Fusiturricula humerosa
Species of gastropod
From Wikipedia, the free encyclopedia
Fusiturricula humerosa is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.[1]
| Fusiturricula humerosa | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Drilliidae |
| Genus: | Fusiturricula |
| Species: | †F. humerosa |
| Binomial name | |
| †Fusiturricula humerosa (Gabb, 1873) | |
| Synonyms[1] | |
|
† Turris (Surcula) humerosa Gabb, 1873 superseded combination | |
Description
The size of an adult shell varies between 19 mm and 47 mm.
(Original description) 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. [2]
Distribution
This species occurs in the demersal zone of the Caribbean Sea off Jamaica, the Dominican Republic and Venezuela
It has also been found as a fossil in Miocene to Pliocene strata of the Gurabo Formation (Dominican Republic); age range: 7.246 to 3.6 Ma [3]
