Description: Shell small, solid, fusiform, almost biconical. Protoconch smooth and shiny, coloured from pink to brown, with a nucleus of about 110 µm and a diameter of about 480 um. Teleoconch usually with 4-4,5 whorls bearing a coarse sculpture of axial ribs and spiral cords. There are about 12 ribs on the first whorl, 14-17 on the second and 20-28 on the last one. There are three ribs on the first whorls and on the last, about 14-16 more from the end of the spire. Aperture narrow and elongate axially, columella a little undulating with two small teeth; on the inner part of the external lip, there are about 10 teeth, the second one larger and prominent. The colour is cream on the upper part of the shell, with an isolated brown rectangle on the suture and darker below; towards the base it is light again with small brown rectangles on the spiral cords.
Dimensions: Holotype is 4.7 mm.

Mitromorpha snarezi spec, nov. has some similarity to M. hernandezi in the pattern and colouration but they can obviously be distinguished: M hernandezi has a slightly smaller shell, its colour is lighter with yellowish on the upper part of the whorls; the protoconch is a little narrower.
Mitromorpha saotomensis (Rolan & Boyer, 2001) has a similar shape, a darker shell, being more densely sculptured. It could be considered a variation, but in the same place where M. suarezi was collected, there is also a population of the typical M. saotomensis living sympatrically without intergradations. This population is more similar to that of Sao Tome only being a little smaller. In ROLAN& BOYER (2001; figs.33-34) also were represented shells from Principe I. (Bara das Agulhas). In this last species the presence of tubercles on the protoconch was noticed several times. This could not be shown in M. suarezi but perhaps the protoconchs studied were a little eroded.

Tinhosa Pequena, Principe Island.