Calliostoma scurra is a species of marine gastropod mollusk in the family Calliostomatidae. Members of this family are commonly referred to as top snails or top shells due to the conical shape of their shells. The species was scientifically described and named by the American malacologist William Healey Dall in 1889.
Taxonomy
The species is classified within the genus Calliostoma, which is characterized by shells with a nacreous (pearly) interior and often intricate spiral sculpturing. The name Calliostoma is derived from the Greek words kallos (beautiful) and stoma (mouth). The specific epithet scurra is a Latin term for "buffoon" or "jester," although the specific reason for this designation in the original description is not clarified.
Morphology
The shell of Calliostoma scurra is typically small, often measuring between 7 mm and 10 mm in height. It possesses a strictly conical profile with approximately seven whorls. The shell surface is generally described as white, pale, or translucent, with a polished or slightly iridescent luster. The sculpture of the shell consists of fine spiral threads or ridges, and the aperture (the opening of the shell) is sub-quadrate in shape with a pearly interior.
Distribution and Habitat
Calliostoma scurra is native to the Western Atlantic Ocean. Its range includes the waters of the Gulf of Mexico, the Caribbean Sea, and the Straits of Florida. It is categorized as a deep-water species, typically recovered from depths ranging from 150 to over 400 meters. Due to its deep-sea habitat, live specimens are rarely observed, and much of the known data is derived from shells collected during deep-sea dredging expeditions.
Ecology and Behavior
[Insufficient Encyclopedic Information] While members of the genus Calliostoma are generally known to be specialized feeders—often consuming hydroids, bryozoans, or other colonial invertebrates—there is currently no specific data available regarding the diet, reproductive habits, or life expectancy of Calliostoma scurra. Its ecological role within deep-water benthic communities remains largely unstudied.