Angustassiminea californica

Angustassiminea californica
Shell of Angustassiminea californica (specimen at the Natural History Museum, Rotterdam)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Assimineidae
Genus:	Angustassiminea
Species:	A. californica
Binomial name
Angustassiminea californica (Tryon, 1865)
Synonyms [1]
List Assiminea californicaJ. G. Cooper, 1872(Non Tryon, 1865) Assiminea californica(Tryon, 1865) Cingula californica(Tryon, 1865) Hydrobia californicaTryon, 1865 Syncera magdalenensisBartsch, 1920 junior subjective synonym

Angustassiminea californica is a species of small operculate snail, a terrestrial gastropod mollusk or micromollusk in the family Assimineidae. ^[1]

Description

The length of the shell attains 6.3 mm.

(Original description) The shell is turbinated (top-shaped) and has a dark horn color. It is covered by an epidermis that is minutely striated and polished. The umbilical region is not perforate. It consists of six rather convex whorls. The spire is elevated, with an acute apex. The suture is well impressed. The aperture is moderate and ovate. The operculum is thin, shining, and dark brown. ^[2]

Distribution

This species has been found in brackish waters in California, USA.

References

1. Angustassiminea californica(Tryon, 1865) . 4 December 2025. Retrieved through: World Register of Marine Species .
2. Tryon, G.W. (1865). "Descriptions of new species of Amnicola, Pomatiopsis, Somatogyrus, Gabbia, Hydrobia and Rissoa". American Journal of Conchology. 1: 221. Retrieved 4 December 2025. This article incorporates text from this source, which is in the public domain .

External links

• Cooper, J.G. (1872). "On new Californian Pulmonata, etc". Proceedings of the Academy of Natural Sciences of Philadelphia. 24: 153. Retrieved 4 December 2025.
• Bartsch, P. (1920). "The west American mollusks of the families Rissoellidae and Synceratidae, and the rissoid genus Barleeia". Proceedings of the United States National Museum. 58 (2331): 159–176. Retrieved 4 December 2025.
• Hallan A. & Fukuda H. (2015). "Taiwanassiminea phantasma n. sp.: a terrestrial assimineid (Caenogastropoda: Truncatelloidea) from Middle Osborn Island, Kimberley,Western Australia". Molluscan Research.