Assiminea ponsonbyi

Assiminea ponsonbyi
Shell of Assiminea ponsonbyi (syntype at the Natural History Museum, London)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Assimineidae
Genus:	Assiminea
Species:	A. ponsonbyi
Binomial name
Assiminea ponsonbyi Morelet, 1889

Assiminea ponsonbyi is a rare species of snail in the family Assimineidae known by the common name Pecos assiminea. ^[1]

Description

The length of the shell attains 4½ mm, its diameter 2 mm.

(Original description in Latin) The shell is imperforate and rather solid. It is smooth, slightly shiny, and olivaceous .

The spire is elongated and sharp. It has six flattened whorls, which are joined by an impressed suture. The body whorl is inflated, faintly angled at the base, and equals half the length of the shell.

The aperture is oblique and pear-shaped. The margins are obtuse and straight, and they are joined by a rather thick, shiny callus. ^[2]

Distribution

This species was found near Port Elizabeth, South Africa.

References

1. Assiminea ponsonbyi Morelet, 1889 . 1 December 2025. Retrieved through: World Register of Marine Species .
2. Morelet, A. (1889). "Coquilles nouvelles de l'Afrique méridionale". Journal de Conchyliologie. 37 (1): 17. Retrieved 1 December 2025. This article incorporates text from this source, which is in the public domain .

• Connolly, M. (1939). A monographic survey of South African non-marine Mollusca. Annals of the South African Museum. 33: 1–660.
• Breure, A.S.H., Audibert, C. & Ablett, J.D. (2018). Pierre Marie Arthur Morelet (1809–1892) and his contributions to malacology. Leiden: Nederlandse Malacologische Vereniging. 544 pp.