The taxonomy of the uncoiling “worm-snails” belonging to the marine gastropod families Vermetidae, Siliquariidae and Turritellidae is notoriously confused and their nominal species frequently mixed (in the literature as well as in type specimen collections) with members of superficially similar tube-building polychaete worms or members of unrelated molluscan groups. A long history of introducing and using infrasubspecific names and the rampant employment of homonymous names for unrelated taxa had contributed to a system that became unworkable. The current catalogue researches nearly 1,500 names that have been cited in conjunction with Recent and fossil taxa worm-snail taxonomy (six names above family-group level, 18 family-group names, 195 genus-group names, 1,278 species-group names). Each name’s validity and availability (in the sense of the I.C.Z.N. Code) was investigated and current placement within or outside the mentioned worm-snail families is suggested. 560 species-group names are interpreted as available for members of the worm-snail groups here under discussion. Of these, approximately 280 species-group names are available for extant taxa. Various formal First-Reviser actions are taken to resolve priority issues. The type species for
Tulaxoda Blainville, 1828 is herein designated to be
Serpulorbis polyphragma Sasso, 1827, making
Tulaxoda an objective junior synonym of
Thylacodes Guettard, 1770.
Magilus Montfort, 1810 is declared a nomen protectum over
Campulotus Guettard, 1770, a nomen oblitum. Recurring nomenclatural issues and those too complex to treat within the regular catalogue entries are discussed in 22 taxa notes. The catalogue is fully referenced in 766 literature titles and eight associated literature notes.
