Star Shell (also known as Imperial Star Shell or Spiny Star Shell)
Phylum: Mollusca, Class: Gastropoda, Order: Vetigastropoda, Family: Turbinidae, Genus: Guildfordia, Species: Guildfordia triumphans · Turbinidae (Turban and Star shell family) · Gastropod, whole shell, spiral shape with distinctive long spines
Species
Guildfordia triumphans
Shell Type
Gastropod, whole shell, spiral shape with distinctive long spines
Family
Turbinidae (Turban and Star shell family)
Size
Approximately 15-20 mm in diameter (excluding spines), which is typical for a juvenile or small adult specimen of this species. Full adult size generally ranges from 30 to 50 mm.
Color & Pattern
Rich golden-orange or warm amber center with contrasting dark brown to black spiral bands on the body whorl and dramatic dark spines extending outward. The colors are entirely natural, vibrant, and glossy.
Rarity
Uncommon to Rare, especially in pristine condition with all delicate spines fully intact, as they are usually dredged from deep water rather than found on beaches.
Habitat
Found in deep, offshore waters, typically on soft sandy or muddy bottoms at depths ranging from 50 to over 200 meters.
Geographic Range
Indo-West Pacific region, with specific populations recorded around Indonesia (including Maluku), the Philippines, Japan, and northern Australia.
Description
A striking and highly symmetrical turbinid shell featuring a low-spired, depressed whorl pattern adorned with a corona of long, sharply tapering, thorn-like spines. The surface exhibits a polished luster with contrasting warm orange and dark brown bands that swirl gracefully toward the apex.
Key Features
Characterized by its flattened spiral shape, distinct golden-orange central apex, and a ring of prominent, sharp dark spines radiating outward from the periphery of the body whorl.
Collector Value
Moderately high value due to the intact spines and striking coloration. Specimens with perfect, undamaged spines are heavily sought after by specialized shell collectors.
Condition Notes
Gem to Fine condition. The shell appears intact with all major spines preserved, vibrant natural coloration, and no significant weathering or bore holes.
Interesting Facts
Guildfordia shells are famous among collectors for their geometric perfection and delicate, needle-like spines. The species name 'triumphans' translates to triumphant, reflecting its regal and magnificent appearance.
Ecological Role
As marine gastropods, members of the Turbinidae family primarily feed on algae and detritus, helping to maintain benthic balance. They serve as prey for various deep-water carnivores including fish and large crustaceans.
Similar Species
Guildfordia yoka, which tends to be larger and has longer, flatter spines, and Astraea species, which lack the distinct slender spines characteristic of the genus Guildfordia.
Beach Finding Tips
Because this is a deep-water species, they are rarely found as beach drift. They are typically acquired through tangle nets, commercial trawls, or specialized deep-water shell dredging.
Notes
Maluku indonesia