eschwege, 1818)
Thylamys pusillus (Desmarest, 1804)
Gymnogeophagus caaguazuensis Staeck, 2006
Microglanis carlae H.S.V. Alcaraz et al., 2008
Sagenista scutellaris (Spinola, 1841) R. Bohart, 1967:157
Aculepeira albovittata (Mello-Leitão, 1941)
Aculepeira apa Levi, 1991
Aculepeira vittata (Gerschman & Schiapelli, 1948)
Alpaida alticeps (Keyserling, 1879)
Alpaida alto Levi, 1988
Alpaida amambay Levi, 1988
Alpaida carminea (Taczanowski, 1878)
Alpaida chaco Levi, 1988
Alpaida gallardoi Levi, 1988
Alpaida grayi (Blackwall, 1863)
Alpaida hoffmanni Levi, 1988
Alpaida itapua Levi, 1988
Alpaida latro (Fabricius, 1775)
Alpaida quadrilorata (Simon, 1897)
Alpaida rubellula (Keyserling, 1892)
Alpaida versicolor (Keyserling, 1877)
Alpaida yuto Levi, 1988
Araneus horizonte Levi, 1991
Araneus lathyrinus (Holmberg, 1875)
Araneus omnicolor (Keyserling, 1893)
Araneus unanimus (Keyserling, 1879)
Araneus venatrix (C.L. Koch, 1838)
Araneus vincibilis (Keyserling, 1893)
Carepalxis camelus Simon, 1895
Chaetacis aureola (C.L. Koch, 1836)
Chaetacis picta (C.L. Koch, 1836)
Eustala isosceles Mello-Leitão, 1939
Eustala tribrachiata Badcock, 1932
Larinia bivittata Keyserling, 1885
Mangora chao Levi, 2007
Mangora leverger Levi, 2007
Mangora peichiuta Levi, 2007
Mangora uziga Levi, 2007
Mecynogea erythromela (Holmberg, 1876)
Metepeira glomerabilis (Keyserling, 1892)
Metepeira gressa (Keyserling, 1892)
Micrathena annulata Reimoser, 1917
Micrathena crassispina (C.L. Koch, 1836)
Micrathena nigrichelis Strand, 1908
Micrathena patruelis (C.L. Koch, 1839)
Micrathena schenkeli Mello-Leitão, 1939
Micrathena swainsoni (Perty, 1833)
Ocrepeira fiebrigi (Dahl, 1906)
Ocrepeira hirsuta (Mello-Leitão, 1942)
Parawixia bistriata (Rengger, 1836)
Pozonia bacillifera (Simon, 1897)
Spintharidius rhomboidalis Simon, 1893
Synotaxus waiwai Agnarsson, 2003
Trochanteria gomezi Canals, 1933
Verrucosa meridionalis (Keyserling, 1892)
Wagneriana atuna Levi, 1991
Wagneriana iguape Levi, 1991
Wagneriana juquia Levi, 1991
Wagneriana madrejon Levi, 1991
Wagneriana uzaga Levi, 1991
Xylethrus superbus Simon, 1895
Mastophora holmbergi Canals, 1931
Mastophora reimoseri Levi, 2003
Coccidioides immitis G.W. Stiles, 1896
†Carminella maplewoodensis Cramer, 1968a
https://www.cia.gov/library/publications/the-world-factbook/geos/pa.html