PaleoDB taxon number: 35631
Synonyms: Cassandra White and Moy-Thomas 1940 (no. 394629), Leptosomus Marck 1863 (no. 368086)
Parent taxon: Actinopterygii according to A. S. Woodward 1901
Sister taxa: Actinopteri, Aeduelliformes, Aesopichthyidae, Aetheospondyli, Aetheretmon, Aethocephalichthys, Akanolepis, Ameghinichthys, Anapterus, Aneurolepis, Apateodus, Asarotiformes, Atkinsonella, Aulolepis, Australichthys, Avonichthys, Baoqingichthys, Beagiascus, Bobastraniiformes, Cenechoia paramillensis, Cenechoia sulcata, Cheirodopsis, Chirothrix, Cladistia, Ctenothrissa, Cuneognathus, Dactylopogon, Dinopteryx, Diplospondichthys, Echidnocephalus, Enchelurus, Eurynotus uspallatensis, Eurypoma, Exocoetoides, Guaymayenia, Gunterichthys, Gyrolepidoides cuyanus, Halecopsis, Histiothrissa, Isospondyli, Kalops, Lepidotus pectoralis, Lepidotus trotti, Limnomis, Lineagruan, Mallotus, Meemania, Mesolepis, Microcoelia, Neochallaia leonensis, Ophiopsis lariensis, Opistopteryx, Pachylebias, Palaeonisci, Palaeoniscimorpha, Palaeoniscoidae, Palaeoniscoidea, Paramblypteriformes, Parascopelus, Paratarrasius, Pholidophorus dentatus, Pholidophorus lepturus, Pholidophorus rueppelli, Pholidophorus vallejensis, Plethodus, Polypteri, Prolebias, Pronotacanthus, Protaulopsis, Protospondyli, Pseudoberyx, Reticulolepis, Rhinellus, Rhynchorhinus, Roslerichthys, Salmo, Schizospondylus, Semionotus brevis, Semionotus dubius, Semionotus inornatus, Semionotus mendozaensis, Semionotus unicristatus, Semionotus vallejensis, Spinofacia, Stegotrachelus, Tarrasiiformes, Telepholis, Terenolepis, Tetragonopterus, Thryptodus, Wardichthys
Subtaxa: Leptosomus elongatus, Leptosomus guestphalicus, Leptosomus macrourus, Leptosomus minima, Sardinioides attenuatus, Sardinioides crassicaudus, Sardinioides illustrans, Sardinioides megapterus, Sardinioides monasteri, Sardinioides pusillus
Ecology: