16. Scaphander watsoni Dall, 1881

Distribution. Brazil, Colombia, Cuba, Guadeloupe, Mexico, Panama, USA, Venezuela (Abbott 1974; Marcus 1977; Massemin et al. 2009; Rios 2009; Rosenberg 2009; Eilertsen & Malaquias 2013. Los Testigos: Marcus & Marcus 1967b; Marcus 1974; Macsotay & Campos 2001).

Remarks. No material of this species was found.