Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis/Superclassis: 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