Family † Crossognathidae Woodward 1901, name in prevailing recent practice

†Pelecorapidae Cragin 1901: 30 (family) † Pelecorapis Cope 1875 [Hay 1929: 734 selected †Pelecorapidae over †Syllaemidae, confirmed by Fowler 1973: 296; family name sometimes seen as †Pelycorapidae]

†Syllaemidae Cragin 1901: 25 (family) † Syllaemus Cope 1875

† Crossognathidae Woodward 1901: 348 (family) † Crossognathus Pictet 1858

†Apsopelicidae Romer 1966: 354 (family) † Apsopelix Cope 1871 [name only, published after 1960, not available, Art. 13.1.1]