Haustrum lacunosum
NameHaustrum lacunosum
Scientific NameHaustrum lacunosum
Common NameLacunose whelk, Oyster borer
FamilyMuricidae
GenusHaustrum
Specieslacunosum
Geographic DistributionEndemic to New Zealand.
Habitatintertidal
Shell Shapeconical
Average Size (mm)Typically ranges from 30 to 70 mm in length. The specimen in the image appears to be in the mid-range of this size.
Identifying FeaturesKey identifying features include the prominent, often wavy or crenulated axial ribs, the robust ovate-conical shell shape, and its characteristic pale coloration. The aperture is typically ovate. It is a predatory gastropod known for drilling into bivalve shells.
Raritycommon
Author Citation(Bruguière, 1789)
Description
Haustrum lacunosum, commonly known as the lacunose whelk or oyster borer, is a medium-sized predatory sea snail. Its shell is characterized by a robust, ovate-conical shape with a moderately elevated spire. A prominent feature is the strong, often somewhat wavy or crenulated axial ribs that run down the whorls, giving the shell a distinctly sculptured and textured appearance. The shell in the image displays these characteristic ribs and a pale, creamy off-white coloration. This species is native to New Zealand and is typically found in intertidal and shallow subtidal rocky environments, where it preys on bivalves.
