Eulima perspicua is a taxonomic junior synonym for a species of very small, parasitic sea snail, a marine gastropod mollusk in the family Eulimidae. The currently accepted scientific name for this species is Melanella perspicua (G.B. Sowerby II, 1834).
Taxonomy and Nomenclature The species was originally described as Eulima perspicua by G.B. Sowerby II in 1834. Over time, as taxonomic understanding evolved, particularly within the diverse and often complex family Eulimidae, the species was reclassified. The genus Eulima has been a historical dumping ground for many eulimid species, and subsequent revisions have moved many of these to more appropriate genera, such as Melanella. Therefore, Eulima perspicua is now considered an obsolete name, and Melanella perspicua is the valid and accepted name in current scientific literature and databases, such as the World Register of Marine Species (WoRMS).
Description Melanella perspicua typically possesses a small, slender, and conical shell, which is often translucent or white. The shell is smooth and polished, characteristic of many species within the Eulimidae family. Its delicate appearance belies its parasitic lifestyle.
Habitat and Ecology Like other members of the Eulimidae family, Melanella perspicua is an ectoparasite. These snails live on the external surface of or sometimes within the tissues of echinoderms, such as sea cucumbers (Holothuroidea), sea urchins (Echinoidea), or starfish (Asteroidea). They feed by piercing the host's body wall with their proboscis and sucking out bodily fluids. The relationship is often highly specific, with certain snail species specializing on particular host echinoderms.
Distribution Melanella perspicua is known to inhabit marine environments in the Indo-Pacific region. Its distribution includes areas such as the Philippines, Japan, Indonesia, the East China Sea, and parts of Australia. The presence of the snail is naturally linked to the distribution of its specific echinoderm hosts.