“Genus TRACTOLIRA, Dall.
Shell slender, drawn out in its coil, fusiform, with a short canal and pervious axis; outer lip simple, not expanded or lirate; body not callous, the axis twisted, with a single strong plait at its anterior edge, the young showing five or more narrow, low, thread-like ridges behind the one above mentioned, but which become obsolete in the adult.
This singular shell appears to be a degenerate abyssal form of Volutidae, but which can not be assigned to any of the genera yet established.
Type.—T. sparta, Dall.”
(Dall, 1896: 12)
Tractolira is a genus of sea snails, marine gastropod mollusks in the family Volutidae.[1]
Species within the genus Tractolira include:
