†Agladrillia (Agladrillia) callothyra, W. P. Woodring 1928 Agladrillia callothyra is an extinct species of sea snail, a marine gastropod mollusk in the family Drilliidae[1] It is the type species of the genus Agladrillia.

[1] (Original description) The shell is small and moderately slender, with a nucleus consisting of about two whorls.

The sculpture features narrow axial ribs, between which lie broad spiral bands separated by narrow grooves.

The anal fasciole has a swelling adjacent to the suture, which is crudely undulated by obscure prolongations of the axial ribs.

[2] This extinct marine species was found in Pliocene strata on Jamaica.