Coralliophila richardi (P. Fischer, 1882)
Gulf of Mexico, Bahamas, Bay of Biscay, Mediterranean. Predator on sessile preys, from the upper slope to bathyal depths. Original taxon: Murex richardi. Synonym: lactuca Dall.
 
The shell is very globose, rather smooth, umbilicate at adult stage. Protoconch I granulated; protoconch II adorned with 3 spiral rows of radial scales. Teleoconch: whorls convex, with a marked subsutural ramp; sculpture made up of about ten sharp axial folds, crossed by a same number (on the last whorl) of primary spiral beads (6 on average whorl), the subsutural one being the stronger and giving the whorl a kind of carinate appearance; microsculpture made up of thin commarginal growth marks crossed by the small secondary spirals.

Subadult specimen (not yet umbilicate) from 350m deep, Málaga, Andalucia, S. Spain. 11mm. Original pictures provided by A. Nappo (IT) – (CC BY-NC-SA).
Coralliophila lactuca in W. H. Dall: “Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey steamer ‘Blake’, Lieut.-Commander C. D. Sigsbee, U. S. N., and Commander J. R. Bartlett, U. S. N., commanding. XXIX. Report on the mollusca. Part II. Gastropoda and Scaphopoda”, Bulletin of the Museum of Comparative Zoology at Harvard College vol.18, Cambridge 1889, plate XVI.
Dead adult specimen (umbilicate) from 600m deep, isola Gorgona, off Livorno, Toscana, W. Italy. 21mm. An element of the cold water coral Desmophyllum pertusum (Linnaeus, 1758) is fixed on the last whorl. Original pictures provided by A. Nappo (IT) – (CC BY-NC-SA).
Specimens collected at about 365m deep, Fernandina Beach, Nassau County, NE. Florida. Original pictures provided by the Bailey-Matthews National Shell Museum, Florida.
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