After Froese & Pauly, 2001

<==o Craterocephalus ()? [25]
   |-- C. amniculus Crowley & Ivantsoff, 1990
   |-- C. capreoli Rendahl, 1922 (Rendahl's hardyhead)
   |-- C. centralis Crowley & Ivantsoff, 1990
   |-- C. cuneiceps Whitley, 1944 (Murchison river hardyhead)
   |-- C. dalhousiensis Ivantsoff & Glover, 1974 (Dalhousie hardyhead)
   |-- C. eyresii (Steindachner, 1883) (Lake Eyre hardyhead)
   |-- C. fistularis Crowley, Ivantsoff & Allen, 1995
   |-- C. fluviatilis McCulloch, 1912 (Murray hardyhead)
   |-- C. gloveri Crowley & Ivantsoff, 1990 (Glovers hardyhead)
   |-- C. helenae Ivantsoff, Crowley & Allen, 1987 (Drysdale hardyhead)
   |-- C. honoriae (Ogilby, 1912) (Estuarine hardyhead
   |-- C. kailolae Ivantsoff, Crowley & Allen, 1987 (Kailola's hardyhead)
   |-- C. lacustris Trewavas, 1940 (Kutubu hardyhead
   |-- C. lentiginosus Ivantsoff, Crowley & Allen, 1987 (Prince Regent hardyhead)
   |-- C. marianae Ivantsoff, Crowley & Allen, 1987 (Magela hardyhead)
   |-- C. marjoriae Whitley, 1948 (Marjorie's hardyhead)
   |-- C. mugiloides (McCulloch, 1912) (Spotted hardyhead)
   |-- C. munroi Crowley & Ivantsoff, 1988
   |-- C. nouhuysi (Weber, 1910) (Mountain hardyhead)
   |-- C. pauciradiatus (Günther, 1861)
   |-- C. pimatuae Crowley, Ivantsoff & Allen, 1991 (Pima hardyhead)
   |-- C. randi Nichols & Raven, 1934 (Kubuna hardyhead)
   |--o C. stercusmuscarum (Günther, 1867) (Fly-specked hardyhead)
   |  |-- C. s. fulvus Ivantsoff, Crowley & Allen, 1987
   |  `-- C. s. stercusmuscarum (Günther, 1867) (Fly-specked hardyhead)
   `-- C. stramineus (Whitley, 1950) (Strawman)

Reference(s):