Oyster Drill
NameOyster Drill
Scientific NameChicoreus brunneus
Common NameBrown Murex
FamilyMuricidae
GenusChicoreus
Speciesbrunneus
Geographic DistributionIndo-Pacific region, including East Africa, Red Sea, Indian Ocean, and Western Pacific.
Shell Shapefusiform
Average Size (mm)60
Identifying FeaturesThree prominent, frilly or spiny axial varices per whorl; strong, nodulose spiral cords; high, pointed spire; ovate aperture with a distinctly crenulated or denticulate outer lip; short, open siphonal canal; mottled brown and white/cream coloration.
Raritycommon
Author Citation(Link, 1807)
Description
A robust, medium-sized gastropod shell characterized by its highly sculptured surface. It exhibits a fusiform shape with a moderately high spire. The shell is adorned with prominent, frilly or spiny axial varices and strong, nodulose spiral cords, giving it a very rough and textured appearance. The coloration is a mottled mix of brown and white or cream, often with darker brown bands. The aperture is ovate, featuring a distinctly crenulated or denticulate outer lip and a smooth, whitish columella. A short, open siphonal canal is present.
