Marine Gastropod Shell Specimen – Spiral Conch-Type (Calcareous Exoskeleton)

Taxonomic Classification (Morphological Basis):

• Phylum: Mollusca
• Class: Gastropoda
• Subclass: Caenogastropoda
• Probable Family: Muricidae/Strombidae (morphology-based assessment)

Morphological Characteristics:

• Univalve, dextral spiral with elevated spire
• Prominent axial varices and spiral sculpture
• Broad ovate aperture with thickened, crenulated lip
• Moderately elongated anterior siphonal canal
• Beige–brown exterior; orange interior aperture

Material Composition:

• Aragonite (CaCO₃) primary mineral phase
• Conchiolin organic matrix
• Cross-lamellar microstructure

Functional & Environmental Notes:

• Reinforced varices for structural protection
• Siphonal canal adapted for benthic feeding
• Typical of tropical to subtropical marine habitats

Condition:

• Aperture intact
• Minimal surface erosion
• Apex preserved