Alternative spelling: Selacha
Parent taxon: Neoselachii according to J. A. Long 2011
See also Andrews 1906, Applegate 1970, Case 1904, Case 1978, Case 1979, Case and Schwimmer 1988, Eastman 1904, Ebersole et al. 2019, Ebersole et al. 2024, Fedorowski 1912, Gadow 1898, Gunnell 1933, Hay 1902, Herman 1977, Jaekel 1911, Jordan 1963, Kumar and Loyal 1987, Nelson et al. 2016, Säve-Söderbergh 1934, Sykes 1971, Thurmond and Jones 1981 and Woodward 1916
Sister taxa: Agaleidae, Anachronistidae, Batoidea, Batomorphii, Dalatiiformes, Duffinselache, Galea, Galeomorphii, Grozonodon, Hopleacanthus, Mcmurdodontidae, Nanocetorhinus, Odontorhytis, Ostenoselachidae, Palaeocarcharidae, Rhomaleodus, Squalea, Squalomorphii, Squatinomorphii, Synechodontiformes, Vallisodus
Subtaxa: Anacoracoidei Asterospondyli Centrobati Cooperodon Ctenacanthoidei Fortscottella Galeomorphi Hammondella Heterodontoidea Idiacanthus Kirkella Moreyella Notidani Notidanidae Notidanoidei Palaeosquali Rajae Rhinae Rhinoraji Scyllidae Spinacidi Squali Squalimorphi Statodonti Tectospondyli Trirostri Trygonidae