97 genera are assigned to the class POLYPLACOPHORA
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| NEOLORICATA | Acanthochitona | T | Ol-u | R | |
| NEOLORICATA | Acanthopleura | Q | Plei | R | |
| NEOLORICATA | Acutichiton | C | Serp-l | P | Wc |
| NEOLORICATA | Afossochiton | T | Mi-l | T | Plio |
| NEOLORICATA | Allochiton | J | Hett | J | Sine |
| NEOLORICATA | Amicula | Q | Plei | R | |
| NEOLORICATA | Arcochiton | C | Mosc-l | C | Mosc-u |
| NEOLORICATA | Aulochiton | K | Maes-l | K | Maes-l |
| NEOLORICATA | Austrochiton | T | Mi-m | T | Mi-m |
| NEOLORICATA | Beloplaxus | D | ? | D | ? |
| NEOLORICATA | Callistochiton | T | Mi-l | R | |
| NEOLORICATA | Callochiton | T | Ol-u | R | |
| NEOLORICATA | Camptochiton | C | Mosc-u | C | Mosc-u |
| NEOLORICATA | Chaetopleura | T | Ol-u | R | |
| NEOLORICATA | Chauliochiton | C | Vise | P | Leon-u |
| NEOLORICATA | Chiton | K | Maes-l | R | |
| NEOLORICATA | Colapterochiton | C | Bash | C | Mosc-l |
| NEOLORICATA | Coryssochiton | C | Mosc-u | C | Mosc-u |
| NEOLORICATA | Craspedochiton | T | Ol-l | R | |
| NEOLORICATA | Crenatolorica | Tr | Ladi-u | Tr | Ladi-u |
| NEOLORICATA | Cryptochiton | T | Plio | R | |
| NEOLORICATA | Cryptoconchus | T | Plio | R | |
| NEOLORICATA | Cryptoplax | T | Mi-l | R | |
| NEOLORICATA | Cyanoplax | Q | Plei | R | |
| NEOLORICATA | Cymatochiton | C | Vise | P | Guad |
| NEOLORICATA | Elachychiton | C | Serp-l | C | Serp-l |
| NEOLORICATA | Eudoxochiton | Q | Plei | R | |
| NEOLORICATA | Eulachychiton | C | Serp-l | C | Serp-l |
| NEOLORICATA | Euleptochiton | D | Emsi | D | Emsi |
| NEOLORICATA | Glaphurochiton | C | Bash-u | C | Step-u |
| NEOLORICATA | Glyptochiton | C | Tour | C | Serp |
| NEOLORICATA | Gryphochiton | C | Vise-u | C | Mosc-u |
| NEOLORICATA | Guildingia | T | Mi-l | R | |
| NEOLORICATA | Hanleya | T | Ol-u | R | |
| NEOLORICATA | Helminthochiton | O | Aren | P | Leon-u |
| NEOLORICATA | Heterochiton | J | Sine | J | Sine |
| NEOLORICATA | Ischnochiton | J | Plie-u | R | |
| NEOLORICATA | Katharina | T | Plio | R | |
| NEOLORICATA | Kindbladochiton | O | Aren-l | O | Aren-l |
| NEOLORICATA | Laculina | T | Mi-m | R | |
| NEOLORICATA | Lavenachiton | T | Mi-m | T | Mi-m |
| NEOLORICATA | Lekiskochiton | P | Leon-u | P | Guad-l |
| NEOLORICATA | Lepidochitona | T | Dani | R | |
| NEOLORICATA | Lepidopleurus | T | Eo-m | R | |
| NEOLORICATA | Lepidozona | T | Ng | R | |
| NEOLORICATA | Leptochiton | T | Ol-l | R | |
| NEOLORICATA | Lirachiton | T | Plio-l | R | |
| NEOLORICATA | Llandeilochiton | O | Llde | O | Llde |
| NEOLORICATA | Loboarochiton | C | Tour-l | C | Tour-l |
| NEOLORICATA | Lorica | K | Maes | R | |
