Fusiturricula humerosa
Fusiturricula humerosa is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Description
The size of an adult shell varies between 19 mm and 47 mm.The shell is elongate fusiform, featuring a high, turriculated spire. It comprises ten prominent whorls that are angulated on the sides and broadly and deeply concave above. The suture is bordered by a thickened line. The body whorl is broad in the middle, concave above, and narrows convexly below, becoming suddenly constricted at the base. Beyond this constriction, a long, slender, straight siphonal canal projects.
The surface is marked by revolving ribs that show more or less tendency to alternate in size; above the angle, these ribs are smaller and more uniform. On the angle, a series of flattened tubercles is present, numbering about a dozen per whorl. The aperture is wide and bi-angular above, narrowing towards the front. The inner lip is only faintly encrusted. The sinus is deep, oblique, and positioned between the suture and the angle of the whorl.
Distribution
This species occurs in the demersal zone of the Caribbean Sea off Jamaica, the Dominican Republic and VenezuelaIt has also been found as a fossil in Miocene to Pliocene strata of the Gurabo Formation ; age range: 7.246 to 3.6 Ma