Anxietas perplexa is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). Anxietas perplexa Iredale, 1917. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492305 on 2013-04-14
Description The shell measures approximately 1.5 mm in height and 1 mm in breadth.
(Original description) The shell is minute and conical, with a flattened apex, rounded sides, and a flattened base. It is almost entirely unsculptured and has a somewhat quadrangular aperture with thin, sharp edges. The colour is a pale brownish yellow, with a darker line marking the sutures.
The shell contains fve whorls. The apical two form a flattened, planate protoconch, while the succeeding three descend rather rapidly but remain tightly coiled, with no umbilicus. On the base of the body whorl, just below the periphery, there are a couple of closely spaced, incised lines. Apart from these, little sculpture is present. A similar incised line occurs above the periphery, running parallel to the suture on each of the three post-nuclear whorls.
The columella is simple and erect, though slightly curved, and the aperture is oblique with thin margins.
Distribution This marine species occurs off Christmas Island.
References
External links World Register of Marine Species Australian Faunal Directory: Anxietas perplexa