Tridonta (Rictocyma)
Bivalvia - Carditida - Astartidae
Alternative spelling: Rictocyma
Parent taxon: Tridonta according to L. R. Cox et al. 1969
See also Sepkoski 2002
Sister taxon: Tridonta (Nicania)
Subtaxa: none
Distribution: there are no occurrences of Tridonta (Rictocyma) in the database