| author | date | title | journal / publication | Stimpson W | 1858 | Pars I. Turbellaria Dendrocoela. | Proc Acad Natural Sci Phila 9:19-31 |
|---|
| Placocephalus fuscatum (Stimpson, 1858) | w | primary taxonomic authority (describer) | ||
| Placocephalus virgatum (Stimpson, 1858) | w | primary taxonomic authority (describer) | ||
| Geoplaninae Geoplanini Stimpson, 1858 | - | primary taxonomic authority (describer) |