See text Busycon (Sinistrofulgur) Hollister, 1958 Sinistrofulgur is a genus of large sea snails with left-handed shell-coiling, marine gastropod mollusks in the subfamily Busyconinae.

[1] The taxonomy of sinistral busyconids has been subject to several disputes, including at what rank to recognize them as distinct from their sister taxon, Busycon carica, and how many species are represented.

[3] Hollister recognized four species: B. sinistrum, found between Cape Hatteras, North Carolina and the Florida Keys, as well as off the Yucatan Peninsula east of the Bay of Campeche; B. perversum, endemic to the Bay of Campeche; B. pulleyi, native to the western Gulf of Mexico from the northern coast of Mexico to Breton Sound in Louisiana; and B. aspinosum, at the time only known from Longboat Key on the gulf coast of Florida.

[3] In 2015, Petuch et al. recognized four extant species based on conchological differences: B. perversum, B. pulleyi, B. sinistrum, and B.

[2] Artifacts made of sinistral busyconid shells are abundant in the archaeological record, and include beads, cups, gorgets, pendants, and earplugs, among other things.