Cymatium (Gelagna) Schaufuss 1869 (triton shell)
Gastropoda - Sorbeoconcha - Ranellidae
Alternative spelling: Gelagna
Parent taxon: Cymatium according to A. G. Beu 2005
See also Sepkoski 2002
Sister taxa: Cymatium (Cymatium), Cymatium (Gutturnium), Cymatium (Lotoria), Cymatium cecilianum, Cymatium femorale, Cymatium praefemorale, Cymatium revolutum, Lotorium nassariforme
Subtaxa: none
Ecology: epifaunal carnivore
Distribution: found only at Grignon (RSNB collection) (Eocene of France)