Ladd's Wentletrap (also known as the Pagoda Wentletrap)
Phylum: Mollusca, Class: Gastropoda, Order: Caenogastropoda, Family: Epitoniidae, Genus: Epitonium, Species: laddae · Epitoniidae (Wentletrap family) · Gastropod (univalve); High-spired, turreted shell
Species
Epitonium laddae
Shell Type
Gastropod (univalve); High-spired, turreted shell
Family
Epitoniidae (Wentletrap family)
Size
Approximately 12-15mm (0.5 inches); this is a mature size for this relatively small species. It is consistent with the standard range of 10-20mm.
Color & Pattern
Overall chalky white to translucent white. This specimen appears slightly blue-tinted due to the lighting and background contrast, but it lacks natural colorful pigments. It does not show pattern banding, which is typical for the genus.
Rarity
Uncommon; wentletraps are highly sought after by collectors and are rarely found on the beach in perfect condition due to their delicate costae (ribs).
Habitat
Offshore muddy or sandy bottoms, typically in deeper sublittoral waters. Members of this family are often associated with sea anemones or corals.
Geographic Range
Indo-Pacific distribution; specifically common around the Philippines, Australia, and spanning into the central Pacific islands.
Description
A beautiful, architecturally striking shell featuring a high, turreted spire. The whorls are characterized by prominent, wing-like longitudinal ribs called 'costae' that are angled or 'coronated' at the shoulders, giving it a stepped or pagoda-like appearance. The texture is smooth and porcelain-like between the ribs.
Key Features
Distinguished by the 'coronated' or sharp-angled peaks on the costae at each whorl's shoulder; high spire with deeply impressed sutures; a circular aperture with a thickened lip.
Collector Value
Moderate desirability. While not as expensive as the 'Precious Wentletrap' (Epitonium scalare), this species is a favorite for specialized miniature collectors. Value for a specimen in this condition is typically $10-$25 USD.
Condition Notes
Good to Fine. The spire tip (apex) appears intact, which is rare. The ribs show minor wear but maintain their distinct angular shape. The shell appears clean of encrusting organisms.
Interesting Facts
The name 'Wentletrap' comes from the Dutch word 'wenteltrap,' meaning spiral staircase. Animals in this family are predatory or ectoparasitic, specifically feeding on the tentacles of sea anemones by using a specialized proboscis.
Ecological Role
Specialized carnivore. It plays a unique role in reef and sublittoral ecosystems by regulating sea anemone populations without killing the host, acting more as a parasite than a predator.
Similar Species
Epitonium scalare (Precious Wentletrap) is much larger and lacks the sharp angular shoulders; Epitonium pagoda is similar but has more numerous, less wing-like ribs.
Beach Finding Tips
Look in the 'wash' line of fine shell drift after a storm. Because they are light, they are often pushed to the highest tide line. Using a magnifying glass or sifting through shell grit is the best way to locate them.