After Luo, Cifelli & Kielan-Jaworowska, 2001, Luo, Kielan-Jaworowska & Cifelli, 2002, Rauhut, Martin, Ortiz-Jaureguizar & Puerta, 2002, and Kielan-Jaworowska, Cifelli & Luo, 2004

<==o Australophenida Luo, Cifelli & Kielan-Jaworowska, 2001 [incl. Monotremata and Ausktribosphenida]
   |-- †Asfaltomylos patagonicus Rauhut, Martin, Ortiz-Jaureguizar & Puerta, 2002
   `--+-- †Ambondro mahabo Flynn, Parrish, Rakotosamimanana, Simpson & Wyss, 1999
      `--+--o †Ausktribosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
         |  `--o †Ausktribosphenidae Rich, Vickers-Rich, Constantine, Flannety, Kool, van Klaveren, 1997
         |     |?- †Bishops whitmorei Rich, Flannery, Trusler, Kool, van Klaveren & Vickers-Rich, 2001
         |     `-- †Ausktribosphenos nyktos Rich, Vickers-Rich, Constantine, Flannety, Kool, van Klaveren, 1997
         `--o Monotremata C.L. Bonaparte, 1837 sensu Luo, Cifelli & Kielan-Jaworowska, 2001 [Prototheria Gill] (nokkaeläimet) [Incl. Tachyglossidae??]
            |?- †Kollikodon ritchiei Flannery, Archer, Rich & Jones, 1995 [Kollikodontidae Flannery, Archer, Rich & Jones, 1995]
            |--o Platypoda Gill, 1872
            |  `--o Ornithorhynchidae Gray, 1825 [incl. Steropodontidae Archer, Flannery, Ritchie & Molnar, 1985] (platypuses; vesinokkaeläimet)
            |     |-- †Teinolophos trusleri Rich, Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1999; E.Cret. S.Aust.
            |     `--+-- †Monotrematum sudamericanum Pascual, Archer, Ortiz Jaureguizar, Prado, Godthelp & Hand, 1992 in Augee et al., 1992; E.Pal. SAm.
            |        `--+-- †Steropodon galmani Archer, Flannery, Ritchie & Molnar, 1985; L.Cret. Aust.
            |           `--+--o †Obdurodon Woodburne & Tedford, 1975
            |              |  |-- †O. insignis Woodburne & Tedford, 1975
            |              |  `-- †O. dicksoni Archer, Jenkins, Hand, Murray & Godthelp, 1992
            |              `--o Ornithorhynchus Blumenbach, 1800 [taxonomic history]
            |                 |-- †O. maximus [taxonomic history]
            |                 `-- O. anatinus (Shaw, 1799) Blumenbach, 1800 (platypus; vesinokkaeläin) [taxonomic history]
            `--o Tachyglossa Gill, 1872
               |?- †Kryoryctes cadburyi Pridmore, Rich, Vickers-Rich & Gambaryan, 2005
               `--o Tachyglossidae Gill, 1872 (echidnas; nokkasiilit)
                  |--o Tachyglossus aculeatus (Shaw, 1792) ("lyhytnokkasiili") [taxonomic history]
                  |  |-- T. a. aculaetus (Shaw, 1792) ("lyhytnokkasiili")
                  |  `-- T. a. setosus (Geoffroy, 1803) ("tasmanianlyhytnokkasiili")
                  `--o Zaglossus Gill, 1877 [taxonomic history]
                     |?- †Z. owenii [taxonomic history]
                     |-- †Z. ramsayi Owen, 1884 [taxonomic history]
                     |-- †Z. robusta Dun, 1895 [taxonomic history]
                     |?- †Z. hacketti (Glauert, 1914)
                     |?- †Z. harrisoni Scott & Lord, 1922
                     |?- †Z. robustus
                     |-- Z. attenboroughi Flannery & Groves, 1998
                     |-- Z. bartoni
                     `-- Z. bruijni (Peters & Doria, 1876) ("pitkänokkasiili") [taxonomic history]

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