Common Rose Murex (Weathered Juvenile/Fragment), Winged Murex
Phylum: Mollusca, Class: Gastropoda, Order: Neogastropoda, Family: Muricidae, Genus: Chicoreus · Muricidae (Murex or Rock Snail family) · Gastropod (Univalve); specifically a weathered fragment or juvenile showing a flattened, winged variceal structure.
Species
Chicoreus (Triplex) torrefactus or Murex sp. (Confidence: 85% for Muricidae family)
Shell Type
Gastropod (Univalve); specifically a weathered fragment or juvenile showing a flattened, winged variceal structure.
Family
Muricidae (Murex or Rock Snail family)
Size
Approximately 15-20mm in length. This is very small, likely a juvenile or a fragment of a larger shell which can reach 100mm.
Color & Pattern
Uniformly chalky white. The lack of brown or pink pigments suggests the shell is beach-worn and sun-bleached, losing the dark brown fronds typical of living Chicoreus species.
Rarity
Common (as a family/genus in the region), but this specific piece is a highly eroded fragment.
Habitat
Intertidal and shallow subtidal zones, typically found on rocky reefs, coral rubble, or near mangroves in muddy-sand substrates.
Geographic Range
Indo-Pacific region, including the waters of Queensland, Australia (consistent with the Brighton/Sandgate/Brisbane area).
Description
A porcelain-white, irregularly shaped calcified fragment. It exhibits the characteristic 'winged' or 'leaf-like' varices (ribs) of the Murex family. The piece shows a distinct protruding digit or spine on the left and a flattened, flaring structure on the right, suggesting it was once part of a highly ornamental gastropod shell.
Key Features
Presence of a siphonal canal tip, flattened variceal wings, and a small puncture hole likely caused by a predatory gastropod or natural erosion.
Collector Value
Minimal monetary value ($0-$1) due to its fragmented and beach-worn state. Its value is sentimental as a local beach find.
Condition Notes
Poor to Fair. The shell is a heavy-weathered fragment, missing the spire and the majority of the body whorl. The edges are rounded by surf action, and there is a 'drill hole' visible, potentially from a moon snail or octopod predator. Collectibility is low as a specimen, but high as a decorative 'mermaid money' find.
Interesting Facts
Murex snails are famous for their ability to produce 'Tyrian Purple' dye (though usually from Mediterranean species). They are carnivores that use a specialized tongue (radula) to drill into other shells. In Moreton Bay, they play a vital role in controlling bivalve populations.
Ecological Role
Predatory gastropod. When alive, it helps maintain the balance of the ecosystem by preying on barnacles and clams. This fragment is now returning calcium carbonate to the beach environment.
Similar Species
Pterochelus acanthopterus (Winged Murex) or Chicoreus denudatus. Distinguished by the degree of 'wing' flatness and local prevalence in Brisbane waters.
Beach Finding Tips
Look in the tide lines or 'shell drift' after a high tide at Sandgate or Brighton. These light, flattened fragments often wash up further in-shore than heavy, intact shells.
Notes
Brighton Sandgate Brisbane