Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Ordo: †Pachycormiformes
Familiae:
†Ichthyodectidae –
†Pachycormidae
Genera inc. sedis:
†Ankylophorus –
†Asthenocormus –
†Austropleuropholis –
†Baleiichthys –
†Bobbichthys –
†Chirocentrites –
†Clupavus –
†Domeykos –
†Elpistoichthys –
†Eubiodectes –
†Eugnathides –
†Eurycormus –
†Eurystichthys –
†Euthynotus –
†Flugopterus –
†Hengnania –
†Hungkiichthys –
†Ichthyokentema –
†Leptolepides –
†Ligulella –
†Luisichthys –
†Luisiella –
†Mesoclupea –
†Neopachycormus –
†Neopholidophoropsis –
†Occithrissops –
†Oreochima –
†Orthocormus –
†Parapholidophorus –
†Parapleuropholis –
†Pholidoctenus –
†Pholidolepis –
†Pholidophoretes –
†Pholidophoristion –
†Pholidophoropsis –
†Pholidorhynchodon –
†Proleptolepis –
†Prosauropsis –
†Protoclupea –
†Prymnetes –
†Saurostomus –
†Seefeldia –
†Spathiurus –
†Todiltia –
†Varasichthys