3 genera are assigned to the class TUNICATA
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| uncertain | Cystodytes | T | Eo-l | R | |
| uncertain | Micraseites | T | Eo-m-l | R | |
| uncertain | Permosoma | P | Leon-u | P | Leon-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).