Common Augere, Fine-ribbed Auger, Eastern Auger
Phylum: Mollusca | Class: Gastropoda | Subclass: Caenogastropoda | Order: Neogastropoda | Family: Terebridae | Genus: Terebra (or Hastula/Neoterebra) | Species: Terebra dislocata · Terebridae (Auger snails / Terebras) · Gastropod (univalve snail); complete shell; elongated high-spired, turreted/slender-cone shape.
Species
Terebra dislocata (High confidence: 95%)
Shell Type
Gastropod (univalve snail); complete shell; elongated high-spired, turreted/slender-cone shape.
Family
Terebridae (Auger snails / Terebras)
Size
Approximately 1.0 to 1.2 inches (25-30 mm) long. Fits typical adult range of 1.0 to 2.25 inches (25-55 mm).
Color & Pattern
Off-white to light cream/buff color. Light surface weathering/bleaching consistent with beach findings. Displays clear sculptured axial ribs crossed by fine spiral grooves, with a prominent spiral band or groove below the suture on each whorl.
Rarity
Common (though easily overlooked due to small size and tendency to bury in wet sand).
Habitat
Marine. Found in shallow subtidal to intertidal zones, buried in sand or fine sediment near mudflats, inlets, and open sandy ocean beaches.
Geographic Range
Western Atlantic from Virginia south through Florida, the Gulf of Mexico, the Caribbean, and south to Brazil. Highly typical for Oak Island, NC.
Description
An elegant, highly elongated auger shell with a slender, sharply pointed spire consisting of numerous flat-sided whorls. The surface is textured with distinct vertical (axial) ribs crossed by fine horizontal lines, creating a delicate beaded grid pattern. A distinct spiral groove cuts near the top of each whorl, creating a double-beaded band right below the suture line.
Key Features
High elongated spire with 10-15 whorls; strong axial ribs bisected by a prominent subsutural groove (giving the appearance of a dislocated or double band at each whorl segment); narrow, small aperture with a short siphonal canal.
Collector Value
Low monetary value ($1 - $5 USD), but holds moderate aesthetic and geographic value for local beachcombers due to its complete apex and fine sculpture details.
Condition Notes
Good to Fine condition. Extremely intact tip (apex) and crisp sculpture details along the entire length. Minor beach wear along the outer lip, natural light sun bleaching.
Interesting Facts
Terebrids are predatory marine snails closely related to cone snails. Unlike their venomous cone snail cousins, Terebra dislocata uses a specialized proboscis and toothless radula to hunt small marine worms beneath the wet sand surface at low tide.
Ecological Role
Active benthic predator feeding on polychaete worms in soft sand habitats; serves as food for shorebirds, crabs, and larger predatory gastropods. Dead shells are frequently used by tiny hermit crabs.
Similar Species
Terebra concava (concave auger, which has inward-curving whorls), Hastula marylandica, and Neoterebra dislocata. Distinguished from other augers by its prominent subsutural line and beaded grid texture.
Beach Finding Tips
Look near the tide line at low tide on sandy beaches around North Carolina inlets, or search in shell drift lines where fine material accumulates. They often leave tiny V-shaped trail marks in wet sand as the tide recedes.
Notes
Oak Island NC