Shell small, diameter between 0.2 and 0.4 mm, planispiral, brilliant, with uniform dark brown colour except near the aperture, which is pale brown. Protoconch , of 3/4 whorl, with a prominent cord with several smaller cords at each side, crossed by very fine axial striae which are more evident on the external part. Teleoconch between 1 and 1 1/2 whorls, with a sculpture of very prominent elongated tubercles, in numbering between 13 to 17 on the first whorl. Between them are fine growth striae. The periphery is uniformly rounded, smooth, and with only very fine growth striae.
Etymology. The specific name refers to the latin names minor and talis for its very small size even unusual for the genus.

Only A japonica Habe, 1972 is superficially similar but it has very constant spiral striae. A rota (Forbes & Hanley, 1853) has a similar teleoconch but its protoconch (see RODRIGUEZ-BABIO & THIRIOT-QUIEVREUX. 1974, as A fischeriana) is very different.