Dentalium tetraschistum Watson, 1879, [Basis of the current name] Range: 10°N to 36°S; 60°W to 32.4°W Depth: 20 to 120 m Maximum Reported Size: 10 mm Distribution: Venezuela; Brazil: Amapa, Para, Maranhao, Ceara, Fernando de Noronha, Rio Grande do Norte, Rio de Janeiro, Sao Paulo, Rio Grande do Sul; Uruguay; Argentina: Buenos Aires References: Rios (1975) E; Rios (1985) DdNSWM
Cadulus quadridentatus Dall, 1881, [Synonym] Range: 34°N to 21°N; 89.7°W to 64.8°W Depth: 5.5 to 91 m Maximum Reported Size: 10.2 mm Distribution: USA: North Carolina; Florida: East Florida, West Florida; Mexico: Campeche Bank, Quintana Roo; Bermuda, Puerto Rico References: Rice & Kornicker (1965) W; Rios (1975) s; Vokes & Vokes (1983) SM