Subgenus (Laevidentalium) M. Cossmann, 1888

(8-0-1-0-1-3-2-11-13-0-0-0-0)
Ref. Abbott, 1974 p 386
[see also as Subgenus under Genus Fustiaria]
[see also as Genus]

Shell: The shell is of a medium-size with a slight curvature.
It is smooth even at the posterior end except for faintly visible growth lines.
There is a short notch in the simple posterior end.
It is oval to round in cross-section.

callipeplum W. H. Dall, 1889

(8-0-1-0-1-3-2-11-13-1-0-0-0)
Glory-of-the-Atlantic Tusk
Ref. Abbott, 1974 p 386

incertum G. P. Deshayes, 1825 [T]

(8-0-1-0-1-3-2-11-13-2-0-0-0)
Ref. Abbott, 1974 p 386
[=Laevidentalium incertum (G. P. Deshayes, 1825)]
Ref. Habe, 1964 p 34

perlongum W. H. Dall, 1881

(8-0-1-0-1-3-2-11-13-3-0-0-0)
Very Slender Tusk
Ref. Abbott, 1974 p 386

rectius P. P. Carpenter, 1864

(8-0-1-0-1-3-2-11-13-4-0-0-0)
Western Straight Tusk
[see also Dentalium (Laevidentalium) watsoni H. A. Pilsbry & B. Sharp, 1897]
Ref. Abbott, 1974 p 387 bw ?

? splendida (G. B. Sowerby, 1832)

(8-0-1-0-1-3-2-11-13-5-0-0-0)
Syn. Dentalium (Dentalium) fissura G. B. Sowerby, 1860
[notJ. B. P. A. de Lamarck, 1818]
Ref. Keen, 1971 p 888

toyamaense T. Kuroda & Kikuchi, 1933

(8-0-1-0-1-3-2-11-13-6-0-0-0)
[=Laevidentalium toyamaense (T. Kuroda & Kikuchi, 1933)]
Ref. Habe, 1964 p 36 bw

watsoni H. A. Pilsbry & B. Sharp, 1897

(8-0-1-0-1-3-2-11-13-7-0-0-0)
[=Dentalium (Laevidentalium) rectius P. P. Carpenter, 1864]
[extra long variation]
Ref. Abbott, 1974 p 387