| NEOLORICATA | Loricella | T | Mi-l | R | |
| NEOLORICATA | Mesochiton | J | l | J | l |
| NEOLORICATA | Notoplax | T | Mi-l | R | |
| NEOLORICATA | Nuttallina | Q | Plei | R | |
| NEOLORICATA | Ochmazochiton | P | Sakm | P | Leon-u |
| NEOLORICATA | Onithochiton | T | Plio-u | R | |
| NEOLORICATA | Oochiton | T | Mi-m | T | Mi-m |
| NEOLORICATA | Pedanochiton | C | Mosc-u | C | Mosc-u |
| NEOLORICATA | Permochiton | P | ? | P | ? |
| NEOLORICATA | Pileochiton | C | l | C | Mosc-u |
| NEOLORICATA | Placiphorella | Q | Plei | R | |
| NEOLORICATA | Plaxiphora | T | Eo | R | |
| NEOLORICATA | Proleptochiton | C | ? | C | ? |
| NEOLORICATA | Protalochiton | C | l | C | l |
| NEOLORICATA | Protochiton | T | Eo | T | Mi-m |
| NEOLORICATA | Pseudoischnochiton | T | Mi-l | T | Mi-l |
| NEOLORICATA | Pterochiton | C | Tour | P | l |
| NEOLORICATA | Pterygochiton | J | Sine | J | Plie |
| NEOLORICATA | Rhyssoplax | T | Ol-u | R | |
| NEOLORICATA | Schizochiton | T | Mi-l | R | |
| NEOLORICATA | Soleachiton | C | Serp | P | Leon-u |
| NEOLORICATA | Stegochiton | P | Sakm | P | Sakm |
| NEOLORICATA | Stenoplax | T | Eo-m | R | |
| NEOLORICATA | Tonicella | T | Ol-l | R | |
| NEOLORICATA | Tonicia | T | Eo-m | R | |
| NEOLORICATA | Trachypleura | Tr | Anis-l | Tr | Anis-l |
| PALEOLORICATA | Bursata | O | Cara-u | O | Cara-u |
| PALEOLORICATA | Calceochiton | O | Trem | O | Trem |
| PALEOLORICATA | Chelodes | O | Trem-l | D | Gedi-u |
| PALEOLORICATA | Cobcrephora | O | Cara | S | Ludl |
| PALEOLORICATA | Eochelodes | O | Cara | O | Cara |
| PALEOLORICATA | Gotlandochiton | O | Aren | S | Wenl-l |
| PALEOLORICATA | Haeggochiton | K | Camp-l | K | Camp-l |
| PALEOLORICATA | Hawthorneachiton | S | Ludl | S | Ludl |
| PALEOLORICATA | Hemithecella | Cm | Trep-l | O | Trem-l |
| PALEOLORICATA | Ivoechiton | O | Aren | K | Camp-l |
| PALEOLORICATA | Matthevia | Cm | Fran-u | O | Trem-l |
| PALEOLORICATA | Olingechiton | K | Camp-l | K | Camp-l |
| PALEOLORICATA | Paleochiton | O | Aren | O | Aren |
| PALEOLORICATA | Praecanthochiton | Cm | Trep-l | O | Trem-l |
| PALEOLORICATA | Priscochiton | O | Cara-l | O | Cara-u |
| PALEOLORICATA | Probolaeum | D | Eife | D | Eife |
| PALEOLORICATA | Sarkachiton | O | Aren | O | Cara-u |
| PALEOLORICATA | Scanochiton | K | Camp-l | K | Camp-l |
| PALEOLORICATA | Septemchiton | O | Ashg-m | O | Ashg-m |
| PALEOLORICATA | Solenocaris | O | Cara | O | Cara |
| PALEOLORICATA | Spicuchelodes | S | Wenl-u | S | Wenl-u |
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FOP = Period of first occurrence
FOS = Stage of first occurrence
LOP = Period of last occurrence
LOS = Stage of last occurrence
Stage abbreviations follow Sepkoski (2002).