Ancilla inornata

Ancilla inornata
Shell of Ancilla inornata (holotype)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Family:	Ancillariidae
Genus:	Ancilla
Species:	A. inornata
Binomial name
Ancilla inornata (E.A. Smith, 1879) [1]
Synonyms
Ancillaria inornataE. A. Smith, 1879 (original combination)

Ancilla inornata is a species of sea snail, a marine gastropod mollusk in the family Ancillariidae. ^[2]

Description

The length of the shell attains 8 mm, its diameter 3 mm.

(Original description) The shell is elongate and acuminately ovate, with a white base faintly tinged with yellow above the suture. It has four whorls coated in a thin enamel. The spire is moderately acute at its apex with slightly convex outlines. The body whorl is indistinctly striated, with two narrow, oblique grooves (sulci) on its lower part. The upper of these grooves is deeper and borders the basal band (balteus). The whorl's extremity is deeply grooved, with three or four oblique folds (plicae) between the grooves. The aperture makes up slightly more than half of the shell's total length, and the basal notch is broad and shallow. ^[3]

Distribution

This marine species occurs off Japan.

References

1. Smith, E.A. (1879b) On a collection of Mollusca from Japan. Proceedings of the Zoological Society of London, 1879, 181–218, pls. 19–20.
2. Ancilla inornata (E.A. Smith, 1879) . Retrieved through: World Register of Marine Species  on 28 April 2010.
3. Smith, E.A. (1879). "On a collection of Mollusca from Japan". Proceedings of the Zoological Society of London. 1879: 217. Retrieved 9 August 2025. This article incorporates text from this source, which is in the public domain .