Contributed by Andrew Smith, August 2011
[?=Tiarotrophus Pomel, 1883, p. 82, type species Cyphosoma schlumbereri Cotteau, 1864; =Orthocyphus Arnaud, 1896, p. 234, type species Cyphosoma pulchellum Cotteau, 1864.
Cenchritechinus Lambert, 1911, was established as a subgenus.]
|Distribution||Upper Cretaceous, North Africa.|
|Type||Cyphosoma said Peron & Gauthier, in Cotteau, Peron & Gauthier 1881, by subsequent designation of Lambert & Thiery, 1911, p. 214.|
|Species Included||Lambert & Thiery (1911) included a large number of species, but only those with strong sexual dimorphism should probably be included. Pomel (1883) included only Cyphosoma ioudi Peron & Gauthier, 1881 in addition to the genotype.
Tiarotrophus schlumbergi (Cotteau, 1864) probably belongs here.
|Classification and/or Status||Uncertain|
|Remarks||The diadematoid plate compounding, imperforate, crenulate tuberculation and strong sexual dimorphism with brood pouches makes this an immediately recognizable genus. However its higher relationships remain problematic and it is left unclassified for the moment. Probably close to Plistophyma (which has very similar tuberculation and plate compounding), but with a fixed apical disc.
Cotteau, G. Peron, A. & Gauthier, V. 1881. Echinides fossiles de l\'Algerie. septieme fascicule. Etage Senonien. G. Masson, Paris, 197 pp., 20 pls.
Pomel, A. 1883. Classification methodique et genera des echinides vivants & fossiles. Thesis presentes a la faculte des sciences naturelles, Academie de Paris. Alger, A. Jourdan.