Planaxis (Supplanaxis) (cerith snail)
Gastropoda - Cerithioidea - Acanthonematidae
Alternative spelling: Supplanaxis
Parent taxon: Planaxis according to N. E. Weisbord 1962
See also Sepkoski 2002
Sister taxa: Planaxis africana, Planaxis brasilianus, Planaxis decollatus, Planaxis sulcatus
Subtaxa: none
Ecology: epifaunal grazer
Distribution: found only at Locality D, Venezuela - Weisbord (1964) (Quaternary of Venezuela)