« This family may be defined as including all Dentalioida with a conical foot and shells with longitudinal sculpture. » – C. P. Palmer: “A Supraspecific Classification of the Scaphopod Mollusca”, The veliger vol.17(2), Berkeley 1974, p.117.
Antalis H. & A. Adams, 1854:
There are always some weak longitudinal ribs, at least on the posterior half.
