Tiberia micalii: Only two fragmentary specimens were found, but these are quite characteristic. The complete shell probably had an elongated oblong shape, with a relatively high last whorl. Colour cream, with a narrow yellow-brown spiral band just above the periphery. Embryonic whorls planorbid, of type B, diameter about 450 fim. Only a few weakly convex teleoconch whorls are known. Suture impressed. Growth-lines orthocline to slightly prosocline. There is no particular microsculpture. Outer lip rather straight. Umbilicus narrow but deep. On the columella two teeth can be seen, but both fragments are broken at the lower columellar part.
Nomenclature.— Although Pefias & Rolan (1997: 37) describe two columellar teeth (their figure even shows three), they place their species in Sayella Dall, 1885. However, in species of that genus, hitherto known only from eastern North America, there is only one moderately prominent fold on the columella.
Because of the three columellar teeth, the smooth, banded whorls, and the form of the umbilicus, we place this species in Tiberia. It differs from T. minuscula and related forms by its prominent teeth and the much more slender and oval form.
Depth range — 39-42 m.