Platysiagidae Temporal range: Early Triassic–Early Jurassic PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Subclass:	Neopterygii
Order:	†Platysiagiformes
Family:	†Platysiagidae Brough, 1939

Platysiagidae is an extinct family of stem-neopterygian ray-finned fish which lived from the Early Triassic to the Early Jurassic. It includes the genera Helmolepis, Platysiagum and possibly Caelatichthys.^[1] The family was formerly placed within the paraphyletic order Perleidiformes, but it is now considered to belong to the separate, monotypic order Platysiagiformes.^[2]

v t e Neopterygii
Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Actinopterygii Clade: Actinopteri Actinopterygii see Actinopterygii Neopterygii see below↓ Neopterygii
Neopterygii †Besania †Boreichthys †Caelatichthys †Cephaloxenus †Chrotichthys †Dollopterus †Frodoichthys †Gimlichthys †Habroichthys †Hulettia †Pristisomus †Tungusichthys †Venusichthys †Zeuchthiscus †Bobasatraniiformes? †Guildayichthyidae? †Pholidopleuriformes? Arctosomus Australosomus Gracilignathichthys Macroaethes Pholidopleurus †Redfieldiiformes? Atopocephala Brookvalia Calaichthys Cionichthys Daedalichthys Denwoodichthys Dictyopyge Endemichthys Geitonichthys Helichthys Hiascoactinus Ischnolepis Lasalichthys Leighiscus Mauritanichthys Molybdichthys Pacorichthys Phlyctaenichthys Redfieldius Sakamenichthys Schizurichthys Sinkiangichthys? †Platysiagidae Caelatichthys? Helmolepis Platysiagum †Polzbergiiformes Hydropessum? Cleithrolepididae Cleithrolepidina Cleithrolepis Polzbergiidae Felberia Luopingichthys? Polzbergia Serrolepis Stoppania †Colobodontidae Chaohuperleidus? Colobodus Crenilepis Dactylolepis? Engycolobodus? Feroxichthys Gabanellia? Nephrotus? †Perleididae Aetheodontus? Alvinia? Chaohuperleidus? Ctenognathichthys? Daninia Diandongperleidus? Dipteronotus? Endennia? Eoperleidus Fuyuanperleidus? Luopingperleidus? Manlietta Megaperleidus? Meidiichthys Meridensia? Moradebrichthys? Paraperleidus Peltoperleidus? Perleidus Plesiofuro? Plesioperleidus Procheirichthys? Teffichthys? Tripelta †Louwoichthyiformes Peltoperleidus? Louwoichthyidae Ctenognathichthys? Louwoichthys Luopingichthys? Pseudobeaconiidae Anatoia Caminchaia Dipteronotus? Echentaia Mendocinichthys Pasambaya Pseudobeaconia †Luganoiiformes Altisolepis? Fuyuanperleidus? Luganoia †Peltopleuriformes Habroichthys? Peltopleuridae Altisolepis? Nannolepis Peltopleurus Placopleurus Thoracopteridae Gigantopterus Italopterus Peripeltopleurus Potanichthys Thoracopterus Wushaichthys †Dapediidae Aetheolepis Dandya Dapedium Hemicalypterus Heterostrophus Paradapedium Sargodon Scopulipiscis Tetragonolepis †Pycnodontiformes see Pycnodontiformes Holostei Ginglymodi see Ginglymodi includes gars Halecomorphi see Halecomorphi includes bowfin Teleostei see Teleostei includes the majority of modern fish