2 genera are assigned to the phylum NEMERTINA
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| uncertain | Archisymplectes | C | Serp-l | C | Mosc-u |
| uncertain | incertae sedis | J | Tith-l | J | Tith-l |
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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).