Liotina crassibasis is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.

The upper whorls and half the last one are flattened at the top, and scarcely slope at all.

The lines of growth are elevated, excessively close together, and cover the entire surface of the shell, being continuous upon the keels and lirae and in the interstices between them.

The plicae are somewhat acuminately produced upon the upper carina, which, when viewed from above, presents a prettily festooned appearance.

Between this thickening and the lower keel the whorl is a little constricted or concave, especially so towards the mouth.