Granigyra tenera

Granigyra tenera is a species of sea snail, a marine gastropod mollusk, unassigned in the superfamily Seguenzioidea.

Description
The shell grows to a height of 1.8 mm. The thin shell is narrowly umbilicated. It is semitransparent, lustreless, with nearly microscopic spiral stride, which are wanting on the base and replaced by a rugose or fretted appearance. The color of the shell is pale yellowish white, with a faint greenish tinge. The four whorls are convex. The suture is very deep. The aperture is circular. The thin peristome is slightly expanded.

Distribution
This species occurs in the Atlantic Ocean off Portugal.