After Uetz, Etzold & Chenna, 1995-2005 [“The TIGR Reptile Database ” (former EMBL Reptile Database)]

    Phrynops
        Emys
        Platemys
        Hydraspis
        Ranacephala
        Rhinemys
        Batrachemys
        Bufocephala
        Mesoclemmys

        Phrynops williamsi Rhodin & Mittermaier in Rhodin & Miyata, 1983 (William's Toadhead Turtle, William's South-American Side-necked Turtle)
            Phrynops williamsi Rhodin & Mittermaier; McCord, Mehdi & Lamar 2001
            Phrynops williamsi Rhodin & Mittermaier; Uetz, Etzold & Chenna, 1995-2005

        (Phrynops)

            Phrynops (Phrynops) geoffroanus (Schweigger, 1812) (Geoffroy's Toadhead Turtle, Geoffroy's Side-necked Turtle)
                Emys geoffroana Schweigger, 1812
                Emys Geoffreana Schweigger, 1812 (fide Boulenger, 1886)
                Emys depressa Merrem, 1820 (non Emys depressa Spix, 1824)
                Emys viridis Spix, 1824 (?)
                Emys geoffroyana Gray, 1831 (nomen subst. pro E. geoffroana Schweigger)
                Platemys geoffreana Duméril & Bibron, 1835 (nomen subst. pro E. geoffroana Schweigger)
                Platemys Waglerii Duméril & Bibron, 1835
                Platemys Neuwiedii Duméril & Bibron, 1835 (nomen subst. pro Emys depressa Merrem)
                Platemys Geoffroyana Gray; Boulenger, 1886
                Hydraspis geoffroyana Gray; Boulenger, 1889
                Hydraspis wagleri Duméril & Bibron; Boulenger, 1889
                Hydraspis boulengeri Bohls, 1895
                Hydraspis lutzi Ihering in Luederwaldt 1926 (?)
                Phrynops geoffroana (Schweigger); Mertens et al., 1934 
                Phrynops geoffroana geoffroana (Schweigger); Müller, 1939
                Phrynops geoffroanus (Schweigger); Gorzula & Señaris, 1999
                Phrynops geoffroanus (Schweigger); McCord, Mehdi & Lamar 2001
                Phrynops geoffroanus (Schweigger); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Phrynops) tuberosa (Peters, 1870)
                Platemys tuberosa Peters, 1870
                Hydraspis tuberosa (Peters); Boulenger, 1889
                Phrynops tuberosa (Peters); Mertens et al., 1934
                Phrynops geoffroana tuberosa (Peters); Müller, 1939
                Phrynops geoffroanus tuberosus (Peters); Duellman, 1978
                Phrynops tuberosus (Peters); David, 1994
                Phrynops tuberosa (Peters); McCord, Mehdi & Lamar, 2001
                Phrynops tuberosus (Peters); McCord & Joseph-Ouni, 2002
                Phrynops tuberosus (Peters); Souza, 2004
                Phrynops tuberosus (Peters); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Phrynops) hilarii (Duméril & Bibron, 1835)
                Platemys Hilarii Duméril & Bibron 1835: 428 
                Spatulemys lasalae Gray 1872
                Spatulemys lasalae Gray; Gray 1873
                Platemys Hilairii Duméril & Bibron; Boulenger 1886
                Hydraspis Hilairii (Duméril & Bibron); Boulenger 1888
                Hydraspis hilarii (Duméril & Bibron); Boulenger 1889
                Phrynops hilarii (Duméril & Bibron); Mertens et al. 1934
                Phrynops geoffroana hilarii (Duméril & Bibron); Müller 1939
                Phrynops geoffroanus hilarii (Duméril & Bibron); Lüling, 1984
                Phrynops hilarii (Duméril & Bibron); Ernst & Barbour 1989
                Phrynops hilarii (Duméril & Bibron); McCord, Mehdi & Lamar, 2001
                Phrynops hilarii (Duméril & Bibron); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Phrynops) hogei Mertens, 1967
                Phrynops hogei Mertens, 1967
                Phrynops hogei Mertens; Ernst & Barbour 1989
                Ranacephala hogei (Mertens); McCord, Mehdi & Lamar 2001
                Ranacephala hogei (Mertens); McCord & Joseph-Ouni 2002
                Ranacephala hogei (Mertens); Souza 2004
                Phrynops hogei Mertens; Uetz, Etzold & Chenna, 1995-2005
 
            Phrynops (Phrynops) rufipes (Spix, 1824)
                Emys rufipes Spix, 1824
                Emys stenops Spix, 1824 (?)
                Platemys Rufipes (Spix); Duméril & Bibron 1835
                Phrynops rufipes (Spix); Gray, 1844
                Hydraspis rufipes (Spix); Boulenger, 1889
                Phrynops rufipes (Spix); Ernst & Barbour, 1989
                Rhinemys rufipes (Spix); McCord, Mehdi & Lamar, 2001
                Rhinemys rufipes (Spix); McCord & Joseph-Ouni, 2002
                Rhinemys rufipes (Spix); Souza, 2004
                Phrynops rufipes (Spix); Uetz, Etzold & Chenna, 1995-2005


        (Batrachemys)

