The shell has 4–6
whorls, while the
apex of the shell is usually eroded. The aperture is continuous and the apertural
lip is simple. There are seven or more (up to 12) basal cords (spiral
sculptures at the base of the
body whorl). The average height of the shell is . Mineral composition of the shell of this species is as follows: 52.9%
CaO, 0.77%
SiO2, 0.36%
Na2O, 0.06%
Al2O3, 0.05%
Fe2O3, 0.01%
MgO and 0.01%
P2O5. There is 45.44% of
citrulline of free amino acids (amino acids in blood). Ko
et al. (2001) described the radula of this species in detail. The shape of the operculum is ovate and the profile of the shape of the operculum is flat. There is no penis. The diploid
chromosome number of
Semisulcospira libertina is 2n=36. The complete
mitochondrial genome of
Semisulcospira libertina is known since 2015. Its length is 15,432
bp. It was the first mitochondrial genome resolved within the whole superfamily
Cerithioidea.
Semisulcospira reiniana is very similar species: its embryos are larger and embryos are with ribs, adult shells are more slender,
2n=40. File:Semisulcospira libertina shell 2.png|Drawing of an apertural view of a shell of
Semisulcospira libertina. File:Semisulcospira libertina shell 3.png|Drawing of a lateral view of a shell of
Semisulcospira libertina. File:Semisulcospira libertina operculum.png|Drawing of an operculum of
Semisulcospira libertina. File:Semisulcospira libertina radula.png|Drawing of
radular teeth of
Semisulcospira libertina == Ecology ==