Contributed by Andrew Smith, August 2011
| Distribution | Jurassic-Cretaceous, Europe |
|---|---|
| Type | No type or included species were specified by Duncan in his description |
| Classification and/or Status | Nomen nudum (no included species). |
| Remarks | The name was proposed as a replacement for Plesiodiadema Duncan, 1885, p. 433 (non Plesiodiadema Pomel, 1883). As no species were included when the genus was established it is a nomen nudum. Duncan, P. M. 1889. A revision of the genera and great groups of the Echinoidea. Journal of the Linnean Society, London 23, 1-311. |