After Tschopp, Mateus & Benson, 2015 (reduced to species)

<==o †Diplodocidae Marsh, 1884 [non Janensch, 1929b]
   |--o †Apatosaurinae
   |  |-- †“Atlantosaurusimmanis Marsh, 1878a
   |  `--+-- AMNH 460
   |     `--+--o †Apatosaurus Marsh, 1877b; L.Jur. WNAm.
   |        |  |-- †A. ajax Marsh, 1877b
   |        |  `--+-- †A. sp. [LACM 52844]
   |        |     `-- †A. louisae Holland, 1915b [incl. A. laticollis Marsh, 1879a]
   |        `--o †Brontosaurus Marsh, 1879c sensu Tschopp, Mateus & Benson, 2015 L.Jur. WNAm. (brontosaurus; jymylisko)
   |           |-- †B. excelsus Marsh, 1879c [Brontosaurus amplus  Marsh, 1881b; Apatosaurus excelsus (Marsh, 1879c)]
   |           `--+-- †B. sp. [FMNH P25112]
   |              `--+-- †B. yahnahpin (Filla & Redman, 1994) [Apatosaurus yahnahpin Filla & Redman, 1994; Eobrontosaurus yahnahpin (Filla & Redman, 1994) Bakker, 1998] L.Jur. WNAm.
   |                 `-- †B. parvus (Peterson & Gilmore, 1902) [Brontosaurus excelsus Marsh, 1879c; Apatosaurus excelsus (Marsh, 1879c) (in partem); ;Elosaurus parvus Peterson & Gilmore, 1902]
   `--o †Diplodocinae Marsh, 1884 sensu Janensch, 1929b
      |--+-- †Diplodocidae genera et species indet. [SMA 0087]
      |  `-- †Diplodocidae genera et species indet. [WDC-FS001A]
      `--+--  †Tornieria africana (Fraas, 1908) Sternfeld, 1911 [Gigantosaurus africanus Fraas, 1908; Tornieria africana (Fraas) Sternfeld, 1911; Barosaurus africanus (Fraas) Janensch, 1922]; L.Jur. EAf.
         `--+--o  †Supersaurus Jensen, 1985b sensu Tschopp, Mateus & Benson, 2015
            |  |-- †S. lourinhanensis (Bonaparte & Mateus, 1999) [Dinheirosaurus lourinhanensis Bonaparte & Mateus, 1999] L.Jur. SWEu.
            |  `--+-- †S. bohetii (Remes, 2007) Tschopp, Mateus & Benson, 2015 [Australodocus bohetii Remes, 2007] L.Jur. EAf.
            |     `-- †S. vivianae Jensen, 1985b [Ultrasauros macintoshi Jensen, 1985b]; L.Jur. WNAm.
            `--+-- †Leinkupal laticauda Gallina, Apesteguía, Haluza &: Canale, 2014  E.Cret. WSAm.
               `--+--o †Galeamopus Tschopp, Mateus & Benson, 2015
                  |  |-- †G. sp. [AMNH 969]
                  |  `--+-- †G. sp. [USNM 2673]
                  |     `-- †G. hayi (Holland, 1924b) Tschopp, Mateus & Benson, 2015 [Diplodocus hayi Holland, 1924b] L.Jur. WNAm.
                  `--+--o †Diplodocus Marsh, 1878b [incl. Seismosaurus Gillette, 1991] L.Jur. WNAm.
                     |  |-- †D. longus Marsh, 1878b
                     |  |-- †D. carnegii Hatcher, 1901
                     |  `-- †D. hallorum (Gillette, 1991) [Seismosaurus halli Gillette, 1991; Seismosaurus hallorum Olshevsky; Diplodocus hallorum Lucas, Spielman, Rinehart, Heckert, Herne, Hunt, Foster, & Sullivan, 2006; Diplodocus hallorum (Gillette, 1991) Tschopp, Mateus & Benson, 2015] L.Jur. WNAm.
                     `--+-- †Diplodocidae genera et species indet. [CM 3452]
                        `--+-- †Kaatedocus siberi Tschopp & Mateus, 2012 L.Jur. WNAm.
                           `--o †Barosaurus Marsh, 1890 [?= Gigantosaurus Fraas, 1908] L.Jur. WNAm. EAf.
                              |-- †B. sp. [AMNH 7535]
                              `--+-- †B. sp. [CM 11984]
                                 `-- †B. lentus Marsh, 1890

Diplodocidae incertae sedis:

