Amphicyclotus texturatus

Amphicyclotus texturatus
Shell of Amphicyclotus texturatus (specimen at Naturalis Biodiversity Center)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Architaenioglossa
Superfamily:	Cyclophoroidea
Family:	Neocyclotidae
Genus:	Amphicyclotus
Species:	A. texturatus
Binomial name
Amphicyclotus texturatus (G. B. Sowerby I, 1850)
Synonyms
Cyclostoma texturatumG. B. Sowerby I, 1850 ·

Amphicyclotus texturatus is a species of tropical land snails with gills and an operculum, terrestrial gastropod mollusks in the family Neocyclotidae. ^[1]

Subspecies

• Amphicyclotus texturatus goldfussi(O. Boettger, 1892)
• Amphicyclotus texturatus spiralisF. G. Thompson, 1969
• Amphicyclotus texturatus texturatus(G. B. Sowerby I, 1850)

Description

The height of the shell attains 18 mm, its diameter 41 mm.

(Original description in French) The shell is broadly umbilicate, depressed, and quite solid, despite being moderately thick. It is adorned with an elegant network of undulating, branching, and confluent longitudinal folds.

The shell's base color is whitish, beneath a thin, persistent, pellicle-like, olivaceous-tawny periostracum.

The spire is very briefly conical, terminating in an obtuse, purplish-pink apex. The suture is deeply impressed and slightly concave. There are five convex, rapidly expanding whorls, with the body whorl rounded. The aperture is nearly vertical, subcircular, and bluish-white internally. The peristome is simple, straight, of the same colour with the aperture, and barely subangular at the superior margin. The margins are joined by a thin, bluish-white callus deposit. The columellar margin is slightly thickened and arched, the basal margin is rounded, and the outer margin is thin and nearly sharp, with the upper margin almost horizontal.

The operculum is thin, somewhat flattened, and cartilaginous-corneous. The outer surface consists of numerous distinct whorls, the last of which terminates abruptly, tightly coiled towards the slightly concave central region, and is corneous in color.

The inner surface is glossy and corneous-tawny, convex centrally, featuring an obtuse, flattened mammilla. Distant, faint concentric striae are visible, blending, through transparency, with the outer spiral system. ^[2]

Distribution

This species was found in Guatemala and in the state Oaxaca, Mexico. ^[3]

References

1. Amphicyclotus texturatus (G. B. Sowerby I, 1850) . 22 March 2025. Retrieved through: World Register of Marine Species .
2. Fischer, Paul, - Crosse, Hippolyte, - Milne-Edwards, H. (Henri) (1900). Études sur les mollusques terrestres et fluviatales du Mexique et du Guatemala. Vol. 2. Paris: Imprimerie impériale. p. 145. Retrieved 22 March 2025. This article incorporates text from this source, which is in the public domain .
3. Kobelt, W. (1902). Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen. 16. Lieferung. Mollusca. Cyclophoridae. Das Tierreich. XXXIX. Berlin: R. Friedländer. p. 254. Retrieved 19 March 2025.

• Sowerby, G.B. I (1850). Descriptions of some additional species of Cyclostoma. In G. B. Sowerby II (ed.), Thesaurus conchyliorum, or monographs of genera of shells. Vol. 2 (11). London: privately published. p. 160. Retrieved 22 March 2025.
• Thompson, F.G. (2011). "An annotated checklist and bibliography of the land and freshwater snails of México and Central America". Florida Museum of Natural History Bulletin. 50 (1): 1–299. doi:10.58782/flmnh.bnej7351.