Menesthella is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of very small sea snail

Snail

Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...

s, pyramidellid

Pyramidellidae

Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs or micromolluscs....

 gastropod mollusks, or micromollusk

Micromollusk

A micromollusk is a descriptive term for a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also reach adult size at very small...

s. This genus is currently placed in the subfamily Chrysallidinae

Chrysallidinae

Chrysallidinae is a taxonomic group of very small sea snails in the family Pyramidellidae.- Taxonomy :Chrysallidinae has been one of eleven recognized subfamilies of the gastropod family Pyramidellidae...

 of the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Odostomiidae. It was originally described as a subgenus of Menestho

Menestho

Menestho is a genus of very small sea snails, pyramidellid gastropod mollusks, or micromollusks. -Shell description:The original description by Möller is brief and in Latin: "Animal pede elongato, angusto; ore simplici, membrana linguali destituto; tentaculis brevioribus, crassiusculis, oculos...

 Möller, 1842 but was erected to genus status by Schander et al. 1999.

Shell description

The shell is small, broadly conical and imperforate. The surface is marked by strong, equally spaced spiral chords and by fine axial growth-lines seen between the sutures. The peripery of the last whorl is sulcate and the base is smooth. The columella fold (tooth) is strong.

Life habits

Little is known about the biology of the members of this genus. As is true of most members of the Pyramidellidae

Pyramidellidae

Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs or micromolluscs....

 sensu lato, they are most likely to be ectoparasites.

Species

Species within the genus Menesthella include:

• Menesthella tarukiensis (Nomura, 1939) (Type species) (as Menestho tarukiensis)
• ...