Order
Cucumariidae Ludwig, 1894
List of species
1. Mercedescaudina mostleri Schallreuter, 1975 | Porkuni Stage
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Echinozoa |
| Class | Holothuroidea |
| Subclass | Dendrochirotida |
| Order | Cucumariidae |
| Genus | Mercedescaudina |