Microdrillia circumvertens is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.WoRMS (2015). Microdrillia circumvertens (Melvill & Standen, 1901). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://marinespecies.org/aphia.php/aphia.php?p=taxdetails&id=434400 on 2016-03-14
Description The height of the small, milky-white shell attains 6 mm, its width 2.25 mm. It has an ovate-fusiform shape, containing 8 whorls. The body whorl is bicarinate. It is a highly spirally carinate and lirate species. The short canal and wide sinus proclaim it rightly placed in Microdrillia and the acute carinae are peculiar. The aperture is oblique and oblong, with the columella containing no plications.Melvill & Standen (1901) Mollusks from the Persian Gulf and Arabian Sea; Proceedings of the Zoological Society of London. v. 2, 1901
Distribution This marine species occurs from the Gulf of Oman to Transkei, South Africa
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