After Bi, Jin, Li & Du, 2015, and Rougier, Davis & Novacek, 2015, with genera and species from McKenna & Bell, 1997, Rougier, Wible & Novacek, 1998, Averianov, 2000, Kielan-Jaworowska, Novacek, Trofimov & Dashzeveg, 2000, Kielan-Jaworowska & Cifelli, 2001, and Rougier, Davis & Novacek, 2015

<==o †Deltatheroida Kielan-Jaworowska, 1982 [taxonomic history]
   `--o †Deltatheridiidae Gregory & Simpson, 1926 [taxonomic history]
      |--o †Sulestes Nesov, 1985; U.Cret. Eas. [Deltatherus Nessov, 1997; Marsasia Nesov, 1997] [Sulestinae Nessov, 1985b]
      |  |?- ?†S. sp. [Marsasia sp. Averianov & Kielan-Jaworowska, 1999; = Paranyctoides aralensis Nessov, 1993 (Archibald & Averianov, 2005)]
      |  |-- †S. sp. [Central Asia]
      |  `-- †S. karakshi Nesov, 1985 [Deltatheroides kizylkumensis Nessov, 1993; Deltatherus kizylkumensis (Nessov) Nessov, 1997; Marsasia aenigma Nesov, 1997]
      `--+--o †Oklatheridium Davis, Cifelli & Kielan-Jaworowska, 2008
         |  |-- †O. szalayi Davis, Cifelli & Kielan-Jaworowska, 2008
         |  `-- †O. minax Davis & Cifelli, 2011
         `--+-- †Tsagandelta dashzevegi Rougier, Davis & Novacek, 2015
            `--+-- †Lotheridium mengi Bi, Jin, Li & Du, 2015
               `--+--+-- †Atokatheridium boreni Kielan-Jaworowska & Cifelli, 2001
                  |  `-- †Nanocuris improvida Fox, Scott & Bryant, 2007
                  `--+--o †Deltatheridium Gregory & Simpson, 1926; U.Cret. EAs.
                     |  |-- †D. pretrituberculare Gregory & Simpson, 1926 [†D. p. pretrituberculare and †D. p. tardum]
                     |  `-- †D. nessovi Averianov, 1997
                     `--o †Deltatheroides Gregory & Simpson, 1926: U.Cret. EAs. ?NA. [Deltatheroididae Kielan-Jaworowska & Nesov, 1990]
                        |-- †D. cretacicus Gregory & Simpson, 1926
                        `-- †D. sp.

Deltatheroida incertae sedis:

Khuduklestes bohlini Nesov, Sigogneau-Russell & Russell, 1994; Cret. As.
    †Beleutinus orlovi Bazhanov, 1972 [is a zalambdalestid?]
    †Falepterus barwini Clemens & Lillegraven, 1986 [see basal Theria]
    †“Deltatheroides” kizylkumensis Nesov, 1993
    †Oxlestes grandis Nesov, 1982; U.Cret. As. [a zhelestid? ]

After Bi, Jin, Li & Du, 2015

<==o †Deltatheroida
   `--o †Deltatheridiidae
      |-- †Sulestes
      `--+-- †Oklatheridium
         `--+-- †Tsagandelta
            `--+-- †Lotheridium
               `--+--+-- †Atokatheridium
                  |  `-- †Nanocuris
                  `--+-- †Deltatheridium
                     `-- †Deltatheroides

After Rougier, Davis & Novacek, 2015

<==o †Deltatheroida
   `--o †Deltatheridiidae
      |--+-- †Sulestes
      |  `-- †Oklatheridium
      `--+-- †Tsagandelta
         `--+--+-- †Atokatheridium
            |  `-- †Nanocuris
            `--+-- †Deltatheridium
               `-- †Deltatheroides

Reference(s):

 

Special thanks to:

Jos H. M. Dols, for gathering additional information and species.