Anatoma richardi

Anatoma richardi
Shell of Anatoma richardi (holotype)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Lepetellida
Superfamily:	Scissurelloidea
Family:	Anatomidae
Genus:	Anatoma
Species:	A. richardi
Binomial name
Anatoma richardi (Dautzenberg & H. Fischer, 1896)
Synonyms [1]
Scissurella richardiDautzenberg & H. Fischer, 1896 Scissurella umbilicata var. depressaLocard, 1898

Anatoma richardi is a species of small sea snail, a marine gastropod mollusc or micromollusc in the family Anatomidae. ^[1]

This species was treated by D.L. Geiger (2012) as a synonym of Anatoma tenuis (Jeffreys, 1877) but this was rebutted by Ortega & Gofas (2019). ^[1]

Description

The length of the shell attains 2 2/5 mm, its diameter 3 1/5 mm.

(Original description in French) The shell is very thin and fragile. Its depressed spire comprises four low, rapidly enlarging whorls, which are slightly convex above and adorned with numerous, regular, slender longitudinal ribs. The upper part of the body whorl also features fine decurrent cords that, with the ribs, form a delicate and fine network. The body whorl is very large, deeply convex at the base, and profoundly umbilicated.

The fissural band, situated at the base of the whorls, is partially covered by the suture in the upper whorls. It is furnished with arched folds and limited above and below by prominent, lamellar edges. The fissure is very deep.

The aperture is very large and flared. The columella is arched and provided with a lamella that reflects over the umbilicus. The outer lip is arched, sharp, angular, emarginate, and rostrate at the point where the fissure terminates. The shell's coloration is a subhyaline white. ^[2]

Distribution

This marine species occurs in the Atlantic Ocean off The Azores

References

1. Anatoma richardi (Dautzenberg & H. Fischer, 1896) . 25 July 2025. Retrieved through: World Register of Marine Species .
2. Dautzenberg, P.; Fischer, H. (1896). "Dragages effectués par l'Hirondelle et par la Princesse Alice 1888-1895. 1. Mollusques Gastéropodes". Mémoires de la Société Zoologique de France. 9: 487. Retrieved 24 July 2025. This article incorporates text from this source, which is in the public domain .

• Geiger, D.L. (2012). Monograph of the little slit shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae. pp. 729-1291. Santa Barbara Museum of Natural History Monographs. Number 7.

External links

• Locard, A. (1897–1898). Expéditions scientifiques du Travailleur et du Talisman pendant les années 1880, 1881, 1882 et 1883. Mollusques testacés (vol.2 ed.). Paris: Masson. p. 69. Retrieved 24 July 2025.
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). "Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification" (PDF). Patrimoines Naturels. 50.
• Ortega, J.; Gofas, S. (2019). "The unknown bathyal of the Canaries: new species and new records of deep-sea Mollusca" (PDF). Zoosystema. 41 (26): 518–519. doi:10.5252/zoosystema2019v41a26.
• Gofas, S.; Luque, Á. A.; Templado, J.; Salas, C. (2017). "A national checklist of marine Mollusca in Spanish waters". Scientia Marina. 81 (2): 241–254. Bibcode:2017ScMar..81..241G. doi:10.3989/scimar.04543.21a.
• Pisani Burnay, L.; Rolan, E. (1990). "The family Scissurellidae in the Cape Verde Islands (Prosobranchia: Archaeogastropoda)". Archiv für Molluskenkunde. 120 (1–3): 31–45. Bibcode:1990ArMol.120...31P. doi:10.1127/arch.moll/120/1990/31. (note: treted as a junior synonym of Anatoma crispata )