- Benthofascis biconica, Benthofascis biconica;Bathytoma biconica Hedley, 1903
- Habromorula biconica, Rough Castor Bean;Morula biconica;Spinidrupa biconica;Engina slootsi De Jong and Coomans, 1988;Morula ambusta Dall, 1923;Ricinula chrysostoma Reeve, 1846;Ricinula biconica Blainville, 1832
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