After Grande, 1987, Nelson, 1994, and Grande & de Pinna, 1998

<==o Siluriformes [Nematognathi] (catfishes; monnikalat)
   |?- †Siluriformes genera et species indet. U. Cret. Ind. [Cione & Prasad, 2002]
   |?- †Vorishia vulpes U. Cret. NA.
   |--o Diplomystidae [Diplomystoidei] (alkumonnit)
   |  `--o Diplomystes [Olivaichthys] [N: 4] [FB: 6]
   |     |-- D. camposensis Arratia, 1987
   |     |-- D. chilensis (Molina, 1782) (Tollo)
   |     |-- D. cuyanus Ringuelet, 1965
   |     |-- D. mesembrinus Ringuelet, 1982
   |     |-- D. nahuelbutaensis Arratia, 1987
   |     `-- D. viedmensis MacDonagh, 1931 [Olivaichthys] (Otuno)
   `--o Siluroidei sensu Grande, 1987
      |--o †Hypsidorus Lundberg & Case, 1970 [Hypsidoroidea Grande, 1987: Hypsidoridae Grande, 1987]
      |  |-- †H. farsonensis Lundberg & Case, 1970
      |  `-- †H. oregonensis Grande & de Pinna, 1998
      `--o Siluroidea
         |?- Lacantunia enigmatica Rodiles-Hernández, Hendrickson, Lundberg & Humphries, 2005 [Lacantuniidae Rodiles-Hernández, Hendrickson, Lundberg & Humphries, 2005]
         |-- Ictaluridae [incl. Ameiuridae] (piikkimonnit) [7/46]
         `--+?- †Bachmania chubutensis Dolgopol de Saez, 1949; Eoc. SA
            |?- †Hoffstetterichthys pucai Gayet
            |?- †Incaichthys suarezi Gayet
            |?-o †Andinichthyidae
            |  `-- †Antinichthys bolivianensis Gayet
            |--+== Bagridae [Porcidae, Mystidae] (juovamonnit) [paraphyletic?]
            |  |-- Cranoglanis bouderius (Richardson, 1846) [Cranoglanididae] (kuonomonnit; Armorhead catfishes)
            |  `--o Olyra [Olyridae] (viirimonnit) [4 recent species]
            |     |-- O. burmanica Day, 1872 (Longtail catfish)
            |     |-- O. horai (Prashad & Mukerji, 1929)
            |     |-- O. kempi Chaudhuri, 1912
            |     `-- O. longicaudata McClelland, 1842
            |-- Siluridae (monnit) [Nelson: 12 recent genera, 100 species] [FB: 12/80]
            |--+-- Schilbeidae
            |  `-- Pangasiidae (haimonnit; shark catfishes) [N: 2/21] [FB: 2/24]
            |-- Amphiliidae (imuevämonnit)
            |--o Sisoridae sensu Nelson, 1994 (koskimonnit)
            |  |-- Erethistidae [5/6]
            |  `-- Sisoridae [Bagariidae] (koskimonnit) [Nelson: 20 genera, 85 species] [Fishbase: 17/108]
            |-- Amblycipitidae (sukkulamonnit; Torrent catfishes)
            |-- Akysidae (jokimonnit; stream catfishes)
            |--o Parakysis [Parakysidae] [N: 2] [FB: 4]
            |  |-- P. anomalopteryx Roberts, 1989
            |  |-- P. grandis Ng & Lim, 1995
            |  |-- P. longirostris Ng & Lim, 1995
            |  `-- P. verrucosus Herre, 1940
            |--o Chaca [Chacidae] (kitamonnit; Squarehead or angler catfish) [3]
            |  |-- C. bankanensis Bleeker, 1852 (Angler catfish)
            |  |-- C. burmensis Brown & Ferraris, 1988
            |  `-- C. chaca (Hamilton, 1822) (Squarehead catfish)
            |-- Clariidae [incl. Uegitglanididae] (ankeriasmonnit, keuhkomonnit, konnamonnit; airbreathing catfishes) [13 recent genera, 100 species]
            |--o Heteropneustes [Heteropneustidae [Saccobranchidae]] (keuhkomonnit)
            |  |-- H. fossilis (Bloch, 1794) (Stinging catfish)
            |  `-- H. microps (Günther, 1864)
            |--o Malapterurus [Malapteruridae] [7]
            |  |-- M. cavalliensis Roberts, 2000
            |  |-- M. electricus (Gmelin, 1789) (sähkömonni, sähkösäkiä; Electric catfish)
            |  |-- M. leonensis Roberts, 2000
            |  |-- M. microstoma Poll & Gosse, 1969 (kongonsähkömonni; Smallmouth electric catfish) 
            |  |-- M. minjiriya Sagua, 1987
            |  |-- M. monsembeensis Roberts, 2000
            |  `-- M. shirensis Roberts, 2000
            |--o “Arioidea” (merimonnit; sea catfishes)
            |  |-- Ariidae [Tachysuridae, Doiichthyidae] (merimonnit) [14 recent genera, 120 species]
            |  |-- Plotosidae (korallimonnit) [N: 9/32] [FB: 10/31]
            |  `-- Mochokidae [Synodontidae] (ripsimonnit) [Nelson: 10 genera/167 species] [FB: 7/180]
            |--o “Auchenipteroidea” (nahkamonnimaiset monnit)
            |  |-- Doradidae (okamonnit) [35 genera, 90 species]
            |  `-- Auchenipteridae sensu Ferraris, 2003 [Froese & Pauly, 2004] [incl. Ageneiosidae] (nahkamonnit)
            |--o “Pimelodoidea” [Pimelodidae sensu lato?]
            |  |-- Heptapteridae
            |  `-- Pimelodidae (antennimonnit)
            |--o Cetopsidae sensu Froese & Pauly 2001 (valasmonnit)
            |  |--o Helogenes [Helogeneidae] (pehmeäevämonnit) [4]
            |  |  |-- H. castaneus (Dahl, 1960)
            |  |  |-- H. gouldingi Vari & Ortega, 1986
            |  |  |-- H. marmoratus Günther, 1863
            |  |  `-- H. uruyensis Fernández-Yépez, 1967
            |  `-- Cetopsidae sensu Nelson, 1994 (valasmonnit; whalelike catfishes) [N: 4/12] [FB: 6/19]
            |--o Hypopthalmus [Hypopthalmidae] (alasilmämonnit) [2-3]
            |  |-- H. sp.1
            |  |-- H. sp.2
            |  `-- H. sp.3
            |-- Aspredinidae [Bunocephalidae] (banjomonnit)
            `-- Loricarioidea (panssari- ja imumonnit)

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