|Drawing with an apertural view of the shell of Granigyra tenera|
Cyclostrema tenera Jeffreys 1883
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.
This species occurs in the Atlantic Ocean off Portugal.
- Granigyra tenera (Jeffreys, 1883). Retrieved through: World Register of Marine Species on 26 March 2013.
- G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia (described as Cyclostrema tenera)
- Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213