Lamellar Microstructure
Definition
The layer-cake cross-section of pangolin scales visible under light microscopy, reflecting the keratinised plates that build up the scale. Distinguishes pangolin scales from fish scales (bone-based or collagen-based) at low power.
- Appearance
- Layer-cake cross-section under light microscopy
- Material basis
- Keratinised plates
- Found in
- Pangolin scales
- Distinguishes from
- Fish scales (bone or collagen based)
Common questions
Why is distinguishing pangolin scales from fish scales forensically important?+
Pangolin scales are trafficked as a high-value wildlife product under CITES protection, and dried or processed scales can superficially resemble other keratin or scale-like materials, so a reliable microscopic distinction supports species identification in seizure cases.
What confirms a lamellar structure is keratin rather than bone?+
Keratin lacks the mineralised, cellular bone architecture (such as osteons or lacunae) visible in true fish scales under the same magnification, and simple chemical or burn tests can further confirm a keratin-based material.
Related terms
- CITES Leather Guide
- A reference document maintained by the CITES Secretariat providing scale/pit patterns, macroscopic key characters, and species notes for major commercially traded reptile...
- Histological Cross-Section
- A 5-10 micrometre thin section cut perpendicular to the skin surface, stained and mounted for light microscopy. Reveals dermis architecture (collagen orientation,...
- Integumentary Sense Organ (ISO)
- Pressure and chemical sensory pits visible as small circular depressions on reptile scales. In crocodilians their distribution pattern distinguishes crocodiles from alligators...
- Osteoderm
- Bone embedded within the skin dermis, characteristic of crocodilians and some lizards. Survives tanning and provides a species-group identification marker visible as...
- Pit Pattern
- The arrangement of scale pits or ISO pores on reptile skin. Scale pit pattern is one of the primary characters in the...