            Phrynops (Batrachemys) dahli Zangerl & Medem 1958
                Phrynops (Batrachemys) dahli Zangerl & Medem, 1958
                Phrynops (Batrachemys) dahliZangerl & Medem; Alderton, 1988
                Phrynops dahli Zangerl & Medem; Ernst & Barbour 1989
                Batrachemys dahli (Zangerl & Medem); McCord, Mehdi & Lamar 2001
                Batrachemys dahli (Zangerl & Medem); McCord & Joseph-Ouni 2002
                Phrynops dahli Zangerl & Medem; Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) nasuta (Schweigger, 1812) (Guianan Toadhead Turtle, Common Toadheaded Turtle)
                Emys nasuta Schweigger, 1812
                Emys barbatula Gravenhorst, 1829
                Emys nasua Schweigger; Gray 1831
                Platemys Schweiggerii Duméril & Bibron 1835 (nomen subst. pro E. nasuta Schweigger)
                Hydraspis raniceps Gray, 1855
                Hydraspis maculata Gray, 1873
                Rhinemys nasuta (Schweigger); Boulenger, 1889
                Batrachemys nasuta (Schweigger); Stejneger, 1909
                Rhinemys tuberculata Luederwaldt, 1926 (?)
                Phrynops nasuta (Schweigger); Pritchard, 1967
                Phrynops (Batrachemys) nasutus (Schweigger); Alderton, 1988
                Batrachemys nasuta (Schweigger); McCord, Mehdi & Lamar, 2001
                Batrachemys nasuta (Schweigger); McCord & Joseph-Ouni, 2002
                Batrachemys nasuta (Schweigger); Souza, 2004
                Phrynops nasuta (Schweigger); Uetz, Etzold & Chenna, 1995-2005


            Phrynops (Batrachemys) tuberculata (Luederwaldt, 1926) (Tuberculate Toadhead Turtle)
                Rhinemys tuberculata Luederwaldt, 1926
                Phrynops (Batrachemys) tuberculatus (Luederwaldt); Alderton 1988 
                Phrynops tuberculatus (Luederwaldt); King & Burke, 1989
                Batrachemys tuberculata (Luederwaldt); McCord, Mehdi & Lamar, 2001
                Batrachemys tuberculata (Luederwaldt); McCord & Joseph-Ouni, 2002
                Batrachemys tuberculata (Luederwaldt); Souza, 2004
                Phrynops tuberculata (Luederwaldt); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) vanderhaegei Bour, 1973 (Vanderhaege's Toadhead Turtle)
                Phrynops schopfii “Fitzinger” Diering (nomen nudum)
                Phrynops paraguayensis “Vanzolini” Donoso-Barros (nomen nudum)
                Phrynops tuberculatus vanderhaegei Bour, 1973
                Phrynops vanderhaegei Bour; Pritchard, 1979
                Phrynops (Batrachemys) vanderhaegei Bour; Alderton, 1988
                Bufocephala vanderhaegei (Bour); McCord, Mehdi & Lamar, 2001
                Bufocephala vanderhaegei (Bour); McCord & Joseph-Ouni, 2002
                Bufocephala vanderhaegei (Bour); Souza, 2004
                Phrynops vanderhaegei Bour; Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) gibba (Schweigger, 1812) (Gibba (Toadhead) Turtle)
                Emys gibba Schweigger, 1812
                Platemys Miliusii Duméril & Bibron, 1835
                Platemys Gibba (Schweigger); Duméril & Bibron, 1835
                Hydraspis gordoni Gray, 1868
                Hydraspis bicolor Gray, 1873
                Mesoclemmys gibba (Schweigger); Gray, 1873
                Hydraspis gibba (Schweigger); Boulenger, 1889
                Phrynops gibbus (Schweigger); Wermuth & Mertens, 1977
                Mesoclemmys gibba (Schweigger); Duellman, 1978
                Phrynops (Mesoclemmys) gibbus (Schweigger); Alderton, 1988
                Phrynops gibbus (Schweigger); Gorzula & Señares, 1999
                Mesoclemmys gibba (Schweigger); McCord, Mehdi & Lamar, 2001
                Mesoclemmys gibbus (Schweigger); McCord & Joseph-Ouni, 2002
                Phrynops gibbus (Schweigger); Lehr, 2002
                Phrynops gibbus (Schweigger); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) heliostemma (McCord, Joseph-Ouni & Lamar, 2001) (Amazon Toadhead Turtle)
                Batrachemys heliostemma McCord, Joseph-Ouni & Lamar, 2001
                Batrachemys heliostemma McCord, Joseph-Ouni & Lamar; McCord & Joseph-Ouni, 2002 
                Batrachemys heliostemma McCord, Joseph-Ouni & Lamar; Souza, 2004 
                Phrynops heliostemma (McCord, Joseph-Ouni & Lamar); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) raniceps (Gray, 1855) (Black-lined Toadhead Turtle)
                Hydraspis raniceps Gray, 1855
                Phrynops raniceps (Gray); Iverson, 1992
                Batrachemys raniceps (Gray); McCord, Mehdi & Lamar, 2001
                Batrachemys raniceps (Gray); McCord & Joseph-Ouni, 2002
                Batrachemys raniceps (Gray); Souza, 2004
                Phrynops raniceps (Gray); Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) wermuthi Mertens, 1969
                Phrynops (Batrachemys) nasutus wermuthi Mertens; Alderton, 1988
                Phrynops wermuthi Mertens; Uetz, Etzold & Chenna, 1995-2005

            Phrynops (Batrachemys) zuliae Pritchard & Trebbau, 1984
                Phrynops zuliae Pritchard & Trebbau, 1984
                Phrynops (Batrachemys) zuliae Pritchard & Trebbau; Alderton, 1988
                Batrachemys zuliae Pritchard & Trebbau; McCord, Mehdi & Lamar, 2001
                Batrachemys zuliae Pritchard & Trebbau; McCord & Joseph-Ouni, 2002
                Phrynops zuliae Pritchard & Trebbau; Uetz, Etzold & Chenna, 1995-2005

Reference(s):