The Echinoid Directory
Contributed by Andrew Smith, August 2011
Pomeliosoma Vadet, 2005, p. 136
| Diagnostic Features | According to Vadet (2005), dstinguished from Pliocyphosoma by its better developed secondary tubercles. |
|---|---|
| Distribution | Upper Jurassic (Kimmeridgian-Tithonian), western Europe. |
| Name gender | neuter |
| Type | Cyphosoma legayi Rigaux, 1882 by original designation. |
| Species Included | Two other species were included, Cyphosoma duplicatum Cotteau, 1885, and Pseudodiadema frasii Desor, 1856. |
| Classification and/or Status | Phymosomatoida, Unnamed family. Subjective junior synonym of Pliocyphosoma Pomel, 1883 |
| Remarks | Pomelosoma has identical ambulacral plate compounding to Pliocyphosoma but was differentiated by Vadet from that taxon in having two subequal interambulacral tubercles on ambital interambulacral plates. The type illustrated by Cotteau (1875, 1883) however has only a single primary tubercle. Cotteau, G. 1883. Paleontologie francaise. Terrain Jurassique Tome X (2) Echinides reguliers. G. Masson, Paris. Vadet, A. 2005. Echinides fossiles du Boulonnais: Du Bajocien au Tithonien. Phymosomatoida, Stomechinoida, Arbacioida. Annales de la Societe d'Histoire Naturelle du Boulonnais 4(2), 110-156. |