    †“Apatosaurusminimus [AMNH 675]
    †Atlantosaurus montanus (Marsh, 1877) Marsh, 1877 [Titanosaurus montanus Marsh, 1877] (nomen dubium) L.Jur. WNAm.
    †Barosaurus affinis Marsh, 1899 [basal diplodocoid sensu Tschopp et al., 2015]
    †Barosaurus gracilis Janensch, 1961
    †Cetiosauriscus longus (Owen, 1842b) Huene, 1927
    †Cetiosauriscus greppini (Huene, 1922) Huene, 1927
    †Diplodocus lacustris Marsh, 1884d [YPM 1922; CM 11161; USNM 2672]
    †Dystylosaurus edwini Jensen, 1985b [BYU 4503]; L.Jur. WNAm. (= Supersaurus vivianae)
    †Dystrophaenus viaemalae Cope, 1877b [USNM 2364] L.Jur. WNAm.
    CM 11255
    SMA O25-8
    md Diplodocinae (mdD)

After Tschopp, Mateus & Benson, 2015 (includind specimen numbers)

<==o †Diplodocidae
   |--o †Apatosaurinae
   |  |--o †“Atlantosaurusimmanis
   |  |  |-- YMP 1840 (type)
   |  |  `-- NSMT-PV 20375
   |  `--+-- AMNH 460
   |     `--+--o †Apatosaurus
   |        |  |-- †A. ajax [YPM 1860]
   |        |  `--+-- LACM 52844
   |        |     `--o †A. louisae
   |        |        |-- A. louisae type
   |        |        |-- YPM 1861 [A. laticollis]
   |        |        `-- CM 3378
   |        `--o †Brontosaurus
   |           |--o †B. excelsus
   |           |  |-- YPM 1980
   |           |  `-- YPM 1981
   |           `--+-- FMNH P25112
   |              `--+-- †B. yahnahpin [Tate-001]
   |                 `--o †B. parvus
   |                    |-- CM 566
   |                    `--+-- UW 15556
   |                       `-- BYU 1252-18531
   `--o †Diplodocinae
      |--+-- SMA 0087
      |  `-- WDC-FS001A
      `--+--o  †Tornieria africana
         |  |-- type
         |  `-- MB.R. skeleton k
         `--+--o  †Supersaurus
            |  |-- †S. lourinhanensis [ML 414]
            |  `--+-- †Australodocus bohetii [type]
            |     `--o †S. vivianae
            |        |-- BYU+
            |        `-- WDC DMJ-021
            `--+-- †Leinkupal laticauda [MMCH-Pv 63-1]
               `--+--o †Galeamopus
                  |  |-- AMNH 969
                  |  `--+-- USNM 2673
                  |     `--o †G. hayi
                  |        |-- ML 418
                  |        `-- HMNS 175
                  `--+--o †Diplodocus
                     |  |-- †D. longus [YPM 1920]
                     |  |--o †D. carnegii Hatcher, 1901
                     |  |  |-- CM 84
                     |  |  `-- CM 94
                     |  `--o †D. hallorum
                     |     |-- AMNH 223
                     |     `--+-- NMMNH 3690 [type]
                     |        `--+-- DMNS 1494
                     |           `-- USNM 10865
                     `--+-- CM 3452
                        `--+--o †Barosaurus
                           |  |-- AMNH 7535
                           |  `--+-- CM 11984
                           |     `--o †B. lentus
                           |        |-- AMNH 6341
                           |        `-- YPM 429
                           `--o †Kaatedocus siberi
                              |-- SMA 0004
                              `--+-- AMNH 7530
                                 `-- SMA D16-3)

Reference(s):

  • Tschopp, E., Mateus, O. & Benson, R. B. J., 2015: A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda).
    –PeerJ: Vol. 3, pp. e857 [doi: 10.7717/peerj.857]

After Gallina, Apesteguía, Haluza &: Canale, 2014

<==o †Diplodocidae
   |--+-- †Dinheirosaurus
   |  `-- †Supersaurus
   `--+-- †Apatosaurus
      `--o †Diplodocinae
         |--+-- †Leinkupal
         |  `-- †Tornieria
         `--+-- †Kaatedocus
            `--+-- †Barosaurus
               `-- †Diplodocus

After Remes, 2006

<==o †Diplodocidae
   |-- †Suuwassea
   |-- †Apatosaurus
   `--o †Diplodocinae
      |-- †Tornieria
      `--+-- †Barosaurus
         `-- †Diplodocus

After McIntosh, 1990, and Upchurch, 1998

<==o †Diplodocidae
   |-- †Cetiosauriscus
   |--o †Apatosaurinae
   |  |-- †Eobrontosaurus
   |  `-- †Apatosaurus
   `--o †Diplodocinae
      |-- †Barosaurus
      |-- †Diplodocus
      `--+?- †Dystylosaurus
         |?- †Dystrophaenus
         |-- †Seismosaurus
         `-- †Supersaurus

Reference(s):