37 genera are assigned to the class TERGOMYA
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| CYRTONELLIDA | Cornuella | Cm | Trep | Cm | Trep |
| CYRTONELLIDA | Cyclocyrtonella | S | u | S | u |
| CYRTONELLIDA | Cyrtolites | O | Llde | S | Wenl |
| CYRTONELLIDA | Cyrtonella | S | ? | D | Give |
| CYRTONELLIDA | Cyrtonellopsis | O | Trem-l | O | Llvi |
| CYRTONELLIDA | Gasconadeoconus | O | Trem | O | Trem |
| CYRTONELLIDA | Oriostoma | O | Cara-l | D | Give |
| CYRTONELLIDA | Pollicina | O | Aren-u | O | Aren-u |
| CYRTONELLIDA | Procarinaria | S | u | S | u |
| CYRTONELLIDA | Protoconus | Cm | Tomm-u | Cm | Tomm-u |
| CYRTONELLIDA | Sinuitella | O | Trem | O | Trem |
| CYRTONELLIDA | Sinuitopsis | O | Llvi | O | Ashg |
| CYRTONELLIDA | Tetamocornu | Cm | Dres-u | Cm | Trep |
| CYRTONELLIDA | Trigyra | O | Llde | O | Llde |
| CYRTONELLIDA | Yochelsonia | S | u | S | u |
| HYPSELOCONIDA | Archaeoconus | Cm | Trep | Cm | Trep |
| HYPSELOCONIDA | Cambrioconus | Cm | Trep | Cm | Trep |
| HYPSELOCONIDA | Hypseloconus | Cm | Dres-l | O | Trem |
| HYPSELOCONIDA | Kirengella | Cm | uMid | O | Trem |
| HYPSELOCONIDA | Knightoconus | Cm | Fran-l | Cm | Fran-l |
| HYPSELOCONIDA | Ozarkoconus | Cm | Dres-u | O | Trem |
| HYPSELOCONIDA | Shelbyoceras | Cm | uMid | O | Trem-u |
| HYPSELOCONIDA | Yochelsonella | O | l | O | l |
| TRYBLIDIIDA | Archaeophiala | O | Ashg-l | O | Ashg-u |
| TRYBLIDIIDA | Archaeopraga | S | Prid | S | Prid |
| TRYBLIDIIDA | Bipulvina | O | Trem | O | Trem |
| TRYBLIDIIDA | Drahomira | S | Prid | S | Prid |
| TRYBLIDIIDA | Ellsworthoconus | Cm | u | Cm | u |
| TRYBLIDIIDA | Helcionopsis | Cm | lMid | O | Ashg-m |
| TRYBLIDIIDA | Kalbyella | Cm | Atda-u | Cm | mMid-u |
| TRYBLIDIIDA | Micropileus | O | m | O | m |
| TRYBLIDIIDA | Micropilina | Q | Plei | Q | Plei |
| TRYBLIDIIDA | Pilina | O | Ashg-m | S | Wenl |
| TRYBLIDIIDA | Propilina | Cm | Dres-u | O | Aren |
| TRYBLIDIIDA | Romaniella | O | Trem | O | Trem |
| TRYBLIDIIDA | Tryblidium | O | Cara-l | S | Wenl |
| TRYBLIDIIDA | Vallatotheca | Cm | lMid | O | Ashg-m |
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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).